{"id":"https://openalex.org/W7204726625","doi":"https://doi.org/10.3390/universe12090263","title":"A Decade of Radial-Velocity Monitoring of \u03c1 Leo: Moment Analysis and Periodic Variability","display_name":"A Decade of Radial-Velocity Monitoring of \u03c1 Leo: Moment Analysis and Periodic Variability","publication_year":2026,"publication_date":"2026-08-30","ids":{"openalex":"https://openalex.org/W7204726625","doi":"https://doi.org/10.3390/universe12090263"},"language":"en","primary_location":{"id":"doi:10.3390/universe12090263","doi":"https://doi.org/10.3390/universe12090263","is_oa":true,"landing_page_url":"https://doi.org/10.3390/universe12090263","pdf_url":null,"source":{"id":"https://openalex.org/S2737774819","display_name":"Universe","issn_l":"2218-1997","issn":["2218-1997"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","norway-1","poland-70","russia-white-list-2"],"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Universe","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["arxiv","crossref","datacite","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://doi.org/10.3390/universe12090263","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5023468725","display_name":"Vitalii Checha","orcid":"https://orcid.org/0000-0002-2530-8007","observed_orcids":["https://orcid.org/0000-0002-2530-8007"]},"institutions":[{"id":"https://openalex.org/I2802841028","display_name":"Tartu Observatory","ror":"https://ror.org/04mc23283","country_code":"EE","type":"archive","lineage":["https://openalex.org/I172656520","https://openalex.org/I2802841028","https://openalex.org/I56085075"]},{"id":"https://openalex.org/I56085075","display_name":"University of Tartu","ror":"https://ror.org/03z77qz90","country_code":"EE","type":"education","lineage":["https://openalex.org/I56085075"]}],"countries":["EE"],"is_corresponding":true,"raw_author_name":"Vitalii Checha","raw_affiliation_strings":["Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia"],"raw_orcid":"https://orcid.org/0000-0002-2530-8007","affiliations":[{"raw_affiliation_string":"Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia","institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5007713904","display_name":"A. Aret","orcid":"https://orcid.org/0000-0002-6104-298X","observed_orcids":["https://orcid.org/0000-0002-6104-298X"]},"institutions":[{"id":"https://openalex.org/I2802841028","display_name":"Tartu Observatory","ror":"https://ror.org/04mc23283","country_code":"EE","type":"archive","lineage":["https://openalex.org/I172656520","https://openalex.org/I2802841028","https://openalex.org/I56085075"]},{"id":"https://openalex.org/I56085075","display_name":"University of Tartu","ror":"https://ror.org/03z77qz90","country_code":"EE","type":"education","lineage":["https://openalex.org/I56085075"]}],"countries":["EE"],"is_corresponding":false,"raw_author_name":"Anna Aret","raw_affiliation_strings":["Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia"],"raw_orcid":"https://orcid.org/0000-0002-6104-298X","affiliations":[{"raw_affiliation_string":"Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia","institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5054776059","display_name":"Indrek Kolka","orcid":"https://orcid.org/0000-0001-7780-7708","observed_orcids":["https://orcid.org/0000-0001-7780-7708"]},"institutions":[{"id":"https://openalex.org/I2802841028","display_name":"Tartu Observatory","ror":"https://ror.org/04mc23283","country_code":"EE","type":"archive","lineage":["https://openalex.org/I172656520","https://openalex.org/I2802841028","https://openalex.org/I56085075"]},{"id":"https://openalex.org/I56085075","display_name":"University of Tartu","ror":"https://ror.org/03z77qz90","country_code":"EE","type":"education","lineage":["https://openalex.org/I56085075"]}],"countries":["EE"],"is_corresponding":false,"raw_author_name":"Indrek Kolka","raw_affiliation_strings":["Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia"],"raw_orcid":"https://orcid.org/0000-0001-7780-7708","affiliations":[{"raw_affiliation_string":"Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia","institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5047335456","display_name":"T. Liimets","orcid":"https://orcid.org/0000-0003-2196-9091","observed_orcids":["https://orcid.org/0000-0003-2196-9091"]},"institutions":[{"id":"https://openalex.org/I2802841028","display_name":"Tartu