Astronomical Applications of Astrometry: The Hipparcos and Tycho Catalogues
Astronomical Applications of Astrometry: The Hipparcos and Tycho Catalogues
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DOI：
10.1017/cbo9780511575242.002
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
M. Perryman
中科院分区：
文献类型：
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作者：
M. Perryman
本章介绍依巴谷星表和第谷星表的各个方面，有助于理解后续章节中考虑的科学开发。它描述了与理解目录内容有关的一些卫星测量原则;公布的中间天体测量数据;所采用的参考框架的细节;与目录用户有关的基本变换;第谷2号目录构建的细节;误差评估;以及径向速度和交叉识别等相关数据的细节。依巴谷星表包含118218个条目，相当于整个天空中平均每平方度约有3颗恒星。五个天体测量参数的中位精度（Hp <9等）超过了最初的使命目标，在0.6 - 1.0等之间。大约20 000个距离被确定为优于10%，50 000个距离被确定为优于20%。推断的外部误差与标准误差的比值为0.01。0-1. 2，估计的系统误差小于0.1 mas。已解决或疑似双星或多星的数量为23882。测光观测产生了多历元测光，平均每颗星星有110次观测，测光精度中位数（Hp <9等）为0.0015等，11597个条目被确定为变量或可能变量。包含100万颗恒星的第谷星表在2000年被包含250万颗恒星的第谷2号星表所取代，两者都包含双色测光。
This chapter describes various aspects of the Hipparcos and Tycho Catalogues useful for understanding the scientific exploitation considered in subsequent chapters. It describes some of the satellite measurement principles relevant for an understanding of the catalogue contents; the published intermediate astrometry data; details of the adopted reference frame; basic transformations relevant to catalogue users; details of the Tycho 2 Catalogue construction; error assessment; and details of associated data such as radial velocities and cross-identifications. The Hipparcos Catalogue contains 118 218 entries, corresponding to an average of some three stars per square degree over the entire sky. Median precision of the five astrometric parameters (Hp < 9 mag) exceeded the original mission goals, and are between 0.6–1.0 mas. Some 20 000 distances were determined to better than 10%, and 50 000 to better than 20%. The inferred ratio of external to standard errors is ∼1. 0–1. 2, and estimated systematic errors are below 0.1 mas. The number of solved or suspected double or multiple stars is 23 882. Photometric observations yielded multi-epoch photometry with a mean number of 110 observations per star, a median photometric precision (Hp < 9 mag) of 0.0015 mag, and 11 597 entries were identified as variable or possibly variable. The Tycho Catalogue of just over 1 million stars was superseded in 2000 by the Tycho 2 Catalogue of some 2.5 million stars; both included two-colour photometry.