{"id":"https://openalex.org/W2079924971","doi":"https://doi.org/10.1051/0004-6361:20030671","title":"Starspot activity on the RS CVn-type binary II Pegasi during 1999-2001","display_name":"Starspot activity on the RS CVn-type binary II Pegasi during 1999-2001","publication_year":2003,"publication_date":"2003-06-19","ids":{"openalex":"https://openalex.org/W2079924971","doi":"https://doi.org/10.1051/0004-6361:20030671","mag":"2079924971"},"language":"en","primary_location":{"id":"doi:10.1051/0004-6361:20030671","doi":"https://doi.org/10.1051/0004-6361:20030671","is_oa":true,"landing_page_url":"https://doi.org/10.1051/0004-6361:20030671","pdf_url":"https://www.aanda.org/articles/aa/pdf/2003/26/aa3086.pdf","source":{"id":"https://openalex.org/S205231332","display_name":"Astronomy and Astrophysics","issn_l":"0004-6361","issn":["0004-6361","1432-0746"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-3","ki-jl-2","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319748","host_organization_name":"EDP Sciences","host_organization_lineage":["https://openalex.org/P4310319748","https://openalex.org/P4310319982"],"host_organization_lineage_names":["EDP Sciences","Science Press"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Astronomy & Astrophysics","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://www.aanda.org/articles/aa/pdf/2003/26/aa3086.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5114027205","display_name":"S.-H. Gu","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I19820366","display_name":"Chinese Academy of Sciences","ror":"https://ror.org/034t30j35","country_code":"CN","type":"government","lineage":["https://openalex.org/I19820366"]},{"id":"https://openalex.org/I2801168720","display_name":"Yunnan Observatories","ror":"https://ror.org/02f42pw58","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I2801168720","https://openalex.org/I4210164580"]},{"id":"https://openalex.org/I4210164580","display_name":"National Astronomical Observatories","ror":"https://ror.org/058pyyv44","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210164580"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"S.-H. Gu","raw_affiliation_strings":["National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming, PR China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming, PR China","institution_ids":["https://openalex.org/I19820366","https://openalex.org/I2801168720","https://openalex.org/I4210164580"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5080263560","display_name":"Hong-Bo Tan","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I19820366","display_name":"Chinese Academy of Sciences","ror":"https://ror.org/034t30j35","country_code":"CN","type":"government","lineage":["https://openalex.org/I19820366"]},{"id":"https://openalex.org/I2801168720","display_name":"Yunnan Observatories","ror":"https://ror.org/02f42pw58","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I2801168720","https://openalex.org/I4210164580"]},{"id":"https://openalex.org/I4210164580","display_name":"National Astronomical Observatories","ror":"https://ror.org/058pyyv44","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210164580"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"H.-S. Tan","raw_affiliation_strings":["National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming, PR China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming, PR China","institution_ids":["https://openalex.org/I19820366","https://openalex.org/I2801168720","https://openalex.org/I4210164580"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5083685823","display_name":"X.-B. Wang","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I19820366","display_name":"Chinese Academy of Sciences","ror":"https://ror.org/034t30j35","country_code":"CN","type":"government","lineage":["https://openalex.org/I19820366"]},{"id":"https://openalex.org/I2801168720","display_name":"Yunnan Observatories","ror":"https://ror.org/02f42pw58","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I2801168720","https://openalex.org/I4210164580"]},{"id":"https://openalex.org/I4210164580","display_name":"National Astronomical Observatories","ror":"https://ror.org/058pyyv44","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210164580"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"X.