Observatory","ror":"https://ror.org/04mc23283","country_code":"EE","type":"archive","lineage":["https://openalex.org/I172656520","https://openalex.org/I2802841028","https://openalex.org/I56085075"]},{"id":"https://openalex.org/I56085075","display_name":"University of Tartu","ror":"https://ror.org/03z77qz90","country_code":"EE","type":"education","lineage":["https://openalex.org/I56085075"]}],"countries":["EE"],"is_corresponding":false,"raw_author_name":"Tiina Liimets","raw_affiliation_strings":["Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia"],"raw_orcid":"https://orcid.org/0000-0003-2196-9091","affiliations":[{"raw_affiliation_string":"Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia","institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5042332498","display_name":"Veronika Mitrokhina","orcid":"https://orcid.org/0009-0006-9373-5023","observed_orcids":["https://orcid.org/0009-0006-9373-5023"]},"institutions":[{"id":"https://openalex.org/I2802841028","display_name":"Tartu Observatory","ror":"https://ror.org/04mc23283","country_code":"EE","type":"archive","lineage":["https://openalex.org/I172656520","https://openalex.org/I2802841028","https://openalex.org/I56085075"]},{"id":"https://openalex.org/I56085075","display_name":"University of Tartu","ror":"https://ror.org/03z77qz90","country_code":"EE","type":"education","lineage":["https://openalex.org/I56085075"]}],"countries":["EE"],"is_corresponding":false,"raw_author_name":"Veronika Mitrokhina","raw_affiliation_strings":["Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia"],"raw_orcid":"https://orcid.org/0009-0006-9373-5023","affiliations":[{"raw_affiliation_string":"Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia","institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5072520471","display_name":"Anni Kasikov","orcid":"https://orcid.org/0000-0002-1823-3975","observed_orcids":["https://orcid.org/0000-0002-1823-3975"]},"institutions":[{"id":"https://openalex.org/I2802841028","display_name":"Tartu Observatory","ror":"https://ror.org/04mc23283","country_code":"EE","type":"archive","lineage":["https://openalex.org/I172656520","https://openalex.org/I2802841028","https://openalex.org/I56085075"]},{"id":"https://openalex.org/I56085075","display_name":"University of Tartu","ror":"https://ror.org/03z77qz90","country_code":"EE","type":"education","lineage":["https://openalex.org/I56085075"]}],"countries":["EE"],"is_corresponding":false,"raw_author_name":"Anni Kasikov","raw_affiliation_strings":["Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia"],"raw_orcid":"https://orcid.org/0000-0002-1823-3975","affiliations":[{"raw_affiliation_string":"Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia","institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5081538745","display_name":"T. Eenm\u00e4e","orcid":"https://orcid.org/0000-0001-9948-0443","observed_orcids":["https://orcid.org/0000-0001-9948-0443"]},"institutions":[{"id":"https://openalex.org/I2802841028","display_name":"Tartu Observatory","ror":"https://ror.org/04mc23283","country_code":"EE","type":"archive","lineage":["https://openalex.org/I172656520","https://openalex.org/I2802841028","https://openalex.org/I56085075"]},{"id":"https://openalex.org/I56085075","display_name":"University of Tartu","ror":"https://ror.org/03z77qz90","country_code":"EE","type":"education","lineage":["https://openalex.org/I56085075"]}],"countries":["EE"],"is_corresponding":false,"raw_author_name":"T\u00f5nis Eenm\u00e4e","raw_affiliation_strings":["Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia"],"raw_orcid":"https://orcid.org/0000-0001-9948-0443","affiliations":[{"raw_affiliation_string":"Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia","institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5119870139","display_name":"Sandipan P.D. Borthakur","orcid":"https://orcid.org/0009-0004-1465-634X","observed_orcids":["https://orcid.org/0009-0004-1465-634X"]},"institutions":[{"id":"https://openalex.org/I138211613","display_name":"Austrian Academy of Sciences","ror":"https://ror.org/03anc3s24","country_code":"AT","type":"government","lineage":["https://openalex.org/I138211613"]},{"id":"https://openalex.org/I2802841028","display_name":"Tartu Observatory","ror":"https://ror.org/04mc23283","country_code":"EE","type":"archive","lineage":["https://openalex.org/I172656520","https://openalex.org/I2802841028","https://openalex.org/I56085075"]},{"id":"https://openalex.org/I4092182","display_name":"Graz