天体测量学作为发现和权衡近邻恒星微弱伴星的工具

IF 3.3 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Publications of the Astronomical Society of the Pacific Pub Date : 2024-07-09 DOI:10.1088/1538-3873/ad59c5
Timothy D. Brandt
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引用次数: 0

摘要

本教程涉及绝对天体测量法的使用,特别是希帕克斯和盖亚任务的结合使用,以确定附近恒星的微弱伴星,并测量这些伴星的质量和轨道。绝对天体测量法越来越成功地用于发现新的行星和褐矮星,以及测量周期长达几个世纪的系统的质量和轨道。本教程总结了基础天体测量数据的性质、通常用于拟合轨道的方法以及整个过程中隐含的数据假设。它试图提供天体测量敏感性作为恒星和伴星特性函数的直观感受,以及可用约束条件如何取决于可用数据的特性和数量。本教程是为具有一定天文学背景,但对天体测量学或轨道拟合不甚了解的人编写的。
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Astrometry as a Tool for Discovering and Weighing Faint Companions to Nearby Stars
This tutorial covers the use of absolute astrometry, in particular from the combination of the Hipparcos and Gaia missions, to identify faint companions to nearby stars and to measure the masses and orbits of those companions. Absolute astrometry has been used with increasing success to discover new planets and brown dwarfs and to measure masses and orbits for systems with periods as long as centuries. This tutorial summarizes the nature of the underlying astrometric data, the approach typically used to fit orbits, and the assumptions about that data implicit throughout the process. It attempts to provide intuition for the sensitivity of astrometry as a function of stellar and companion properties and how the available constraints depend on the character and quantity of data available. This tutorial is written for someone with some background in astronomy but with no more than a minimal acquaintance with astrometry or orbit fitting.
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来源期刊
Publications of the Astronomical Society of the Pacific
Publications of the Astronomical Society of the Pacific 地学天文-天文与天体物理
CiteScore
6.70
自引率
5.70%
发文量
103
审稿时长
4-8 weeks
期刊介绍: The Publications of the Astronomical Society of the Pacific (PASP), the technical journal of the Astronomical Society of the Pacific (ASP), has been published regularly since 1889, and is an integral part of the ASP''s mission to advance the science of astronomy and disseminate astronomical information. The journal provides an outlet for astronomical results of a scientific nature and serves to keep readers in touch with current astronomical research. It contains refereed research and instrumentation articles, invited and contributed reviews, tutorials, and dissertation summaries.
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