论文标题
附近11个的光谱轨道轨道轨道,中高矮人矮人二进制
Spectroscopic Orbits of Eleven Nearby, Mid-to-Late M Dwarf Binaries
论文作者
论文摘要
我们介绍了附近11个的光谱轨道,中高矮的M矮二进制系统中的各种配置:两个单层二进制文件(SB1),七个双层二线二进制(SB2),一个双层三重三重(ST2)和一个三层衬里的Triple Triple(ST3)。这些轨道中的八个是针对这些系统的首次发布,而五个是新鉴定的倍数。我们在位于亚利桑那州霍普金斯山上的弗雷德·劳伦斯·惠普尔天文台(Fred Lawrence Whipple天文台的150万个tillinghast反射器上的TRE仪器)获得了多上述高分辨率光谱。我们使用7065-7165埃的TIO分子带,为这些系统计算了径向速度,从中我们得出了它们的轨道。我们发现LHS 1817在7小时的时期内有一个可能是白色矮人的同伴,这是由于我们在Mearth-North-North Light曲线数据中看到的椭圆形调制。我们发现G 123-45和LTT 11586的最低质量为41 m_jup和44 m_jup的同伴分别为35天和15天。我们发现2MA 0930+0227在917天的轨道时期内具有快速旋转的恒星伴侣。 GJ 268,GJ 1029,LP 734-34,GJ 1182,G 258-17和LTT 7077是SB2S,具有恒星伴侣,轨道周期为10、96、34、154、154、5和84天; LP 655-43是一个在18天轨道时期内有一个伴侣的ST3,在不确定的时期内是外部成分。此外,我们还提出了L 870-44AB的组件和LTT 11586和LP 655-43的外部组件的径向速度。
We present the spectroscopic orbits of eleven nearby, mid-to-late M dwarf binary systems in a variety of configurations: two single-lined binaries (SB1s), seven double-lined binaries (SB2s), one double-lined triple (ST2), and one triple-lined triple (ST3). Eight of these orbits are the first published for these systems, while five are newly identified multiples. We obtained multi-epoch, high-resolution spectra with the TRES instrument on the 1.5m Tillinghast Reflector at the Fred Lawrence Whipple Observatory located on Mt. Hopkins in AZ. Using the TiO molecular bands at 7065 -- 7165 Angstroms, we calculated radial velocities for these systems, from which we derived their orbits. We find LHS 1817 to have in a 7-hour period a companion that is likely a white dwarf, due to the ellipsoidal modulation we see in our MEarth-North light curve data. We find G 123-45 and LTT 11586 to host companions with minimum masses of 41 M_Jup and 44 M_Jup with orbital periods of 35 and 15 days, respectively. We find 2MA 0930+0227 to have a rapidly rotating stellar companion in a 917-day orbital period. GJ 268, GJ 1029, LP 734-34, GJ 1182, G 258-17, and LTT 7077 are SB2s with stellar companions with orbital periods of 10, 96, 34, 154, 5, and 84 days; LP 655-43 is an ST3 with one companion in an 18-day orbital period and an outer component in a longer undetermined period. In addition, we present radial velocities for both components of L 870-44AB and for the outer components of LTT 11586 and LP 655-43.