University of Technology","ror":"https://ror.org/00d7xrm67","country_code":"AT","type":"education","lineage":["https://openalex.org/I4092182"]},{"id":"https://openalex.org/I4210091641","display_name":"Space Research Institute","ror":"https://ror.org/002w0jp71","country_code":"AT","type":"facility","lineage":["https://openalex.org/I138211613","https://openalex.org/I4210091641"]},{"id":"https://openalex.org/I56085075","display_name":"University of Tartu","ror":"https://ror.org/03z77qz90","country_code":"EE","type":"education","lineage":["https://openalex.org/I56085075"]}],"countries":["AT","EE"],"is_corresponding":false,"raw_author_name":"Sandipan P. D. Borthakur","raw_affiliation_strings":["Institute for Theoretical and Computation Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria","Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria","Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia"],"raw_orcid":"https://orcid.org/0009-0004-1465-634X","affiliations":[{"raw_affiliation_string":"Institute for Theoretical and Computation Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria","institution_ids":["https://openalex.org/I4092182"]},{"raw_affiliation_string":"Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria","institution_ids":["https://openalex.org/I138211613","https://openalex.org/I4210091641"]},{"raw_affiliation_string":"Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia","institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5080683813","display_name":"Heleri Ramler","orcid":"https://orcid.org/0000-0003-0288-579X","observed_orcids":["https://orcid.org/0000-0003-0288-579X"]},"institutions":[{"id":"https://openalex.org/I2802841028","display_name":"Tartu Observatory","ror":"https://ror.org/04mc23283","country_code":"EE","type":"archive","lineage":["https://openalex.org/I172656520","https://openalex.org/I2802841028","https://openalex.org/I56085075"]},{"id":"https://openalex.org/I56085075","display_name":"University of Tartu","ror":"https://ror.org/03z77qz90","country_code":"EE","type":"education","lineage":["https://openalex.org/I56085075"]}],"countries":["EE"],"is_corresponding":false,"raw_author_name":"Heleri Ramler","raw_affiliation_strings":["Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia"],"raw_orcid":"https://orcid.org/0000-0003-0288-579X","affiliations":[{"raw_affiliation_string":"Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 T\u00f5ravere, Estonia","institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5023468725"],"corresponding_institution_ids":["https://openalex.org/I2802841028","https://openalex.org/I56085075"],"apc_list":{"value":1600,"currency":"CHF","value_usd":1930},"apc_paid":{"value":1600,"currency":"CHF","value_usd":1930},"fwci":0.0,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":{"value":0.55826817,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"12","issue":"9","first_page":"263","last_page":"263"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12917","display_name":"Astronomy and Astrophysical Research","score":0.00019999999494757503,"subfield":{"id":"https://openalex.org/subfields/3105","display_name":"Instrumentation"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10251","display_name":"Solar and Space Plasma Dynamics","score":0.0,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/blue-supergiants","display_name":"blue supergiants","score":0.9470000267028809},{"id":"https://openalex.org/keywords/radial-velocity-monitoring","display_name":"radial velocity monitoring","score":0.656000018119812},{"id":"https://openalex.org/keywords/line-profile-variations","display_name":"line profile variability","score":0.7070000171661377},{"id":"https://openalex.org/keywords/non-radial-pulsations","display_name":"non-radial pulsations","score":0.843999981880188},{"id":"https://openalex.org/keywords/binary-companion","display_name":"binary companion","score":0.42500001192092896},{"id":"https://openalex.org/keywords/photometric-variability","display_name":"photometric variability","score":0.8519999980926514},{"id":"https://openalex.org/keywords/he-i-lines","display_name":"He I lines","score":0.4429999887943268},{"id":"https://openalex.org/keywords/lomb-scargle-periodogram","display_name":"Lomb-Scargle periodogram","score":0.7829999923706055},{"id":"https://openalex.org/keywords/long-term-variability","display_name":"long-term