MARVELS-1b：来自SDSS-III MARVELS行星搜索的短周期褐矮星荒漠候选体
地球与行星天体物理
2015-05-20 v1
摘要
我们提出了一颗围绕恒星TYC 1240-00945-1的新的短周期褐矮星候选体。该候选体是在多目标APO径向速度系外行星大视场巡天（MARVELS）的第一年发现的，该巡天是斯隆数字巡天第三阶段的一部分，我们将这颗褐矮星命名为MARVELS-1b。MARVELS使用色散固定延迟干涉测量技术，通过一个定制的、由SDSS 2.5米望远镜光纤馈入的仪器，同时获取每个视场60个天体的径向速度测量值。根据我们在约370天时间基线内获得的20个径向速度测量值，我们推导出一个开普勒轨道拟合，其半振幅K=2.533±0.025 km/s，周期P=5.8953±0.0004天，偏心率与圆轨道一致。独立的后续径向速度数据证实了该轨道。假设这颗略微演化的F9主星质量为1.37±0.11 M_Sun，我们推断其伴星的最小质量为28.0±1.5 M_Jup，假设轨道为边缘-on，半长轴为0.071±0.002 AU，并且可能处于潮汐同步状态。我们没有发现主星在伴星周期上存在大于几个毫星等水平的相干内禀变化的证据。该伴星的先验凌星概率约为14%。尽管我们没有发现凌星的证据，但对于半径约<1 R_Jup的伴星，我们不能明确排除其存在。
引用
@article{arxiv.1011.5170,
title = {MARVELS-1b: A Short-Period, Brown Dwarf Desert Candidate from the SDSS-III MARVELS Planet Search},
author = {Brian L. Lee and Jian Ge and Scott W. Fleming and Keivan G. Stassun and B. Scott Gaudi and Rory Barnes and Suvrath Mahadevan and Jason D. Eastman and Jason Wright and Robert J. Siverd and Bruce Gary and Luan Ghezzi and Chris Laws and John P. Wisniewski and G. F. Porto de Mello and Ricardo L. C. Ogando and Marcio A. G. Maia and Luiz Nicolaci da Costa and Thirupathi Sivarani and Joshua Pepper and Duy Cuong Nguyen and Leslie Hebb and Nathan De Lee and Ji Wang and Xiaoke Wan and Bo Zhao and Liang Chang and John Groot and Frank Varosi and Fred Hearty and Kevin Hanna and J. C. van Eyken and Stephen R. Kane and Eric Agol and Dmitry Bizyaev and John J. Bochanski and Howard Brewington and Zhiping Chen and Erin Costello and Liming Dou and Daniel J. Eisenstein and Adam Fletcher and Eric B. Ford and Pengcheng Guo and Jon A. Holtzman and Peng Jiang and R. French Leger and Jian Liu and Daniel C. Long and Elena Malanushenko and Viktor Malanushenko and Mohit Malik and Daniel Oravetz and Kaike Pan and Pais Rohan and Donald P. Schneider and Alaina Shelden and Stephanie A. Snedden and Audrey Simmons and B. A. Weaver and David H. Weinberg and Ji-Wei Xie},
journal= {arXiv preprint arXiv:1011.5170},
year = {2015}
}
备注
47 pages, 11 figures. Accepted for publication in ApJ