MWC 314的光谱、MOST测光与干涉观测：它是亮蓝变星还是相互作用双星？
太阳与恒星天体物理
2015-11-11 v1
摘要
MWC 314是一个明亮的候选亮蓝变星(LBV)，位于一个相当紧密的双星系统中，轨道周期为60.7530.003 d。我们结合光学光谱、宽带地基与天基测光以及长基线近红外干涉观测了MWC 314。我们修正了单线光谱轨道并探讨了测光变率。轨道光变曲线每个轨道显示两个极小值，可部分用主星在近星点附近的潮汐畸变解释。系统中的发射线常呈双峰且运动学上静止，表明存在环双星盘。我们发现恒星风或环双星盘在K′波段用CHARA阵列最长基线部分分辨。由此分析，我们提供一个简单的定性模型试图解释观测。从洛希瓣溢出和近星点潮汐同步的假设，我们估计成员星质量分别为M1 M和M2 M，表明LBV质量极低。除轨道调制外，我们用MOST卫星发现了两个脉动模式。这些模式很容易被低质量氢贫星支持，但不易被具有LBV参数的星支持。这些结果组合提供证据表明主星可能从未是正常的LBV，而是双星相互作用的产物。因此，该系统为用多种观测技术研究质量转移和双星演化提供了机会。
引用
@article{arxiv.1510.00324,
title = {Spectroscopy, MOST Photometry, and Interferometry of MWC 314: Is it an LBV or an interacting binary?},
author = {Noel D. Richardson and Anthony F. J. Moffat and Raphaël Maltais-Tariant and Herbert Pablo and Douglas R. Gies and Hideyuki Saio and Nicole St-Louis and Gail Schaefer and Anatoly S. Miroshnichenko and Chris Farrington and Emily J. Aldoretta and Étienne Artigau and Tabetha S. Boyajian and Kathryn Gordon and Jeremy Jones and Rachel Matson and Harold A. McAlister and David O'Brien and Deepak Raghavan and Tahina Ramiaramanantsoa and Stephen T. Ridgway and Nic Scott and Judit Sturmann and Laszlo Sturmann and Theo ten Brummelaar and Joshua D. Thomas and Nils Turner and Norm Vargas and Sergey Zharikov and Jaymie Matthews and Chris Cameron and David Guenther and Rainer Kuschnig and Jason Rowe and Slavek Rucinski and Dimitar Sasselov and Werner Weiss},
journal= {arXiv preprint arXiv:1510.00324},
year = {2015}
}
备注
26 pages, 7 figures, 5 tables, 2 appendices with 7 additional tables and 2 additional figures. Accepted for publication in MNRAS