利用双子星行星成像仪解析年轻分光双星 V343 Normae AaAb 并测量其动力学质量
太阳与恒星天体物理
2016-12-07 v1
摘要
我们展示了来自双子星行星成像仪对年轻多恒星系统 V343 Normae 内部双星的新空间分辨天体测量和光度测量数据，该系统是绘架座 β 移动星群的成员。V343 Normae 包含一颗 K0 型星和一颗中 M 型星，位于一个约 4.5 年的轨道上 (AaAb)，以及一个宽距 10 角秒的 M5 伴星 (B)。通过将这些数据与档案天体测量和视向速度相结合，我们拟合了轨道并测量了两个子星各自的质量，分别为 M_Aa = 1.10 +/- 0.10 M_sun 和 M_Ab = 0.290 +/- 0.018 M_sun。与理论等时线比较，我们发现两个子星测得的质量和 JHK 波段星等与绘架座 β 移动星群的年龄有良好的一致性。通过将我们对 V343 Normae 的结果与文献中对 GJ 3305（该星群另一个具有解析双星子星和动力学质量的成员）的测量相结合，我们推导出绘架座 β 移动星群的模型依赖年龄为 26 +/- 3 Myr。
引用
@article{arxiv.1609.09095,
title = {Dynamical Mass Measurement of the Young Spectroscopic Binary V343 Normae AaAb Resolved With the Gemini Planet Imager},
author = {Eric L. Nielsen and Robert J. De Rosa and Jason Wang and Julien Rameau and Inseok Song and James R. Graham and Bruce Macintosh and Mark Ammons and Vanessa P. Bailey and Travis S. Barman and Joanna Bulger and Jeffrey K. Chilcote and Tara Cotten and Rene Doyon and Gaspard Duchene and Michael P. Fitzgerald and Katherine B. Follette and Alexandra Z. Greenbaum and Pascale Hibon and Li-Wei Hung and Patrick Ingraham and Paul Kalas and Quinn M. Konopacky and James E. Larkin and Jerome Maire and Franck Marchis and Mark S. Marley and Christian Marois and Stanimir Metchev and Maxwell A. Millar-Blanchaer and Rebecca Oppenheimer and David W. Palmer and Jenny Patience and Marshall D. Perrin and Lisa A. Poyneer and Laurent Pueyo and Abhijith Rajan and Fredrik T. Rantakyro and Dmitry Savransky and Adam C. Schneider and Anand Sivaramakrishnan and Remi Soummer and Sandrine Thomas and J. Kent Wallace and Kimberly Ward-Duong and Sloane J. Wiktorowicz and Schuyler G. Wolff},
journal= {arXiv preprint arXiv:1609.09095},
year = {2016}
}
备注
12 pages, 7 figures. Accepted to AJ