{"title":"低质量近邻双星 KIC 7671594 共转纬度附近的半稳定活动区","authors":"N. Ö. Kaya, H. A. Dal","doi":"10.1002/asna.20240115","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>We present the new findings from the light variation of KIC 7671594. We have analyzed the light curve of the system, which is likely a low-mass eclipsing close binary. We have detected a spotted active region migration on the active component. This spotted active region on the stellar surface appears to be stable during the first 2.70 years, but it exhibits rapid migration during the last 0.85 years of the observing season. The OPEA model was derived using 1128 flares and their corresponding parameters. In the model, the <span></span><math>\n <semantics>\n <mrow>\n <mtext>Plateau</mtext>\n </mrow>\n <annotation>$$ Plateau $$</annotation>\n </semantics></math> value was found to be 2.46703 ± 0.25234 s, and the <span></span><math>\n <semantics>\n <mrow>\n <mtext>half</mtext>\n <mo>−</mo>\n <mtext>life</mtext>\n </mrow>\n <annotation>$$ half- life $$</annotation>\n </semantics></math> was calculated as 7332.28 s. The flare <span></span><math>\n <semantics>\n <mrow>\n <msub>\n <mi>N</mi>\n <mn>1</mn>\n </msub>\n </mrow>\n <annotation>$$ {N}_1 $$</annotation>\n </semantics></math> frequency was determined to be 0.03719 <span></span><math>\n <semantics>\n <mrow>\n <msup>\n <mi>h</mi>\n <mrow>\n <mo>−</mo>\n <mn>1</mn>\n </mrow>\n </msup>\n </mrow>\n <annotation>$$ {h}^{-1} $$</annotation>\n </semantics></math>, while <span></span><math>\n <semantics>\n <mrow>\n <msub>\n <mi>N</mi>\n <mn>2</mn>\n </msub>\n </mrow>\n <annotation>$$ {N}_2 $$</annotation>\n </semantics></math> was found to be 0.00028. We have concluded that KIC 7671594 is likely a low-mass eclipsing binary system with a main sequence component that possesses an active region covered by some cool spots around its co-rotation latitude.</p>\n </div>","PeriodicalId":55442,"journal":{"name":"Astronomische Nachrichten","volume":"345 9-10","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Semi-Stable Active Region Around the Co-Rotation Latitude of Low-Mass Close Binary KIC 7671594\",\"authors\":\"N. Ö. Kaya, H. A. Dal\",\"doi\":\"10.1002/asna.20240115\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>We present the new findings from the light variation of KIC 7671594. We have analyzed the light curve of the system, which is likely a low-mass eclipsing close binary. We have detected a spotted active region migration on the active component. This spotted active region on the stellar surface appears to be stable during the first 2.70 years, but it exhibits rapid migration during the last 0.85 years of the observing season. The OPEA model was derived using 1128 flares and their corresponding parameters. In the model, the <span></span><math>\\n <semantics>\\n <mrow>\\n <mtext>Plateau</mtext>\\n </mrow>\\n <annotation>$$ Plateau $$</annotation>\\n </semantics></math> value was found to be 2.46703 ± 0.25234 s, and the <span></span><math>\\n <semantics>\\n <mrow>\\n <mtext>half</mtext>\\n <mo>−</mo>\\n <mtext>life</mtext>\\n </mrow>\\n <annotation>$$ half- life $$</annotation>\\n </semantics></math> was calculated as 7332.28 s. The flare <span></span><math>\\n <semantics>\\n <mrow>\\n <msub>\\n <mi>N</mi>\\n <mn>1</mn>\\n </msub>\\n </mrow>\\n <annotation>$$ {N}_1 $$</annotation>\\n </semantics></math> frequency was determined to be 0.03719 <span></span><math>\\n <semantics>\\n <mrow>\\n <msup>\\n <mi>h</mi>\\n <mrow>\\n <mo>−</mo>\\n <mn>1</mn>\\n </mrow>\\n </msup>\\n </mrow>\\n <annotation>$$ {h}^{-1} $$</annotation>\\n </semantics></math>, while <span></span><math>\\n <semantics>\\n <mrow>\\n <msub>\\n <mi>N</mi>\\n <mn>2</mn>\\n </msub>\\n </mrow>\\n <annotation>$$ {N}_2 $$</annotation>\\n </semantics></math> was found to be 0.00028. We have concluded that KIC 7671594 is likely a low-mass eclipsing binary system with a main sequence component that possesses an active region covered by some cool spots around its co-rotation latitude.</p>\\n </div>\",\"PeriodicalId\":55442,\"journal\":{\"name\":\"Astronomische Nachrichten\",\"volume\":\"345 9-10\",\"pages\":\"\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2024-12-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Astronomische Nachrichten\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/asna.20240115\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ASTRONOMY & ASTROPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astronomische Nachrichten","FirstCategoryId":"101","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/asna.20240115","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
Semi-Stable Active Region Around the Co-Rotation Latitude of Low-Mass Close Binary KIC 7671594
We present the new findings from the light variation of KIC 7671594. We have analyzed the light curve of the system, which is likely a low-mass eclipsing close binary. We have detected a spotted active region migration on the active component. This spotted active region on the stellar surface appears to be stable during the first 2.70 years, but it exhibits rapid migration during the last 0.85 years of the observing season. The OPEA model was derived using 1128 flares and their corresponding parameters. In the model, the value was found to be 2.46703 ± 0.25234 s, and the was calculated as 7332.28 s. The flare frequency was determined to be 0.03719 , while was found to be 0.00028. We have concluded that KIC 7671594 is likely a low-mass eclipsing binary system with a main sequence component that possesses an active region covered by some cool spots around its co-rotation latitude.
期刊介绍：
Astronomische Nachrichten, founded in 1821 by H. C. Schumacher, is the oldest astronomical journal worldwide still being published. Famous astronomical discoveries and important papers on astronomy and astrophysics published in more than 300 volumes of the journal give an outstanding representation of the progress of astronomical research over the last 180 years. Today, Astronomical Notes/ Astronomische Nachrichten publishes articles in the field of observational and theoretical astrophysics and related topics in solar-system and solar physics. Additional, papers on astronomical instrumentation ground-based and space-based as well as papers about numerical astrophysical techniques and supercomputer modelling are covered. Papers can be completed by short video sequences in the electronic version. Astronomical Notes/ Astronomische Nachrichten also publishes special issues of meeting proceedings.
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