-B. Wang","raw_affiliation_strings":["National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming, PR China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming, PR China","institution_ids":["https://openalex.org/I19820366","https://openalex.org/I2801168720","https://openalex.org/I4210164580"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5103875279","display_name":"H. G. Shan","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I19820366","display_name":"Chinese Academy of Sciences","ror":"https://ror.org/034t30j35","country_code":"CN","type":"government","lineage":["https://openalex.org/I19820366"]},{"id":"https://openalex.org/I2801168720","display_name":"Yunnan Observatories","ror":"https://ror.org/02f42pw58","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I2801168720","https://openalex.org/I4210164580"]},{"id":"https://openalex.org/I4210164580","display_name":"National Astronomical Observatories","ror":"https://ror.org/058pyyv44","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210164580"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"H.-G. Shan","raw_affiliation_strings":["National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming, PR China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming, PR China","institution_ids":["https://openalex.org/I19820366","https://openalex.org/I2801168720","https://openalex.org/I4210164580"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":1650,"currency":"EUR","value_usd":1865},"apc_paid":null,"fwci":0.0,"has_fulltext":true,"cited_by_count":20,"citation_normalized_percentile":{"value":0.0,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":97},"biblio":{"volume":"405","issue":"2","first_page":"763","last_page":"768"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.9984999895095825,"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":0.9984999895095825,"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/T10251","display_name":"Solar and Space Plasma Dynamics","score":0.0005000000237487257,"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":0.00039999998989515007,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/ii-pegasi","display_name":"II Pegasi","score":0.9649999737739563},{"id":"https://openalex.org/keywords/star-spots","display_name":"stellar spots","score":0.7429999709129333},{"id":"https://openalex.org/keywords/stellar-surface-mapping","display_name":"stellar surface mapping","score":0.5839999914169312},{"id":"https://openalex.org/keywords/doppler-imaging","display_name":"Doppler imaging","score":0.8450000286102295},{"id":"https://openalex.org/keywords/active-regions","display_name":"active regions","score":0.8199999928474426},{"id":"https://openalex.org/keywords/spot-evolution","display_name":"spot evolution","score":0.5860000252723694},{"id":"https://openalex.org/keywords/stellar-activity-cycles","display_name":"stellar activity cycles","score":0.6460000276565552}],"concepts":[{"id":"https://openalex.org/C32161561","wikidata":"https://www.wikidata.org/wiki/Q1893536","display_name":"Starspot","level":3,"score":0.85205078125},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.8453311920166016},{"id":"https://openalex.org/C2780554747","wikidata":"https://www.wikidata.org/wiki/Q36477","display_name":"Longitude","level":3,"score":0.7799437642097473},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.6595355868339539},{"id":"https://openalex.org/C122523270","wikidata":"https://www.wikidata.org/wiki/Q34027","display_name":"Latitude","level":2,"score":0.6513936519622803},{"id":"https://openalex.org/C29705727","wikidata":"https://www.wikidata.org/wiki/Q294562","display_name":"Polar","level":2,"score":0.5128638744354248},{"id":"https://openalex.org/C2777252438","wikidata":"https://www.wikidata.org/wiki/Q41228","display_name":"Southern Hemisphere","level":2,"score":0.47099822759628296},{"id":"https://openalex.org/C54400483","wikidata":"https://www.wikidata.org/wiki/Q1793202","display_name":"PEG ratio","level":2,"score":0.45495903491973877},{"id":"https://openalex.org/C48372109","wikidata":"https://www.wikidata.org/wiki/Q3913","display_name":"Binary number","level":2,"score":0.4535742998123169},{"id":"https://openalex.org/C2778755073","wikidata":"https://www.wikidata.org/wiki/Q10858537","display_name":"Scale (ratio)","level":2,"score":0.4390503466129303},{"id":"https://openalex.org/C193786831","wikidata":"https://www.wikidata.org/wiki/Q50053","display_name":"Binary star","level":3,"score":0.4347118139266968},{"id":"https://openalex.org/C150846664","wikidata":"https://www.wikidata.org/wiki/Q7602306","display_name":"Stars","level":2,"score":0.4003846049308777},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.3340170383453369},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C94375191","wikidata":"https://www.wikidata.org/wiki/Q11205","display_name":"Arithmetic","level":1,"score":0.0},{"id":"https://openalex.org/C10138342","wikidata":"https://www.wikidata.org/wiki/Q43015","display_name":"Finance","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1051/0004-6361:20030671","doi":"https://doi.org/10.1051/0004-6361:20030671","is_oa":true,"landing_page_url":"https://doi.org/10.1051/0004-6361:20030671","pdf_url":"https://www.aanda.org/articles/aa/pdf/2003/26/aa3086.pdf","source":{"id":"https://openalex.org/S205231332","display_name":"Astronomy