variability","score":0.550000011920929}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.8210999965667725},{"id":"https://openalex.org/C68271606","wikidata":"https://www.wikidata.org/wiki/Q625648","display_name":"Photometry (optics)","level":3,"score":0.7179999947547913},{"id":"https://openalex.org/C180205008","wikidata":"https://www.wikidata.org/wiki/Q159190","display_name":"Amplitude","level":2,"score":0.6363000273704529},{"id":"https://openalex.org/C47432892","wikidata":"https://www.wikidata.org/wiki/Q831390","display_name":"Wavelet","level":2,"score":0.6308000087738037},{"id":"https://openalex.org/C198785896","wikidata":"https://www.wikidata.org/wiki/Q193599","display_name":"Supergiant","level":3,"score":0.5821999907493591},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.578499972820282},{"id":"https://openalex.org/C48372109","wikidata":"https://www.wikidata.org/wiki/Q3913","display_name":"Binary number","level":2,"score":0.42559999227523804},{"id":"https://openalex.org/C143724316","wikidata":"https://www.wikidata.org/wiki/Q312468","display_name":"Series (stratigraphy)","level":2,"score":0.4242999851703644},{"id":"https://openalex.org/C2983668108","wikidata":"https://www.wikidata.org/wiki/Q280453","display_name":"Spectral analysis","level":3,"score":0.4131999909877777},{"id":"https://openalex.org/C112972136","wikidata":"https://www.wikidata.org/wiki/Q7595718","display_name":"Stability (learning theory)","level":2,"score":0.40220001339912415},{"id":"https://openalex.org/C197680801","wikidata":"https://www.wikidata.org/wiki/Q587619","display_name":"Periodogram","level":2,"score":0.39239999651908875},{"id":"https://openalex.org/C4839761","wikidata":"https://www.wikidata.org/wiki/Q212111","display_name":"Spectral line","level":2,"score":0.38530001044273376},{"id":"https://openalex.org/C203024314","wikidata":"https://www.wikidata.org/wiki/Q1365258","display_name":"Fourier analysis","level":3,"score":0.3831999897956848},{"id":"https://openalex.org/C121864883","wikidata":"https://www.wikidata.org/wiki/Q677916","display_name":"Statistical physics","level":1,"score":0.3634999990463257},{"id":"https://openalex.org/C130726490","wikidata":"https://www.wikidata.org/wiki/Q675076","display_name":"Light curve","level":2,"score":0.36149999499320984},{"id":"https://openalex.org/C180690934","wikidata":"https://www.wikidata.org/wiki/Q25377588","display_name":"Stellar classification","level":3,"score":0.3605000078678131},{"id":"https://openalex.org/C2779843651","wikidata":"https://www.wikidata.org/wiki/Q7390335","display_name":"SIGNAL (programming language)","level":2,"score":0.3549000024795532},{"id":"https://openalex.org/C179254644","wikidata":"https://www.wikidata.org/wiki/Q13222844","display_name":"Moment (physics)","level":2,"score":0.3407000005245209},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.3328999876976013},{"id":"https://openalex.org/C151406439","wikidata":"https://www.wikidata.org/wiki/Q186588","display_name":"Time series","level":2,"score":0.32839998602867126},{"id":"https://openalex.org/C2780848835","wikidata":"https://www.wikidata.org/wiki/Q4213","display_name":"Telescope","level":2,"score":0.3174000084400177},{"id":"https://openalex.org/C32891209","wikidata":"https://www.wikidata.org/wiki/Q483666","display_name":"Spectroscopy","level":2,"score":0.3140999972820282},{"id":"https://openalex.org/C168110828","wikidata":"https://www.wikidata.org/wiki/Q1331626","display_name":"Spectral density","level":2,"score":0.3027999997138977},{"id":"https://openalex.org/C112197492","wikidata":"https://www.wikidata.org/wiki/Q1763933","display_name":"Secular variation","level":2,"score":0.2858000099658966},{"id":"https://openalex.org/C32161561","wikidata":"https://www.wikidata.org/wiki/Q1893536","display_name":"Starspot","level":3,"score":0.2833000123500824},{"id":"https://openalex.org/C97855336","wikidata":"https://www.wikidata.org/wiki/Q2285125","display_name":"Signal averaging","level":5,"score":0.2757999897003174},{"id":"https://openalex.org/C197640229","wikidata":"https://www.wikidata.org/wiki/Q2534066","display_name":"Predictability","level":2,"score":0.26579999923706055},{"id":"https://openalex.org/C43571822","wikidata":"https://www.wikidata.org/wiki/Q599037","display_name":"Near-infrared