{"title":"The first study of the short period contact binary GY Psc","authors":"Bin Zhang , Yidan Gao","doi":"10.1016/j.newast.2025.102358","DOIUrl":null,"url":null,"abstract":"<div><div>In this paper, we present the first investigation of the short period eclipsing binary GY Psc. We find that GY Psc is a shallow W-subtype binary with a mass ratio of <span><math><mi>q</mi></math></span> = 2.522. We also find that its light curves show different O’Connell effect, which can be explained by the evolution of the cool star-spots. At the same time, the <span><math><mrow><mi>O</mi><mo>−</mo><mi>C</mi></mrow></math></span> diagram reveals a cyclic oscillation with a period of <span><math><mrow><mi>P</mi><mo>=</mo><mn>3</mn><mo>.</mo><mn>85</mn></mrow></math></span> years and an amplitude of 0.033883 days. The cyclic oscillation is interpreted as the light travel-time effect via the presence of a stellar black hole candidate. The minimum mass of the tertiary companion is estimated to be <span><math><msub><mrow><mi>M</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span> = 12.99 <span><math><msub><mrow><mi>M</mi></mrow><mrow><mo>⊙</mo></mrow></msub></math></span>. All the results reveal that GY Psc may be a triple system with active star-spot activity.</div></div>","PeriodicalId":54727,"journal":{"name":"New Astronomy","volume":"117 ","pages":"Article 102358"},"PeriodicalIF":1.9000,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Astronomy","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1384107625000077","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
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Abstract
In this paper, we present the first investigation of the short period eclipsing binary GY Psc. We find that GY Psc is a shallow W-subtype binary with a mass ratio of = 2.522. We also find that its light curves show different O’Connell effect, which can be explained by the evolution of the cool star-spots. At the same time, the diagram reveals a cyclic oscillation with a period of years and an amplitude of 0.033883 days. The cyclic oscillation is interpreted as the light travel-time effect via the presence of a stellar black hole candidate. The minimum mass of the tertiary companion is estimated to be = 12.99 . All the results reveal that GY Psc may be a triple system with active star-spot activity.
期刊介绍：
New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation.
New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.
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