The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic HI Source Catalog

Martha P. Haynes*, Riccardo Giovanelli, Brian R. Kent, Elizabeth A. K. Adams, Thomas J. Balonek, David W. Craig, Derek Fertig, Rose Finn, Carlo Giovanardi, Gregory Hallenbeck, Kelley M. Hess, G. Lyle Hoffman, Shan Huang, Michael G. Jones, Rebecca A. Koopmann, David A. Kornreich, Lukas Leisman, Jeffrey Miller, Crystal Moorman, Jessica O'ConnorAileen O'Donoghue, Emmanouil Papastergis, Parker Troischt, David Stark, Li Xiao

*Corresponding author for this work

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Abstract

We present the catalog of similar to 31,500 extragalactic H I line sources detected by the completed Arecibo Legacy Fast ALFA (ALFALFA) survey out to z <0.06, including both high signal-to-noise ratio (>6.5) detections and ones of lower quality that coincide in both position and recessional velocity with galaxies of known redshift. We review the observing technique, data reduction pipeline, and catalog construction process, focusing on details of particular relevance to understanding the catalog's compiled parameters. We further describe and make available the digital H I line spectra associated with the cataloged sources. In addition to the extragalactic H I line detections, we report nine confirmed OH megamasers (OHMs) and 10 OHM candidates at 0.16 z <0.22 whose OH line signals are redshifted into the ALFALFA frequency band. Because of complexities in data collection and processing associated with the use of a feed-horn array on a complex single-dish antenna in the terrestrial radio frequency interference environment, we also present a list of suggestions and caveats for consideration by users of the ALFALFA extragalactic catalog for future scientific investigations.

Original languageEnglish
Article number49
Number of pages19
JournalAstrophysical Journal
Volume861
Issue number1
DOIs
Publication statusPublished - 1-Jul-2018

Keywords

  • catalogs
  • galaxies: distances and redshifts
  • methods: data analysis
  • radio lines: galaxies
  • surveys techniques: imaging spectroscopy
  • I MASS FUNCTION
  • TULLY-FISHER RELATION
  • VIRGO CLUSTER REGION
  • EARLY-TYPE GALAXIES
  • ALL-SKY SURVEY
  • STAR-FORMATION
  • NEUTRAL HYDROGEN
  • NEARBY GALAXIES
  • DATA STACKING
  • SC GALAXIES
  • ALFALFA extragalactic HI source catalog

    Haynes, M. P. (Contributor), Giovanelli, R. (Contributor), Kent, B. R. (Contributor), Adams, B. (Contributor), Balonek, T. J. (Contributor), Craig, D. W. (Contributor), Finn, R. (Contributor), Fertig, D. (Contributor), Giovanardi, C. (Contributor), Hallenbeck, G. (Contributor), Hess, K. (Contributor), Hoffman, G. L. (Contributor), Huang, S. (Contributor), Jones, M. G. (Contributor), Koopmann, R. A. (Contributor), Kornreich, D. A. (Contributor), Leisman, L. (Contributor), Miller, J. (Contributor), Moorman, C. (Contributor), O'Connor, J. (Contributor), O'Donoghue, A. (Contributor), Papastergis, M. (Contributor), Troischt, P. (Contributor), Stark, D. (Contributor) & Xiao, L. (Contributor), University of Groningen, 7-Aug-2019

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