{"id":"https://openalex.org/W7225454909","doi":"https://doi.org/10.1051/0004-6361/202662585","title":"Coherent radio emission at 45 MHz from the nearby planet-hosting star GJ 725A","display_name":"Coherent radio emission at 45 MHz from the nearby planet-hosting star GJ 725A","publication_year":2026,"publication_date":"2026-11-07","ids":{"openalex":"https://openalex.org/W7225454909","doi":"https://doi.org/10.1051/0004-6361/202662585"},"language":"en","primary_location":{"id":"doi:10.1051/0004-6361/202662585","doi":"https://doi.org/10.1051/0004-6361/202662585","is_oa":true,"landing_page_url":"https://doi.org/10.1051/0004-6361/202662585","pdf_url":null,"source":{"id":"https://openalex.org/S205231332","display_name":"Astronomy and Astrophysics","issn_l":"0004-6361","issn":["0004-6361","1432-0746"],"is_oa":true,"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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Astronomy &amp; Astrophysics","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/10.1051/0004-6361/202662585","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5034250621","display_name":"H. W. Edler","orcid":"https://orcid.org/0000-0002-4526-4806","observed_orcids":["https://orcid.org/0000-0002-4526-4806"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"H. W. Edler","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5013504450","display_name":"J. R. Callingham","orcid":"https://orcid.org/0000-0002-7167-1819","observed_orcids":["https://orcid.org/0000-0002-7167-1819"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"J. R. Callingham","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5161238485","display_name":"I. Davis","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"I. Davis","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5161211913","display_name":"C. Cordun","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"C. Cordun","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5161242390","display_name":"F. de Gasperin","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"F. de Gasperin","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5161202956","display_name":"H. L. Le","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"H. L. Le","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5161201503","display_name":"B. J. S. Pope","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"B. J. S. Pope","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5023402370","display_name":"Harish K. Vedantham","orcid":"https://orcid.org/0000-0002-0872-181X","observed_orcids":["https://orcid.org/0000-0002-0872-181X"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"H. K. Vedantham","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5061236229","display_name":"Reinout J. van Weeren","orcid":"https://orcid.org/0000-0002-0587-1660","observed_orcids":["https://orcid.org/0000-0002-0587-1660"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. J. van Weeren","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5161172703","display_name":"P. Zarka","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"P. Zarka","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":1650,"currency":"EUR","value_usd":1865},"apc_paid":{"value":1650,"currency":"EUR","value_usd":1865},"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.0,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.8544999957084656,"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":0.8544999957084656,"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/T12450","display_name":"Radio Astronomy Observations and Technology","score":0.0731000006198883,"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/T10463","display_name":"Pulsars and Gravitational Waves Research","score":0.010700000450015068,"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/coherent-radio-emission","display_name":"coherent radio emission","score":0.9010000228881836},{"id":"https://openalex.org/keywords/circular-polarization","display_name":"circular polarization","score":0.597000002861023},{"id":"https://openalex.org/keywords/electron-cyclotron-maser-instability","display_name":"electron cyclotron maser instability","score":0.9139999747276306},{"id":"https://openalex.org/keywords/m-dwarfs","display_name":"M dwarfs","score":0.6460000276565552},{"id":"https://openalex.org/keywords/stellar-magnetic-fields","display_name":"stellar magnetic fields","score":0.5820000171661377},{"id":"https://openalex.org/keywords/planetary-magnetic-fields","display_name":"planetary magnetic fields","score":0.7099999785423279},{"id":"https://openalex.org/keywords/auroral-emission","display_name":"auroral emission","score":0.9319999814033508},{"id":"https://openalex.org/keywords/space-weather","display_name":"space