WASP-113b and WASP-114b, two inflated hot Jupiters with contrasting densities
WASP-113b and WASP-114b, two inflated hot Jupiters with contrasting densities
复制标题
DOI：
10.1051/0004-6361/201526517
复制
发表时间：
2016-09-01
影响因子：
6.5
通讯作者：
Wheatley, P. J.
中科院分区：
文献类型：
--
作者：
Barros, S. C. C.;Brown, D. J. A.;Wheatley, P. J.
目标。我们介绍了WASP-113b和WASP-114b系外行星的发现和特征，通过WASP调查，SOPHIE和coralie方法。这些系统的行星性质是通过后续的光度和光谱观测确定的。将跟踪数据与wasp光度法相结合，用MCMC代码进行分析，得到系统参数。主星WASP-113和WASP-114非常相似。它们都是早期的g型恒星，有效温度接近5900 K， [Fe/H]接近0.12，log g接近4.1指数。然而，WASP-113比WASP-114更古老。尽管这两颗伴星的半径相似，但WASP-114b的质量几乎是WASP-113b的四倍。WASP-113b的质量为0.48 M-Jup，轨道周期约为4.5天；WASP-114b的质量为1.77 M-Jup，轨道周期约为1.5天。这两颗行星都有膨胀的半径，特别是WASP-113，其半径异常R = 0.35。wasp -113b的高尺度高度（接近950公里）使其成为后续大气观测的良好目标。
Aims. We present the discovery and characterisation of the exoplanets WASP-113b and WASP-114b by the WASP surveys, SOPHIE and CORALIE.Methods. The planetary nature of the systems was established by performing follow-up photometric and spectroscopic observations. The follow-up data were combined with the WASP-photometry and analysed with an MCMC code to obtain system parameters.Results. The host stars WASP-113 and WASP-114 are very similar. They are both early G-type stars with an effective temperature of similar to 5900 K, [Fe/H] similar to 0.12, and log g similar to 4.1 dex. However, WASP-113 is older than WASP-114. Although the planetary companions have similar radii, WASP-114b is almost four times heavier than WASP-113b. WASP-113b has a mass of 0.48 M-Jup and an orbital period of similar to 4.5 days; WASP-114b has a mass of 1.77 M-Jup and an orbital period of similar to 1.5 days. Both planets have inflated radii, in particular WASP-113 with a radius anomaly of R = 0.35. The high scale height ofWASP-113b (similar to 950 km) makes it a good target for follow-up atmospheric observations.