{"id":"https://openalex.org/W2914969858","doi":"https://doi.org/10.3847/1538-3881/aaf868","title":"Photometric and Spectral Observations of the W UMa Stars NSVS 4161544 and 1SWASP J034501.24+493659.9. GAIA Challenges","display_name":"Photometric and Spectral Observations of the W UMa Stars NSVS 4161544 and 1SWASP J034501.24+493659.9. GAIA Challenges","publication_year":2019,"publication_date":"2019-01-25","ids":{"openalex":"https://openalex.org/W2914969858","doi":"https://doi.org/10.3847/1538-3881/aaf868","mag":"2914969858"},"language":"en","primary_location":{"id":"doi:10.3847/1538-3881/aaf868","doi":"https://doi.org/10.3847/1538-3881/aaf868","is_oa":true,"landing_page_url":"https://doi.org/10.3847/1538-3881/aaf868","pdf_url":"https://iopscience.iop.org/article/10.3847/1538-3881/aaf868/pdf","source":{"id":"https://openalex.org/S100695177","display_name":"The Astronomical Journal","issn_l":"0004-6256","issn":["0004-6256","1538-3881"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","dongbi-b","jufo-1","norway-1","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310311669","host_organization_name":"Institute of Physics","host_organization_lineage":["https://openalex.org/P4310311669"],"host_organization_lineage_names":["Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Astronomical Journal","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://iopscience.iop.org/article/10.3847/1538-3881/aaf868/pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5044792701","display_name":"Diana Petrova Kjurkchieva","orcid":"https://orcid.org/0000-0003-4371-8074","observed_orcids":["https://orcid.org/0000-0003-4371-8074"]},"institutions":[{"id":"https://openalex.org/I39995536","display_name":"Shumen University","ror":"https://ror.org/03yht3k11","country_code":"BG","type":"education","lineage":["https://openalex.org/I39995536"]}],"countries":["BG"],"is_corresponding":false,"raw_author_name":"Diana Kjurkchieva","raw_affiliation_strings":["Department of Physics and Astronomy, Shumen University, 9700 Shumen, Bulgaria"],"raw_orcid":"https://orcid.org/0000-0003-4371-8074","affiliations":[{"raw_affiliation_string":"Department of Physics and Astronomy, Shumen University, 9700 Shumen, Bulgaria","institution_ids":["https://openalex.org/I39995536"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5061356190","display_name":"\u0418. \u0421\u0442\u0430\u0442\u0435\u0432\u0430","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I24768866","display_name":"Bulgarian Academy of Sciences","ror":"https://ror.org/01x8hew03","country_code":"BG","type":"government","lineage":["https://openalex.org/I24768866"]},{"id":"https://openalex.org/I4210120893","display_name":"Institute of Astronomy and National Astronomical Observatory","ror":"https://ror.org/02s2qpg90","country_code":"BG","type":"facility","lineage":["https://openalex.org/I4210120893"]}],"countries":["BG"],"is_corresponding":false,"raw_author_name":"Ivanka Stateva","raw_affiliation_strings":["Institute of Astronomy and NAO, Bulgarian Academy of Sciences, Tsarigradsko shossee 72, 1784 Sofia, Bulgaria"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Astronomy and NAO, Bulgarian Academy of Sciences, Tsarigradsko shossee 72, 1784 Sofia, Bulgaria","institution_ids":["https://openalex.org/I24768866","https://openalex.org/I4210120893"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008057645","display_name":"Velimir Angelov Popov","orcid":"https://orcid.org/0000-0003-1415-9525","observed_orcids":["https://orcid.org/0000-0003-1415-9525"]},"institutions":[{"id":"https://openalex.org/I39995536","display_name":"Shumen University","ror":"https://ror.org/03yht3k11","country_code":"BG","type":"education","lineage":["https://openalex.org/I39995536"]}],"countries":["BG"],"is_corresponding":false,"raw_author_name":"Velimir A. Popov","raw_affiliation_strings":["Department of Physics and Astronomy, Shumen University, 9700 Shumen, Bulgaria"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics and Astronomy, Shumen University, 9700 Shumen, Bulgaria","institution_ids":["https://openalex.org/I39995536"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5087563253","display_name":"Dragomir V. Marchev","orcid":"https://orcid.org/0000-0001-6394-1121","observed_orcids":["https://orcid.org/0000-0001-6394-1121"]},"institutions":[{"id":"https://openalex.org/I39995536","display_name":"Shumen University","ror":"https://ror.org/03yht3k11","country_code":"BG","type":"education","lineage":["https://openalex.org/I39995536"]}],"countries":["BG"],"is_corresponding":false,"raw_author_name":"Dragomir Marchev","raw_affiliation_strings":["Department