论文标题
HATS-37AB和HATS-38B：沙漠中的两个过境热海王
HATS-37Ab and HATS-38b: Two Transiting Hot Neptunes in the Desert
论文作者
论文摘要
我们报告了汉茅斯调查发现了两个过渡海王星的发现。 The planet HATS-37Ab has a mass of 0.099 +- 0.042 M_J (31.5 +- 13.4 M_earth) and a radius of 0.606 +- 0.016 R_J, and is on a P = 4.3315 days orbit around a V = 12.266 mag, 0.843 M_sun star with a radius of 0.877 R_sun.我们还提供了证据表明，Star HATS-37A具有未解决的恒星伴侣Hats-37b，其光学估计的质量为0.654m_sun。PlanetHats-38b的质量为0.074 +-0.011111111M_J（23.5 +-3.5 m_earth），radius of 0.61114 +0.6114 +-0.6117 rrj，and和0.017 ryj，and r R. / r R.47 rr r r r r r r r r r r r r r。 v = 12.411 mag，0.890 m_sun star周围的轨道，半径为1.105 r_sun。这两个系统似乎都是旧的，基于等速线的年龄为11.46 +0.79-1.45 GYR和11.89 +-0.60 GYR。 HATS-37AB和HATS-38B都位于海王星沙漠中，因此是发生率较低的人群的例子。它们也是迄今为止从地面宽场调查中发现的最低质量行星之一。
We report the discovery of two transiting Neptunes by the HATSouth survey. The planet HATS-37Ab has a mass of 0.099 +- 0.042 M_J (31.5 +- 13.4 M_earth) and a radius of 0.606 +- 0.016 R_J, and is on a P = 4.3315 days orbit around a V = 12.266 mag, 0.843 M_sun star with a radius of 0.877 R_sun. We also present evidence that the star HATS-37A has an unresolved stellar companion HATS-37B, with a photometrically estimated mass of 0.654 M_sun.The planet HATS-38b has a mass of 0.074 +- 0.011 M_J (23.5 +- 3.5 M_earth) and a radius of 0.614 +- 0.017 R_J, and is on a P = 4.3750 days orbit around a V = 12.411 mag, 0.890 M_sun star with a radius of 1.105 R_sun. Both systems appear to be old, with isochrone-based ages of 11.46 +0.79-1.45 Gyr, and 11.89 +- 0.60 Gyr, respectively. Both HATS-37Ab and HATS-38b lie in the Neptune desert and are thus examples of a population with a low occurrence rate. They are also among the lowest mass planets found from ground-based wide-field surveys to date.
