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The Extragalactic Distance Database: The Color–Magnitude Diagrams/Tip of the Red Giant Branch Distance Catalog
The Astronomical Journal ( IF 5.1 ) Pub Date : 2021-07-30 , DOI: 10.3847/1538-3881/ac0440
Gagandeep S. Anand 1 , Luca Rizzi 2 , R. Brent Tully 1 , Edward J. Shaya 3 , Igor D. Karachentsev 4 , Dmitry I. Makarov 4 , Lidia Makarova 4 , Po-Feng Wu 5 , Andrew E. Dolphin 6 , Ehsan Kourkchi 1
Affiliation  

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.



中文翻译:

河外距离数据库:红巨星分支距离目录的颜色-星等图/提示

河外距离数据库 (EDD) 是作为高质量、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红巨星分支的颜色-星等图/尖端 (CMDs/TRGB) 目录,它提供了有关使用哈勃太空望远镜 (HST) 观察到的附近星系的恒星含量的信息。在这里,我们对这个目录进行了十年更新,现在它的大小增加了一倍,超过 500 个星系。我们重点介绍了我们的数据缩减和分析技术的新增功能,并提供了使用此大数据集实现的科学示例。我们发现 TRGB 是一种可靠的距离测量方法,我们的目标是通过 HST 将其距离覆盖范围扩展到 10 Mpc 内的每个星系。在不远的将来,

更新日期:2021-07-30
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