HAT-P-30b: A TRANSITING HOT JUPITER ON A HIGHLY OBLIQUE ORBIT-猫眼课题宝

DOI：

10.1088/0004-637x/735/1/24

发表时间：

2011-03

期刊：

The Astrophysical Journal

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

J. Johnson;J. Winn;G. Bakos;J. Hartman;T. Morton;G. Torres;G. Kov'acs;D. Latham;R. Noyes;B. Sato;G. Esquerdo;D. Fischer;G. Marcy;A. Howard;L. Buchhave;G. Fűrész;S. Quinn;B. Béky;D. Sasselov;R. Stefanik;J. Lázár;I. Papp;P. Sári

我们报告发现了HAT-P-30 b，这是一颗绕V = 10.419矮星星GSC 0208-00722运行的系外行星。该行星的周期P = 2.810595 ± 0.000005天，凌日Tc = 2455456.46561 ± 0.00037（BJD），凌日持续时间为0.0887 ± 0.0015天。主星星的质量为1.24 ± 0.04 M，半径为1.21 ± 0.05 R，有效温度为6304 ± 88 K，金属量[Fe/H] = +0.13 ± 0.08。它的质量为0.711 ± 0.028 MJ，半径为1.340 ± 0.065 RJ，平均密度为0.37 ± 0.05 g cm−3。我们还提出了径向速度测量，在整个过境表现出罗斯特-麦克劳克林效应。通过模拟这种效应，我们测量到行星轨道法线和星星自转轴的天空投影之间的角度为λ = 73.°5 ± 9.°0。HAT-P-30 b代表了另一个在高度倾斜轨道上的近距离行星的例子，并且符合之前提到的模式，即倾斜轨道在Teff = 6250 K的恒星周围更常见。

We report the discovery of HAT-P-30b, a transiting exoplanet orbiting the V = 10.419 dwarf star GSC 0208-00722. The planet has a period P = 2.810595 ± 0.000005 days, transit epoch Tc = 2455456.46561 ± 0.00037 (BJD), and transit duration 0.0887 ± 0.0015 days. The host star has a mass of 1.24 ± 0.04 M☉, radius of 1.21 ± 0.05 R☉, effective temperature of 6304 ± 88 K, and metallicity [Fe/H] = +0.13 ± 0.08. The planetary companion has a mass of 0.711 ± 0.028 MJ and radius of 1.340 ± 0.065 RJ yielding a mean density of 0.37 ± 0.05 g cm−3. We also present radial velocity measurements that were obtained throughout a transit that exhibit the Rossiter–McLaughlin effect. By modeling this effect, we measure an angle of λ = 73.°5 ± 9.°0 between the sky projections of the planet's orbit normal and the star's spin axis. HAT-P-30b represents another example of a close-in planet on a highly tilted orbit, and conforms to the previously noted pattern that tilted orbits are more common around stars with Teff⋆ ≳ 6250 K.

HAT-P-30b: A TRANSITING HOT JUPITER ON A HIGHLY OBLIQUE ORBIT

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