spectroscopy","level":2,"score":0.25850000977516174}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.3390/universe12090263","doi":"https://doi.org/10.3390/universe12090263","is_oa":true,"landing_page_url":"https://doi.org/10.3390/universe12090263","pdf_url":null,"source":{"id":"https://openalex.org/S2737774819","display_name":"Universe","issn_l":"2218-1997","issn":["2218-1997"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","norway-1","poland-70","russia-white-list-2"],"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Universe","raw_type":"journal-article"},{"id":"pmh:oai:arXiv.org:2608.28039","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.28039","pdf_url":"https://arxiv.org/pdf/2608.28039","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"pmh:oai:doaj.org/article:51cb2a3467a54f17a89812be19297977","doi":null,"is_oa":false,"landing_page_url":"https://doaj.org/article/51cb2a3467a54f17a89812be19297977","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Universe, Vol 12, Iss 9, p 263 (2026)","raw_type":"article"},{"id":"doi:10.48550/arxiv.2608.28039","doi":"https://doi.org/10.48550/arxiv.2608.28039","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2608.28039","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"doi:10.3390/universe12090263","doi":"https://doi.org/10.3390/universe12090263","is_oa":true,"landing_page_url":"https://doi.org/10.3390/universe12090263","pdf_url":null,"source":{"id":"https://openalex.org/S2737774819","display_name":"Universe","issn_l":"2218-1997","issn":["2218-1997"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","norway-1","poland-70","russia-white-list-2"],"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Universe","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G2432649393","display_name":null,"funder_award_id":"IUT-40","funder_id":"https://openalex.org/F4320321090","funder_display_name":"Eesti Teadusagentuur"},{"id":"https://openalex.org/G4755043463","display_name":null,"funder_award_id":"101079231","funder_id":"https://openalex.org/F4320334322","funder_display_name":"HORIZON EUROPE Framework Programme"},{"id":"https://openalex.org/G58316358","display_name":null,"funder_award_id":"NAS 526555","funder_id":"https://openalex.org/F4320306101","funder_display_name":"National Aeronautics and Space Administration"},{"id":"https://openalex.org/G6054641463","display_name":"Physics of Extreme Massive Stars","funder_award_id":"823734","funder_id":"https://openalex.org/F4320320300","funder_display_name":"European Commission"},{"id":"https://openalex.org/G6488390557","display_name":"Building Excellence in Spectral Characterisation of Exoplanet Hosts and Other Stars","funder_award_id":"101079231","funder_id":"https://openalex.org/F4320320300","funder_display_name":"European Commission"},{"id":"https://openalex.org/G6622439793","display_name":null,"funder_award_id":"10051045","funder_id":"https://openalex.org/F4320334322","funder_display_name":"HORIZON EUROPE Framework Programme"},{"id":"https://openalex.org/G701014588","display_name":null,"funder_award_id":"10051045","funder_id":"https://openalex.org/F4320314731","funder_display_name":"UK Research and Innovation"},{"id":"https://openalex.org/G75240278","display_name":"European Space Agency","funder_award_id":"TARISTU24-TK3","funder_id":"https://openalex.org/F4320321090","funder_display_name":"Eesti Teadusagentuur"}],"funders":[{"id":"https://openalex.org/F4320306101","display_name":"National Aeronautics and Space Administration","ror":"https://ror.org/027ka1x80"},{"id":"https://openalex.org/F4320314503","display_name":"Space Telescope Science Institute","ror":"https://ror.org/036f5mx38"},{"id":"https://openalex.org/F4320314731","display_name":"UK Research and Innovation","ror":"https://ror.org/001aqnf71"},{"id":"https://openalex.org/F4320320300","display_name":"European Commission","ror":"https://ror.org/00k4n6c32"},{"id":"https://openalex.org/F4320321090","display_name":"Eesti Teadusagentuur","ror":"https://ror.org/00jjeja18"},{"id":"https://openalex.org/F4320334322","display_name":"HORIZON EUROPE Framework Programme","ror":null},{"id":"https://openalex.org/F4320338036","display_name":"Astrophysics