新发现的wuma恒星WISEJ004327.7+722407和WISEJ234557.8+510456的全局参数

IF 0.8 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Serbian Astronomical Journal Pub Date : 2020-01-01 DOI:10.2298/saj2000019k

D. Kjurkchieva, S. Ibryamov

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引用次数: 0

摘要

本文介绍了新发现的wuma恒星WISEJ004327.7+722407和WISEJ234557.8+510456在g'和i'波段的光度观测结果。两个目标均为浅接触构型，组分均为G{K谱型。我们发现WISEJ004327.7+722407为A亚型，WISEJ234557.8+510456为W亚型。不同的光水平在正交是由较大的组件上的冷点再现。利用光曲线解和GAIA距离计算食双星全局参数的方法，对深食星进行了改进。获得的全局参数显示，与具有相同质量的MS恒星相比，WISEJ004327.7+722407和WISEJ234557.8+510456的至少一个组成部分过大，过亮且过热。

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Global parameters of the newly-discovered W UMa stars WISEJ004327.7+722407 and WISEJ234557.8+510456

Photometric observations in g' and i' bands of the newly-discovered W UMa stars WISEJ004327.7+722407 and WISEJ234557.8+510456 are presented. The two targets are with shallow-contact configurations and their components are of G{K spectral type. We found that WISEJ004327.7+722407 is of A subtype while WISEJ234557.8+510456 is of W subtype. The different light levels at the quadratures were reproduced by cool spots on the bigger components. The procedure for calculation of the global parameters of eclipsing binaries by light curve solutions and GAIA distances was refined for stars with deep eclipses. The obtained global parameters reveal that at least one of the components of WISEJ004327.7+722407 and WISEJ234557.8+510456 is oversized, overluminous and too hot compared with an MS star with the same mass.

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来源期刊

Serbian Astronomical Journal ASTRONOMY & ASTROPHYSICS-

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： Serbian Astronomical Journal publishes original observations and researches in all branches of astronomy. The journal publishes: Invited Reviews - review article on some up-to-date topic in astronomy, astrophysics and related fields (written upon invitation only), Original Scientific Papers - article in which are presented previously unpublished author''s own scientific results, Preliminary Reports - original scientific paper, but shorter in length and of preliminary nature, Professional Papers - articles offering experience useful for the improvement of professional practice i.e. article describing methods and techniques, software, presenting observational data, etc. In some cases the journal may publish other contributions, such as In Memoriam notes, Obituaries, Book Reviews, as well as Editorials, Addenda, Errata, Corrigenda, Retraction notes, etc.