and Astrophysics","issn_l":"0004-6361","issn":["0004-6361","1432-0746"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-3","ki-jl-2","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319748","host_organization_name":"EDP Sciences","host_organization_lineage":["https://openalex.org/P4310319748","https://openalex.org/P4310319982"],"host_organization_lineage_names":["EDP Sciences","Science Press"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Astronomy & Astrophysics","raw_type":"journal-article"},{"id":"pmh:oai:edpsciences.org:dkey/10.1051/0004-6361:20030671","doi":null,"is_oa":true,"landing_page_url":"https://www.aanda.org/10.1051/0004-6361:20030671/pdf","pdf_url":"https://www.aanda.org/10.1051/0004-6361:20030671/pdf","source":{"id":"https://openalex.org/S4306400744","display_name":"Springer Link (Chiba Institute of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I8488066","host_organization_name":"Chiba Institute of Technology","host_organization_lineage":["https://openalex.org/I8488066"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"https://doi.org/10.1051/0004-6361:20030671","raw_type":"Text"}],"best_oa_location":{"id":"doi:10.1051/0004-6361:20030671","doi":"https://doi.org/10.1051/0004-6361:20030671","is_oa":true,"landing_page_url":"https://doi.org/10.1051/0004-6361:20030671","pdf_url":"https://www.aanda.org/articles/aa/pdf/2003/26/aa3086.pdf","source":{"id":"https://openalex.org/S205231332","display_name":"Astronomy and Astrophysics","issn_l":"0004-6361","issn":["0004-6361","1432-0746"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-a","jufo-3","ki-jl-2","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319748","host_organization_name":"EDP Sciences","host_organization_lineage":["https://openalex.org/P4310319748","https://openalex.org/P4310319982"],"host_organization_lineage_names":["EDP Sciences","Science Press"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Astronomy & Astrophysics","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2079924971.pdf","grobid_xml":"https://content.openalex.org/works/W2079924971.grobid-xml"},"referenced_works_count":8,"referenced_works":["https://openalex.org/W207112858","https://openalex.org/W1579240729","https://openalex.org/W1976991515","https://openalex.org/W2050918091","https://openalex.org/W2132301603","https://openalex.org/W2987890391","https://openalex.org/W4235905305","https://openalex.org/W4299671834"],"related_works":["https://openalex.org/W2144530299","https://openalex.org/W2167419105","https://openalex.org/W2951263193","https://openalex.org/W7098672644","https://openalex.org/W1638475759","https://openalex.org/W2041076729","https://openalex.org/W1978217106","https://openalex.org/W7101039330","https://openalex.org/W2096521908","https://openalex.org/W1665067632"],"abstract_inverted_index":{"By":[0],"means":[1],"of":[2,9,40,52,74],"Doppler":[3],"imaging,":[4],"new":[5],"high-resolution":[6],"spectroscopic":[7],"observations":[8],"II":[10,41,75],"Peg,":[11],"carried":[12],"out":[13],"in":[14,68,86,96,106,112],"three":[15,37],"observing":[16],"seasons":[17],"from":[18,109],"1999":[19,88],"to":[20,103],"2001,":[21],"were":[22,31,43],"analyzed.":[23],"The":[24,45,71,99],"lines":[25],"FeI6430.844":[26],"\u00c5":[27,30],"and":[28,36,62,89,94],"CaI6439.075":[29],"chosen":[32],"as":[33],"map":[34],"lines,":[35],"surface":[38,54,72],"maps":[39,55],"Peg":[42,76],"obtained.":[44],"results":[46],"demonstrate":[47],"that":[48],"the":[49,69,80,110,122],"main":[50],"features":[51],"these":[53],"are":[56],"high-latitude":[57],"active":[58,83,100],"regions":[59,84],"around":[60],"60\u00b0":[61],"no":[63],"polar":[64],"cap":[65],"is":[66,118],"seen":[67],"maps.":[70],"patterns":[73],"show":[77],"large":[78],"changes,":[79],"largest":[81],"scale":[82],"appear":[85],"July-Aug.":[87],"then":[90],"they":[91],"become":[92],"small":[93],"separated":[95],"Feb.":[97,113],"2000.":[98,114],"longitude":[101],"switches":[102],"another":[104],"hemisphere":[105],"Nov.-Dec.":[107],"2001":[108],"one":[111],"Such":[115],"spot":[116],"evolution":[117],"not":[119],"consistent":[120],"with":[121],"activity":[123],"cycle":[124],"derived":[125],"previously.":[126]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":2},{"year":2013,"cited_by_count":4}],"updated_date":"2026-11-12T12:28:57.059296","created_date":"2016-06-24T00:00:00"}