Division","ror":"https://ror.org/021z1wf35"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7204726625.pdf","grobid_xml":"https://content.openalex.org/works/W7204726625.grobid-xml"},"referenced_works_count":49,"referenced_works":["https://openalex.org/W1530767725","https://openalex.org/W1548307237","https://openalex.org/W1892618945","https://openalex.org/W1967156117","https://openalex.org/W1967284924","https://openalex.org/W1969368385","https://openalex.org/W1974618482","https://openalex.org/W1975159916","https://openalex.org/W1986316936","https://openalex.org/W2012964785","https://openalex.org/W2031009575","https://openalex.org/W2053242865","https://openalex.org/W2067294085","https://openalex.org/W2075033088","https://openalex.org/W2076151967","https://openalex.org/W2080868394","https://openalex.org/W2085553654","https://openalex.org/W2089308137","https://openalex.org/W2113818894","https://openalex.org/W2125186855","https://openalex.org/W2132540793","https://openalex.org/W2157791991","https://openalex.org/W2169596854","https://openalex.org/W2307105618","https://openalex.org/W2402806345","https://openalex.org/W2434803014","https://openalex.org/W2499105366","https://openalex.org/W2786916084","https://openalex.org/W3037126510","https://openalex.org/W3081681265","https://openalex.org/W3112453294","https://openalex.org/W3118061153","https://openalex.org/W3214373112","https://openalex.org/W4238632012","https://openalex.org/W4256441065","https://openalex.org/W4283743339","https://openalex.org/W4292309267","https://openalex.org/W4379051691","https://openalex.org/W4386090952","https://openalex.org/W4390399194","https://openalex.org/W4399105669","https://openalex.org/W4399155098","https://openalex.org/W4399972502","https://openalex.org/W4405649853","https://openalex.org/W4415543922","https://openalex.org/W4417530764","https://openalex.org/W7161573384","https://openalex.org/W7167618826","https://openalex.org/W7172020836"],"related_works":["https://openalex.org/W7204856456","https://openalex.org/W4417530764","https://openalex.org/W7118844632","https://openalex.org/W2053242865","https://openalex.org/W2328397608","https://openalex.org/W3018168524","https://openalex.org/W6903163853","https://openalex.org/W3081681265","https://openalex.org/W2786916084","https://openalex.org/W4298168395"],"abstract_inverted_index":{"We":[0,60,103],"investigate":[1],"the":[2,11,51,68,85,99,113,120,137,163,172,183,189,202],"origin":[3,187],"of":[4,67,128,182,188],"long-term":[5],"spectroscopic":[6,38,164],"and":[7,24,55,75,92,115,140],"photometric":[8],"variability":[9,25,63,156,205],"in":[10,112,136,143],"blue":[12],"supergiant":[13],"\u03c1":[14],"Leo,":[15],"with":[16,89,98,124],"particular":[17],"emphasis":[18],"on":[19,35],"distinguishing":[20,195],"between":[21,196],"intrinsic":[22],"pulsations":[23,181],"induced":[26],"by":[27,46,201],"a":[28,105,125,148,154],"possible":[29],"companion.":[30],"Our":[31],"analysis":[32],"is":[33,133,141,191,199],"based":[34],"an":[36],"11.5-year":[37],"time":[39],"series":[40],"obtained":[41],"at":[42,109],"Tartu":[43],"Observatory,":[44],"complemented":[45],"high-cadence,":[47],"high-resolution":[48],"spectroscopy":[49],"from":[50,58,179],"Hertzsprung":[52],"SONG":[53,138],"telescope":[54],"space-based":[56],"photometry":[57],"TESS.":[59],"studied":[61],"line-profile":[62],"using":[64,84],"normalised":[65],"moments":[66],"He":[69,72],"i":[70,73],"\u03bb6678,":[71],"\u03bb5875,":[74],"Si":[76],"iii":[77],"\u03bb4552":[78],"lines.":[79],"Periodic":[80],"signals":[81],"were":[82],"identified":[83],"generalised":[86],"Lomb\u2013Scargle":[87],"periodogram":[88],"iterative":[90],"pre-whitening,":[91],"their":[93],"temporal":[94],"stability":[95],"was":[96],"examined":[97],"weighted":[100],"wavelet":[101],"Z-transform.":[102],"detect":[104],"persistent":[106],"periodic":[107],"signal":[108,132,190],"P=16.46":[110],"d":[111],"first":[114],"third":[116],"moments,":[117],"present":[118,135,170],"throughout":[119,171],"full":[121],"observing":[122,174],"interval,":[123,175],"radial-velocity":[126],"amplitude":[127],"3.9":[129],"km/s.":[130],"This":[131],"also":[134],"data":[139],"visible":[142],"multiple":[144],"spectral":[145],"lines,":[146],"indicating":[147],"global":[149],"origin.":[150],"Photometric":[151],"observations":[152],"reveal":[153],"dominant":[155],"timescale":[157],"near":[158],"\u224833":[159],"d,":[160],"approximately":[161],"twice":[162],"period.":[165],"The":[166],"stable":[167],"16.46-day":[168],"period,":[169],"entire":[173],"most":[176],"likely":[177],"results":[178],"non-radial":[180],"supergiant.":[184],"A":[185],"binary":[186],"not":[192],"excluded,":[193],"but":[194],"these":[197],"scenarios":[198],"complicated":[200],"supergiant\u2019s":[203],"complex":[204],"pattern.":[206]},"counts_by_year":[],"updated_date":"2026-11-06T12:05:46.655746","created_date":"2026-08-31T00:00:00"}