of Physics and Astronomy, Shumen University, 9700 Shumen, Bulgaria"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics and Astronomy, Shumen University, 9700 Shumen, Bulgaria","institution_ids":["https://openalex.org/I39995536"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":4499,"currency":"USD","value_usd":4499},"apc_paid":null,"fwci":0.6154,"has_fulltext":true,"cited_by_count":12,"citation_normalized_percentile":{"value":0.66360936,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":87,"max":97},"biblio":{"volume":"157","issue":"2","first_page":"73","last_page":"73"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.9990000128746033,"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":0.9990000128746033,"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/T10744","display_name":"Astrophysical Phenomena and Observations","score":0.00039999998989515007,"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":0.0003000000142492354,"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/w-uma-type-contact-binary","display_name":"W UMa-type contact binary","score":0.8429999947547913},{"id":"https://openalex.org/keywords/light-curves","display_name":"light curves","score":0.5920000076293945},{"id":"https://openalex.org/keywords/radial-velocity-curves","display_name":"radial velocity curves","score":0.8740000128746033},{"id":"https://openalex.org/keywords/orbital-elements","display_name":"orbital elements","score":0.4959999918937683},{"id":"https://openalex.org/keywords/stellar-mass-and-radius","display_name":"stellar masses and radii","score":0.777999997138977},{"id":"https://openalex.org/keywords/interstellar-extinction","display_name":"interstellar extinction","score":0.7480000257492065},{"id":"https://openalex.org/keywords/gaia-dr3","display_name":"Gaia DR3","score":0.47200000286102295}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.9600282907485962},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.7913462519645691},{"id":"https://openalex.org/C188232333","wikidata":"https://www.wikidata.org/wiki/Q2406056","display_name":"Mass ratio","level":2,"score":0.5689968466758728},{"id":"https://openalex.org/C101991246","wikidata":"https://www.wikidata.org/wiki/Q5422078","display_name":"Extinction (optical mineralogy)","level":2,"score":0.48889079689979553},{"id":"https://openalex.org/C150846664","wikidata":"https://www.wikidata.org/wiki/Q7602306","display_name":"Stars","level":2,"score":0.4732915759086609},{"id":"https://openalex.org/C130726490","wikidata":"https://www.wikidata.org/wiki/Q675076","display_name":"Light curve","level":2,"score":0.4674936830997467},{"id":"https://openalex.org/C41074950","wikidata":"https://www.wikidata.org/wiki/Q240105","display_name":"Radial velocity","level":3,"score":0.4483102262020111},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.3721608519554138},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.3847/1538-3881/aaf868","doi":"https://doi.org/10.3847/1538-3881/aaf868","is_oa":true,"landing_page_url":"https://doi.org/10.3847/1538-3881/aaf868","pdf_url":"https://iopscience.iop.org/article/10.3847/1538-3881/aaf868/pdf","source":{"id":"https://openalex.org/S100695177","display_name":"The Astronomical Journal","issn_l":"0004-6256","issn":["0004-6256","1538-3881"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","dongbi-b","jufo-1","norway-1","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310311669","host_organization_name":"Institute of Physics","host_organization_lineage":["https://openalex.org/P4310311669"],"host_organization_lineage_names":["Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Astronomical Journal","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.3847/1538-3881/aaf868","doi":"https://doi.org/10.3847/1538-3881/aaf868","is_oa":true,"landing_page_url":"https://doi.org/10.3847/1538-3881/aaf868","pdf_url":"https://iopscience.iop.org/article/10.3847/1538-3881/aaf868/pdf","source":{"id":"https://openalex.org/S100695177","display_name":"The Astronomical Journal","issn_l":"0004-6256","issn":["0004-6256","1538-3881"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","dongbi-b","jufo-1","norway-1","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310311669","host_organization_name":"Institute of Physics","host_organization_lineage":["https://openalex.org/P4310311669"],"host_organization_lineage_names":["Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Astronomical Journal","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G110529023","display_name":null,"funder_award_id":"RD-08-112/2018","funder_id":"https://openalex.org/F4320330331","funder_display_name":"Constantine