系外行星HAT-P-54b和WASP-153b的新观测和凌日解

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

Serbian Astronomical Journal Pub Date : 2019-01-01 DOI:10.2298/saj181022002k

D. Kjurkchieva, N. Petrov, S. Ibryamov

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引用次数: 0

摘要

我们用Rozhen 2米望远镜对新发现的凌日系外行星HAT-P-54b和WASP-153b进行了光度观测。结果，我们改善了她们的月经。新的凌日模型得出的轨道倾角和恒星半径值与第一次公布的值几乎相同，而行星半径略有不同:HAT-P-54b的半径更大，WASP-153b的半径更小。WASP-153b更膨胀的本质是由于其相当近的轨道和较高的恒星温度。我们计算的WASP-153距离与GAIA测量的非常接近。新观测到的HAT-P-54b和WASP-153b凌日的最佳拟合符合其主星的二次臂暗律，其系数已确定。我们的结果证实了这两个目标的热木星性质。

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New observations and transit solutions of the exoplanets HAT-P-54b and WASP-153b

We present photometric observations of the newly-discovered transiting exoplanets HAT-P-54b and WASP-153b with the Rozhen 2 m telescope. As a result we improved their periods. The modeling of the new transits led to almost identical values of orbital inclinations and stellar radii to the first published values while the planet radii were slightly different: that of HAT-P-54b was bigger and that of WASP-153b was smaller. The more bloated nature of WASP-153b is a result of its considerable close orbit and high stellar temperature. Our calculation of the WASP-153 distance is very close to that measured by GAIA. The best fits of the newly-observed transits of HAT-P-54b and WASP-153b correspond to the quadratic limb-darkening law of their host stars whose coefficients were determined. Our results confirmed the hot Jupiter nature of the two targets.

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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related fields (written upon invitation only), Original Scientific Papers - article in which are presented previously unpublished author''s own scientific results, Preliminary Reports - original scientific paper, but shorter in length and of preliminary nature, Professional Papers -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.