weather","score":0.5839999914169312}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.9555000066757202},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.7641000151634216},{"id":"https://openalex.org/C2780590096","wikidata":"https://www.wikidata.org/wiki/Q104528246","display_name":"LOFAR","level":3,"score":0.633899986743927},{"id":"https://openalex.org/C46061668","wikidata":"https://www.wikidata.org/wiki/Q487875","display_name":"Maser","level":2,"score":0.5692999958992004},{"id":"https://openalex.org/C205049153","wikidata":"https://www.wikidata.org/wiki/Q2698605","display_name":"Polarization (electrochemistry)","level":2,"score":0.5626999735832214},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.5526999831199646},{"id":"https://openalex.org/C125245961","wikidata":"https://www.wikidata.org/wiki/Q221656","display_name":"Brightness","level":2,"score":0.5181999802589417},{"id":"https://openalex.org/C115260700","wikidata":"https://www.wikidata.org/wiki/Q11408","display_name":"Magnetic field","level":2,"score":0.515999972820282},{"id":"https://openalex.org/C153201621","wikidata":"https://www.wikidata.org/wiki/Q5121676","display_name":"Circular polarization","level":3,"score":0.4984999895095825},{"id":"https://openalex.org/C53802167","wikidata":"https://www.wikidata.org/wiki/Q4538627","display_name":"Brightness temperature","level":3,"score":0.4496000111103058},{"id":"https://openalex.org/C51244244","wikidata":"https://www.wikidata.org/wiki/Q634","display_name":"Planet","level":2,"score":0.44029998779296875},{"id":"https://openalex.org/C164546044","wikidata":"https://www.wikidata.org/wiki/Q285400","display_name":"Flare star","level":5,"score":0.3765999972820282},{"id":"https://openalex.org/C73329638","wikidata":"https://www.wikidata.org/wiki/Q527","display_name":"Sky","level":2,"score":0.34709998965263367},{"id":"https://openalex.org/C150143219","wikidata":"https://www.wikidata.org/wiki/Q4306","display_name":"Radio astronomy","level":2,"score":0.34619998931884766},{"id":"https://openalex.org/C107190969","wikidata":"https://www.wikidata.org/wiki/Q6553479","display_name":"Linear polarization","level":3,"score":0.3424000144004822},{"id":"https://openalex.org/C88991977","wikidata":"https://www.wikidata.org/wiki/Q6464","display_name":"Stellar rotation","level":3,"score":0.31290000677108765},{"id":"https://openalex.org/C161813005","wikidata":"https://www.wikidata.org/wiki/Q184356","display_name":"Radio telescope","level":2,"score":0.31220000982284546},{"id":"https://openalex.org/C2777371749","wikidata":"https://www.wikidata.org/wiki/Q25377588","display_name":"Late-type star","level":4,"score":0.3059000074863434},{"id":"https://openalex.org/C44128863","wikidata":"https://www.wikidata.org/wiki/Q2282122","display_name":"Cyclotron radiation","level":4,"score":0.2969000041484833},{"id":"https://openalex.org/C162635859","wikidata":"https://www.wikidata.org/wiki/Q6449","display_name":"Stellar magnetic field","level":5,"score":0.2955999970436096},{"id":"https://openalex.org/C168589115","wikidata":"https://www.wikidata.org/wiki/Q3079618","display_name":"Stellar mass","level":4,"score":0.28060001134872437},{"id":"https://openalex.org/C32161561","wikidata":"https://www.wikidata.org/wiki/Q1893536","display_name":"Starspot","level":3,"score":0.2721000015735626},{"id":"https://openalex.org/C96141758","wikidata":"https://www.wikidata.org/wiki/Q216817","display_name":"Emission spectrum","level":3,"score":0.26489999890327454},{"id":"https://openalex.org/C68271606","wikidata":"https://www.wikidata.org/wiki/Q625648","display_name":"Photometry (optics)","level":3,"score":0.2632000148296356},{"id":"https://openalex.org/C42061751","wikidata":"https://www.wikidata.org/wiki/Q2280060","display_name":"Spectral index","level":3,"score":0.2549000084400177},{"id":"https://openalex.org/C108884401","wikidata":"https://www.wikidata.org/wiki/Q6372","display_name":"Photosphere","level":3,"score":0.2547999918460846},{"id":"https://openalex.org/C4839761","wikidata":"https://www.wikidata.org/wiki/Q212111","display_name":"Spectral line","level":2,"score":0.25360000133514404},{"id":"https://openalex.org/C25227350","wikidata":"https://www.wikidata.org/wiki/Q201805","display_name":"Zeeman effect","level":3,"score":0.250900000333786}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1051/0004-6361/202662585","doi":"https://doi.org/10.1051/0004-6361/202662585","is_oa":true,"landing_page_url":"https://doi.org/10.1051/0004-6361/202662585","pdf_url":null,"source":{"id":"https://openalex.org/S205231332","display_name":"Astronomy and Astrophysics","issn_l":"0004-6361","issn":["0004-6361","1432-0746"],"is_oa":true,"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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Astronomy &amp; Astrophysics","raw_type":"journal-article"},{"id":"pmh:oai:arXiv.org:2611.08719","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2611.08719","pdf_url":"https://arxiv.org/pdf/2611.08719","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":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2611.08719","doi":"https://doi.org/10.48550/arxiv.2611.08719","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2611.08719","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":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"doi:10.1051/0004-6361/202662585","doi":"https://doi.org/10.1051/0004-6361/202662585","is_oa":true,"landing_page_url":"https://doi.org/10.1051/0004-6361/202662585","pdf_url":null,"source":{"id":"https://openalex.org/S205231332","display_name":"Astronomy and Astrophysics","issn_l":"0004-6361","issn":["0004-6361","1432-0746"],"is_oa":true,"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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Astronomy &amp; Astrophysics","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W3006383612","https://openalex.org/W4404424635","https://openalex.org/W4214665713","https://openalex.org/W3040778390","https://openalex.org/W6948449851","https://openalex.org/W3100853524","https://openalex.org/W3200230854","https://openalex.org/W6926523570","https://openalex.org/W3016348026","https://openalex.org/W3111997158"],"abstract_inverted_index":{"Ultralow-frequency":[0,241],"(\u03bd<100,MHz)":[1],"coherent":[2],"radio":[3],"emission":[4,179,210],"from":[5],"exoplanet-hosting":[6],"stellar":[7,14,160,238],"systems":[8],"carries":[9],"information":[10,25],"about":[11],"planetary":[12],"and":[13,102,117,141,175,253,255],"magnetic":[15,220,239],"fields":[16],"as":[17,19],"well":[18],"the":[20,37,44,55,78,108,154,178,185,198,202,226,250,267],"space":[21,271],"weather":[22],"environment":[23],"--":[24],"that":[26,74],"is":[27,75,180],"difficult":[28],"to":[29,129,184,196,237,275],"obtain":[30],"at":[31,84,133],"other":[32],"wavelengths.":[33],"We":[34,204],"carried":[35],"out":[36],"circularly":[38,47],"polarized":[39,48],"LOFAR":[40,56],"LBA":[41],"Sky":[42],"Survey,":[43],"most":[45,181],"sensitive":[46],"survey":[49],"in":[50,70,107,249],"this":[51,63],"frequency":[52],"range,":[53,110],"using":[54],"low-band":[57],"antenna":[58],"system.":[59,161],"As":[60],"part":[61],"of":[62,87,97,116,121,132,137,158,201,211,262],"untargeted":[64],"search,":[65],"we":[66],"detected":[67],"a":[68,71,85,92,112,118,130,135,143,159,212,219,256,259],"signal":[69,90],"1,h":[72],"observation":[73],"coincident":[76],"with":[77,111,218,225,244],"quiescent,":[79],"planet-hosting,":[80],"solar-neighborhood":[81],"M,dwarf":[82],"GJ,725A":[83],"distance":[86],"3.5,pc.":[88],"The":[89,190],"has":[91],"high":[93,165],"circular":[94],"polarization":[95,176],"fraction":[96],"74":[98],"=135":[99],"between":[100,277],"42,MHz":[101],"50,MHz.":[103,150],"It":[104],"was":[105],"undetected":[106,214],"50--66,MHz":[109],"3\u03c3":[113],"upper":[114],"limit":[115],"peak":[119],"brightness":[120,167],"B_":[122],"I,46":[123],"-1":[124,170],"I,58":[125],"<48,":[126],",":[127],"corresponding":[128],"drop":[131],"least":[134],"factor":[136],"\u223c3":[138],"across":[139,266],"12,MHz":[140],"indicating":[142],"strong":[144],"spectral":[145],"feature":[146],"or":[147,233],"cutoff":[148],"around":[149],"Our":[151],"detection":[152,157],"represents":[153],"lowest-frequency":[155],"confirmed":[156],"Based":[162],"on":[163],"its":[164],"estimated":[166],"temperature":[168],"(\u223c10^":[169],"14":[171],",K),":[172],"transient":[173],"character,":[174],"fraction,":[177],"plausibly":[182],"attributed":[183],"electron":[186],"cyclotron":[187],"maser":[188],"instability.":[189],"available":[191],"observations":[192,248],"are":[193],"not":[194],"sufficient":[195],"identify":[197],"astrophysical":[199],"origin":[200,235],"emission.":[203],"consider":[205],"three":[206],"plausible":[207],"scenarios:":[208],"auroral":[209],"yet":[213],"wide-orbit":[215,260],"giant":[216,264],"planet":[217,231,265],"field":[221],"B":[222],"star-planet":[223],"interaction":[224],"known":[227],"11,d":[228],"orbit":[229],"terrestrial":[230],"GJ,725Ab,":[232],"an":[234],"due":[236],"activity.":[240],"monitoring,":[242],"combined":[243],"new,":[245],"preferably":[246],"simultaneous":[247],"X-ray,":[251],"UV,":[252],"H\u03b1":[254],"search":[257],"for":[258],"(thousands":[261],"days)":[263],"full,":[268],"permitted":[269],"parameter":[270],"will":[272],"allow":[273],"us":[274],"distinguish":[276],"these":[278],"scenarios.":[279]},"counts_by_year":[],"updated_date":"2026-11-11T12:16:26.678958","created_date":"2026-11-08T00:00:00"}