银河疏散星团的天体物理参数

IF 27.8 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

The Astronomy and Astrophysics Review Pub Date : 2005-01-31 DOI:10.1051/0004-6361:20042523

N. Kharchenko, A. Piskunov, A. Piskunov, S. Röser, E. Schilbach, R. Scholz

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引用次数: 488

摘要

我们提出了520个银河疏散星团的天体物理数据目录。这些星团至少有三个最有可能的成员(平均18个)可以在ASCC-2.5中被识别出来，ASCC-2.5是一份基于Hipparcos任务的第谷-2观测结果的恒星目录。我们采用均匀的方法和算法来确定星团核心和日冕的角大小、日心距离、平均固有运动、平均径向速度和年龄。我们首次得出了200个星团的距离，94个星团的径向速度，以及196个星团的年龄。这个齐次的新参数集与早期的确定进行比较，我们发现，特别是，在文献中，角尺寸被系统地低估了。

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Astrophysical parameters of Galactic open clusters

We present a catalogue of astrophysical data for 520 Galactic open clusters. These are the clusters for which at least three most probable members (18 on average) could be identified in the ASCC-2.5, a catalogue of stars based on the Tycho-2 observations from the Hipparcos mission. We applied homogeneous methods and algorithms to determine angular sizes of cluster cores and coronae, heliocentric distances, mean proper motions, mean radial velocities, and ages. For the first time we derive distances for 200 clusters, radial velocities for 94 clusters, and ages of 196 clusters. This homogeneous new parameter set is compared with earlier determinations, where we find, in particular, that the angular sizes were systematically underestimated in the literature.

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来源期刊

The Astronomy and Astrophysics Review 地学天文-天文与天体物理

CiteScore

45.00

自引率

0.80%

发文量

期刊介绍： The Astronomy and Astrophysics Review is a journal that covers all areas of astronomy and astrophysics. It includes subjects related to other fields such as laboratory or particle physics, cosmic ray physics, studies in the solar system, astrobiology, instrumentation, and computational and statistical methods with specific astronomical applications. The frequency of review articles depends on the level of activity in different areas. The journal focuses on publishing review articles that are scientifically rigorous and easily comprehensible. These articles serve as a valuable resource for scientists, students, researchers, and lecturers who want to explore new or unfamiliar fields. The journal is abstracted and indexed in various databases including the Astrophysics Data System (ADS), BFI List, CNKI, CNPIEC, Current Contents/Physical, Chemical and Earth Sciences, Dimensions, EBSCO Academic Search, EI Compendex, Japanese Science and Technology, and more.