HAT-P-27b:一颗轨道周期为3天的热木星凌星系G星
地球与行星天体物理
2015-03-17 v2 太阳与恒星天体物理
摘要
我们报告了HAT-P-27b的发现,这是一颗凌星系中等亮度G8矮星GSC 0333-00351(V=12.214)的系外行星。轨道周期为3.039586 ± 0.000012天,凌星参考历元为2455186.01879 ± 0.00054(BJD),凌星持续时间为0.0705 ± 0.0019天。主星的有效温度为5300 ± 90 K,比太阳稍冷,金属丰度更高,为+0.29 ± 0.10。其质量为0.94 ± 0.04 M☉,半径为0.90 ± 0.04 R☉。对于行星伴星,我们确定其质量为0.660 ± 0.033 M_J,半径为1.038 +0.077 -0.058 R_J。对于已知的30颗质量在0.3 M_J到0.8 M_J之间的凌星系外行星,主星金属丰度与行星半径之间的负相关,以及行星半径对平衡温度的额外依赖性,在很高的统计显著性水平上得到了确认。
引用
@article{arxiv.1101.3511,
title = {HAT-P-27b: A hot Jupiter transiting a G star on a 3 day orbit},
author = {Bence Béky and Gáspár Á. Bakos and Joel Hartman and Guillermo Torres and David W. Latham and Andres Jordán and Pamela Arriagada and Daniel Bayliss and László L. Kiss and Géza Kovács and Sam N. Quinn and Geoffrey W. Marcy and Andrew W. Howard and Debra A. Fischer and John A. Johnson and Gilbert A. Esquerdo and Robert W. Noyes and Lars A. Buchhave and Dimitar D. Sasselov and Robert P. Stefanik and Gopakumar Perumpilly and József Lázár and István Papp and Pál Sári},
journal= {arXiv preprint arXiv:1101.3511},
year = {2015}
}
备注
Submitted to ApJ on 2011-01-18. 12 pages, 7 figures, 7 tables