of Preslav University of Shumen"}],"funders":[{"id":"https://openalex.org/F4320306101","display_name":"National Aeronautics and Space Administration","ror":"https://ror.org/027ka1x80"},{"id":"https://openalex.org/F4320318240","display_name":"European Space Agency","ror":"https://ror.org/03wd9za21"},{"id":"https://openalex.org/F4320323575","display_name":"Bulgarian Academy of Sciences","ror":"https://ror.org/01x8hew03"},{"id":"https://openalex.org/F4320326548","display_name":"Masarykova Univerzita","ror":"https://ror.org/02j46qs45"},{"id":"https://openalex.org/F4320330331","display_name":"Constantine of Preslav University of Shumen","ror":"https://ror.org/03yht3k11"},{"id":"https://openalex.org/F4320338036","display_name":"Astrophysics Division","ror":"https://ror.org/021z1wf35"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2914969858.pdf","grobid_xml":"https://content.openalex.org/works/W2914969858.grobid-xml"},"referenced_works_count":24,"referenced_works":["https://openalex.org/W1643484380","https://openalex.org/W1661200856","https://openalex.org/W1964693361","https://openalex.org/W1992218070","https://openalex.org/W2006842939","https://openalex.org/W2036406818","https://openalex.org/W2076236953","https://openalex.org/W2095344000","https://openalex.org/W2103939178","https://openalex.org/W2105401321","https://openalex.org/W2106873657","https://openalex.org/W2119387732","https://openalex.org/W2159691951","https://openalex.org/W2160739252","https://openalex.org/W2161695261","https://openalex.org/W2564484065","https://openalex.org/W2798336535","https://openalex.org/W2798430172","https://openalex.org/W2963935389","https://openalex.org/W3016972341","https://openalex.org/W3030339314","https://openalex.org/W3098772469","https://openalex.org/W3099322629","https://openalex.org/W4255135604"],"related_works":["https://openalex.org/W2889508162","https://openalex.org/W2792860762","https://openalex.org/W2996839755","https://openalex.org/W2792934404","https://openalex.org/W2895433629","https://openalex.org/W2797404345","https://openalex.org/W2345774615","https://openalex.org/W3208323643","https://openalex.org/W2508025113","https://openalex.org/W2898726586"],"abstract_inverted_index":{"Abstract":[0],"Photometric":[1],"and":[2,12,26,37,66,77,87,97,126,137,147,157,179],"spectral":[3],"observations":[4],"of":[5,17,46,106,166,182,191,202,215,232],"the":[6,31,164,167,175,187,196,222,233,240],"W":[7],"UMa":[8],"binaries":[9],"NSVS":[10,47,203],"4161544":[11,48,204],"1SWASP":[13,107,168,216],"J034501.24+493659.9":[14,108,169,217],"with":[15,207],"periods":[16],"around":[18],"8":[19],"hr":[20],"are":[21,171],"presented.":[22],"The":[23,43,103,199,212],"simultaneous":[24],"light-curve":[25],"radial-velocity-curve":[27],"solutions":[28],"revealed":[29],"that":[30,208,225],"two":[32],"targets":[33],"have":[34],"over-contact":[35],"configurations,":[36],"their":[38,180],"components":[39,170],"undergo":[40],"partial":[41],"eclipses.":[42],"derived":[44,104],"parameters":[45,105],"are:":[49,109],"mass":[50,110,189],"ratio":[51,111],"q":[52,112],"=":[53,58,63,69,75,80,85,90,95,100,113,118,123,129,135,140,145,150,155,160],"3.377,":[54],"orbital":[55,115],"inclination":[56,116],"i":[57,117],"65.00,":[59],"temperatures":[60,120],"T":[61,67,121,127],"1":[62,74,84,94,122,134,144,154],"6016":[64],"K":[65,125],"2":[68,79,89,99,128,139,149,159],"5726":[70],"K,":[71,131],"masses":[72,132,165],"M":[73,78,133,138,193],"0.43":[76],"1.47":[81],"radii":[82,142],"R":[83,88,143,148],"0.74":[86],"1.28":[91],"luminosities":[92,152],"L":[93,98,153,158],"0.64":[96],"1.51":[101],".":[102,162],"2.378,":[114],"60.30,":[119],"6514":[124],"6494":[130],"0.275":[136],"0.654":[141],"0.693":[146],"1.012":[151],"0.775":[156],"1.632":[161],"Hence,":[163],"quite":[172],"small":[173],"for":[174,195],"rest":[176],"global":[177],"parameters,":[178],"sum":[181],"0.93":[183],"is":[184,218,226],"slightly":[185],"below":[186],"lower":[188],"limit":[190],"1.0\u20131.2":[192],"\u2299":[194],"contact":[197],"binaries.":[198],"calculated":[200,213],"distance":[201,214],"almost":[205],"coincides":[206],"determined":[209],"by":[210],"GAIA.":[211],"considerably":[219],"smaller":[220],"than":[221],"GAIA":[223],"value":[224],"most":[227],"likely":[228],"due":[229],"to":[230,236],"overestimation":[231],"interstellar":[234],"extinction":[235],"this":[237],"star":[238],"from":[239],"Galactic":[241],"disk.":[242]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":3},{"year":2019,"cited_by_count":1}],"updated_date":"2026-10-16T09:59:22.235173","created_date":"2019-02-21T00:00:00"}
