HAT-P-13b,c: A TRANSITING HOT JUPITER WITH A MASSIVE OUTER COMPANION ON AN ECCENTRIC ORBIT-猫眼课题宝

DOI：

10.1088/0004-637x/707/1/446

发表时间：

2009-07

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：

G. Bakos;A. Howard;R. W. Noyes;J. Hartman;G. Torres;G. Kovács;D. Fischer;D. Latham;J. Johnson;G. Marcy;D. Sasselov;R. Stefanik;B. Sipocz;Gabor Kovacs;G. Esquerdo;A. Pál;J. Lázár;I. P. CfA;Nsf Fellow;Ucb;K. Observatory;Sfsu;Ifa;D. Astronomy;Elte;Hungarian Astronomical Association

我们报告了一个行星系统的发现，其中一个近距离过境的热木星在一个近圆形轨道上，一个巨大的外行星在一个高度偏心的轨道上。内行星HAT-P-13 b每隔P = 2.916260 ± 0.000010天就会经过明亮的V = 10.622 G4矮星星星GSC 3416 − 00543，凌日历元Tc = 2454779.92979 ± 0.00038（BJD），持续时间为0.1345 ± 0.0017天。外行星HAT-P-13 c每隔P2 = 428.5 ± 3.0天绕星星公转一周，标称凌日中心（假设零撞击参数）为T2 c = 2454870.4 ± 1.8（BJD）或近星点通过时间T2，τ = 2454890.05 ± 0.48（BJD）。外行星的凌日还没有被观测到，也可能不存在。主星星的质量为1.22+0.05− 0.10 M，半径为1.56 ± 0.08 R，有效温度为5653 ± 90 K，并且富含金属，[Fe/H] = +0.41 ± 0.08。内行星伴星的质量为0.853+0.029−0.046 MJ，半径为1.281 ± 0.079 RJ，平均密度为0.498+0.103−0.069 g cm−3。外伴星的m2 sin i2 = 15.2 ± 1.0 MJ，轨道的偏心率为e2 = 0.691 ± 0.018。虽然我们还没有检测到HAT-P-13 b的显著凌日时间变化，但由于引力和光旅行时间的影响，未来的观测将限制HAT-P-13 c的轨道倾角，沿着与HAT-P-13 b的相互倾角。HAT-P-13（B，c）双行星系统对于行星系统的形成和动力学的理论研究可能是非常有价值的。

We report on the discovery of a planetary system with a close-in transiting hot Jupiter on a near circular orbit and a massive outer planet on a highly eccentric orbit. The inner planet, HAT-P-13b, transits the bright V = 10.622 G4 dwarf star GSC 3416 − 00543 every P = 2.916260 ± 0.000010 days, with transit epoch Tc = 2454779.92979 ± 0.00038 (BJD) and duration 0.1345 ± 0.0017 days. The outer planet HAT-P-13c orbits the star every P2 = 428.5 ± 3.0 days with a nominal transit center (assuming zero impact parameter) of T2c = 2454870.4 ± 1.8 (BJD) or time of periastron passage T2,peri = 2454890.05 ± 0.48 (BJD). Transits of the outer planet have not been observed, and may not be present. The host star has a mass of 1.22+0.05−0.10M☉, radius of 1.56 ± 0.08 R☉, effective temperature of 5653 ± 90 K, and is rather metal-rich with [Fe/H] = +0.41 ± 0.08. The inner planetary companion has a mass of 0.853+0.029−0.046 MJ, and radius of 1.281 ± 0.079 RJ, yielding a mean density of 0.498+0.103−0.069 g cm−3. The outer companion has m2sin i2 = 15.2 ± 1.0 MJ, and orbits on a highly eccentric orbit of e2 = 0.691 ± 0.018. While we have not detected significant transit timing variations of HAT-P-13b, due to gravitational and light-travel time effects, future observations will constrain the orbital inclination of HAT-P-13c, along with its mutual inclination to HAT-P-13b. The HAT-P-13 (b, c) double-planet system may prove extremely valuable for theoretical studies of the formation and dynamics of planetary systems.

HAT-P-13b,c: A TRANSITING HOT JUPITER WITH A MASSIVE OUTER COMPANION ON AN ECCENTRIC ORBIT

文献摘要

被引文献

相似文献