arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.3670astro-ph.CO
收藏

河外距离数据库:全数字化HI剖面目录

The Extragalactic Distance Database: All Digital HI Profile Catalog

Helene M Courtois, R B Tully, J R Fisher, N Bonhomme, M Zavodny, A Barnes

摘要:

http://edd.ifa.hawaii.edu上的河外距离数据库(EDD)的一个重要组成部分是一组与HI线轮廓参数测量有关的星表。其中之一是全数字HI目录,它包含了新数据和旧数据的信息。新数据来自阿雷西博和帕克斯望远镜以及绿岸望远镜(GBT)的观测结果,包括自NRAO宇宙流大型计划获得以来的持续输入。旧的数据是从档案中收集的,特别是康奈尔大学数字HI档案,南凯望远镜河外HI档案和澳大利亚望远镜档案。该目录目前包含与约13,000个星系有关的约15,000个剖面的信息。每个通道的通道流量文件,无论来自哪个源,都通过一个公共管道进行。最感兴趣的导出参数是W_m50,即平均通量的50%处的轮廓宽度。在适当的调整之后,导出参数W_mx,即在倾斜校正之前统计上近似于峰到峰最大旋转速度的线宽,2 V_max sin(i)。

英文摘要:

An important component of the Extragalactic Distance Database (EDD) at http://edd.ifa.hawaii.edu is a group of catalogs related to the measurement of HI line profile parameters. One of these is the All Digital HI catalog which contains an amalgam of information from new data and old. The new data results from observations with Arecibo and Parkes telescopes and with the Green Bank Telescope (GBT), including continuing input since the award of the NRAO Cosmic Flows Large Program. The old data has been collected from archives, wherever available, particularly the Cornell University Digital HI Archive, the Nancay Telescope extragalactic HI archive, and the Australia Telescope archive. The catalog currently contains information on ~15,000 profiles relating to ~13,000 galaxies. The channel - flux per channel files, from whatever source, are carried through a common pipeline. The derived parameter of greatest interest is W_m50, the profile width at 50% of the mean flux. After appropriate adjustment, the parameter W_mx is derived, the linewidth which statistically approximates the peak to peak maximum rotation velocity before correction for inclination, 2 V_max sin(i).

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。

↑