The ALFALFA-SDSS Galaxy Catalog
Adriana Durbala (Department of Physics, Astronomy, University of, Wisconsin - Stevens Point, USA), Rose A. Finn (Department of Physics and, Astronomy, Siena College, USA), Mary Crone Odekon (Department of Physics,, Skidmore College, USA)

TL;DR
This paper presents a comprehensive HI-optical galaxy catalog combining ALFALFA and SDSS data, providing detailed galaxy properties and cross-matching for enhanced research utility.
Contribution
It offers the first extensive matched catalog of ~30,000 galaxies with derived physical properties and cross-survey identifications, including many without SDSS spectra.
Findings
ALFALFA galaxies are generally lower mass and bluer than other galaxy populations.
The catalog includes derived stellar masses and star formation rates for a large sample.
Provides a valuable resource for galaxy evolution studies and cross-survey analyses.
Abstract
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…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Astronomical Observations and Instrumentation · Gamma-ray bursts and supernovae
