WASP-5b: a dense, very hot Jupiter transiting a 12th-mag Southern-hemisphere star-猫眼课题宝

DOI：

10.1111/j.1745-3933.2008.00465.x

发表时间：

2008-01

期刊：

Monthly Notices of the Royal Astronomical Society: Letters

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作者：

D. Anderson;M. Gillon;C. Hellier;P. Maxted;F. Pepe;D. Queloz;D. Wilson;A. Cameron;B. Smalley;T. Lister;T. Lister;S. Bentley;A. Blecha;D. Christian;B. Enoch;L. Hebb;K. Horne;J. Irwin;Y. Joshi;S. Kane;M. Marmier;M. Mayor;N. Parley;D. Pollacco;F. Pont;R. Ryans;D. Ségransan;I. Skillen;R. Street;R. Street;R. Street;S. Udry;R. West;P. Wheatley

我们报告发现了WASP-5 b，这是一颗在南半球绕着一颗12等G型星星运行的行星。1.6-d的轨道周期将WASP-5 b置于非常热的类星体中，并导致预测的平衡温度为1750 K。WASP-5 b是任何已知木星质量行星的密度，比受到类似恒星日照的TrES-4密度高7倍，比具有类似轨道周期的WASP-4 b密度高3倍。本文介绍了WASP-5的凌日测光和视向速度测量结果（= USNO-B1 0487-0799749），从中我们得出了行星的质量，半径和密度：M_P= 1.58^（+0.13）_（-0.08）M_J，R_P= 1.090^（+0.094）_（−0.058）R_J和ρ_P= 1.22^（+0.19）_（−0.24）ρ_J，轨道周期为P= 1.6284296^（+0.0000048）_（-0.0000037）d，中天历元T_C（HJD）= 245 4375.62466^（+0.00026）_（-0.00025）。

We report the discovery of WASP-5b, a Jupiter-mass planet orbiting a 12th-mag G-type star in the Southern hemisphere. The 1.6-d orbital period places WASP-5b in the class of very hot Jupiters and leads to a predicted equilibrium temperature of 1750 K. WASP-5b is the densest of any known Jovian-mass planet, being a factor of 7 denser than TrES-4, which is subject to similar stellar insolation, and a factor of 3 denser than WASP-4b, which has a similar orbital period. We present transit photometry and radial velocity measurements of WASP-5 (= USNO-B1 0487-0799749), from which we derive the mass, radius and density of the planet: M_P= 1.58^(+0.13)_(−0.08) M_J, R_P= 1.090^(+0.094)_(−0.058) R_J and ρ_P= 1.22^(+0.19)_(−0.24) ρ_J. The orbital period is P= 1.6284296^(+0.0000048)_(−0.0000037) d and the mid-transit epoch is T_C (HJD) = 245 4375.62466^(+0.00026)_(−0.00025).

WASP-5b: a dense, very hot Jupiter transiting a 12th-mag Southern-hemisphere star

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