论文标题
太阳邻居XLIX:M矮人的新发现和轨道,spe spe spe spemetry
The Solar Neighborhood XLIX: New Discoveries and Orbits of M Dwarf Multiples with Speckle Interferometry at SOAR
论文作者
论文摘要
我们提出了一个多年计划的第一个结果,该计划将在25个parsecs中绘制M矮人倍数的轨道。观察结果主要是在2019年至2020年期间使用智利南部天体物理研究(SOAR)望远镜的Speckle干涉法,使用安装在自适应光学模块(HRCAM+SAM)上的高分辨率摄像头。附近的M矮人的样本来自三个来源:重新组件的倍数在Smarts 0.9m的长期星体监测程序中,已知的倍数,这些新观察值将启用或改善轨道拟合,以及其在Gaia Data Release 2(DR2)中由Astretric fit的候选倍数(DR2)。我们通过830个斑点观测调查了333 m矮人中的333个,检测了63%的恒星的伴侣。最值得注意的是,这包括从Gaia DR2选择的子集中的76%的新伴侣。总的来说,我们向观察到的M矮人报告了对97个新恒星伴侣的首次直接检测。在这里,我们介绍这些检测的属性,每个非检测的限制以及五个轨道,其周期为0.67-29年,已经是该程序的一部分。检测到的同伴预计分离为0.024-2.0 arcsec(0.25-66 au),并具有$Δi\ lyssim 5.0 $ mag。这项多年活动最终将为附近的M矮人绘制完整的轨道,其周期为3年,并提供关键时期,以将二进制文件扩展到30年。
We present the first results of a multi-year program to map the orbits of M dwarf multiples within 25 parsecs. The observations were conducted primarily during 2019 - 2020 using speckle interferometry at the Southern Astrophysical Research (SOAR) Telescope in Chile, using the High-Resolution Camera mounted on the adaptive optics module (HRCam+SAM). The sample of nearby M dwarfs is drawn from three sources: multiples from the RECONS long-term astrometric monitoring program at the SMARTS 0.9m, known multiples for which these new observations will enable or improve orbit fits, and candidate multiples flagged by their astrometric fits in Gaia Data Release 2 (DR2). We surveyed 333 of our 338 M dwarfs via 830 speckle observations, detecting companions for 63% of the stars. Most notably, this includes new companions for 76% in the subset selected from Gaia DR2. In all, we report the first direct detections of 97 new stellar companions to the observed M dwarfs. Here we present the properties of those detections, the limits of each non-detection, and five orbits with periods 0.67 - 29 yr already observed as part of this program. Companions detected have projected separations of 0.024 - 2.0 arcsec (0.25 - 66 AU) from their primaries and have $ΔI \lesssim 5.0$ mag. This multi-year campaign will ultimately map complete orbits for nearby M dwarfs with periods up to 3 yr, and provide key epochs to stretch orbital determinations for binaries to 30 yr.