论文标题
苜蓿-SDSS星系目录
The ALFALFA-SDSS Galaxy Catalog
论文作者
论文摘要
我们根据100％完整的Arecibo Legacy快速Arecibo L波段进料阵列（Alfalfa）调查提供了约30,000个星系的高光目录，并结合了Sloan Digital Sky Survey（SDSS）的数据。我们的目标是通过为SDSS对应物提供精心确定的匹配，包括约12,000个没有SDSS Spectra的星系的匹配项，从而促进公开使用完整的苜蓿目录。这些标识可以为使用SDSS光度ID作为参考点进一步与其他调查进行进一步交叉匹配提供基础。我们使用光学颜色与具有活性恒星形成的小型和中间质量星系的内部红色校正相结合，为每个星系提供绝对大小和恒星质量。我们还提供了基于红外红外调查探险家（WISE）和/或Galaxy Evolution Explorer（Galex）检测到的星系的红外和/或紫外光度法的恒星质量和星形形成率。最后，我们将苜蓿-SDSS样本中的星系人群与其他几个公共可用的星系目录中的人群进行了比较，并确认苜蓿星系通常具有较低的质量和蓝色的颜色。
We present an HI-optical catalog of ~ 30,000 galaxies based on the 100% complete Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) survey combined with data from the Sloan Digital Sky Survey (SDSS). Our goal is to facilitate public use of the completed ALFALFA catalog by providing carefully determined matches to SDSS counterparts, including matches for ~ 12,000 galaxies that do not have SDSS spectra. These identifications can provide a basis for further cross-matching with other surveys using SDSS photometric IDs as a reference point. We derive absolute magnitudes and stellar masses for each galaxy using optical colors combined with an internal reddening correction designed for small- and intermediate-mass galaxies with active star formation. We also provide measures of stellar masses and star formation rates based on infrared and/or ultraviolet photometry for galaxies that are detected by the Wide-field Infrared Survey Explorer (WISE) and/or the Galaxy Evolution Explorer (GALEX). Finally, we compare the galaxy population in the ALFALFA-SDSS sample with the populations in several other publicly-available galaxy catalogs, and confirm that ALFALFA galaxies typically have lower masses and bluer colors.
