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arXiv 2104.02649astro-ph.GA
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河外距离数据库:红巨星分支距离星表的色星等图和尖点

The Extragalactic Distance Database: The Color-Magnitude Diagrams and Tip of the Red Giant Branch Distances Catalog

Gagandeep S. Anand, Luca Rizzi, R. Brent Tully, Edward J. Shaya, Igor D. Karachentsev, Dmitry I. Makarov, Lidia Makarova, Po-Feng Wu, Andrew E. Dolphin, Ehsan Kourkchi

摘要:

银河系外距离数据库(EDD)是作为一个高质量的,与红移无关的距离的存储库而创建的。EDD的一个关键组成部分是彩色星等图/红巨星分支尖端(CMD/TRGB)目录,它提供了哈勃太空望远镜(HST)观测到的附近星系的恒星内容的信息。在这里,我们提供了这个目录的十年更新,现在已经增加了一倍,超过500个星系。我们强调了我们的数据减少和分析技术的补充,并提供了科学的例子,已经成为可能与这个大数据集。我们发现TRGB是一个可靠的距离测量,我们的目标是将其距离覆盖范围与HST扩展到10 Mpc内的每个星系。在不久的将来,詹姆斯·韦伯太空望远镜和南希·格雷斯·罗曼太空望远镜的结合将大大增加我们掌握的目标数量。

英文摘要:

The Extragalactic Distance Database (EDD) was created as a repository for high quality, redshift-independent distances. A key component of EDD is the Color Magnitude Diagrams/Tip of the Red Giant Branch (CMDs/TRGB) catalog, which provides information on the stellar content of nearby galaxies observed with the Hubble Space Telescope (HST). Here we provide a decadal update to this catalog, which has now doubled in size to over 500 galaxies. We highlight the additions to our data reduction and analysis techniques, and provide examples of the science that has been made possible with this large data set. We find the TRGB to be a reliable measure for distance, and we aim to extend its distance coverage with HST to every galaxy within 10 Mpc. In the near-future, the combination of the James Webb Space Telescope and the Nancy Grace Roman Space Telescope will dramatically increase the number of targets within our grasp.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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