A catalog of H I-selected galaxies from the south celestial cap region of sky

V. A. Kilborn, R. L. Webster, L. Staveley-Smith, M. Marquarding, G. D. Banks, D. G. Barnes, R. Bhathal, W. J.G. De Blok, P. J. Boyce, M. J. Disney, M. J. Drinkwater, R. D. Ekers, K. C. Freeman, B. K. Gibson, P. A. Henning, M. Howlett, H. Jerjen, P. M. Knezek, B. Koribalski, D. F. MalinR. F. Minchin, J. R. Mould, J. C. O'Brien, T. Oosterloo, P. F. Ortiz, R. M. Price, M. E. Putman, S. D. Ryder, E. M. Sadler, I. M. Stewart, F. Stootman, O. I. Wong, A. E. Wright

Research output: Contribution to journalReview ArticleResearchpeer-review

32 Citations (Scopus)

Abstract

The first deep catalog of the H I Parkes All Sky Survey (HIPASS) is presented, covering the south celestial cap (SCC) region. The SCC area is ∼2400 deg2 and covers δ < -62°. The average rms noise for the survey is 13 mJy beam-1. Five hundred thirty-six galaxies have been cataloged according to their neutral hydrogen content, including 114 galaxies that have no previous cataloged optical counterpart. This is the largest sample of galaxies from a blind H I survey to date. Most galaxies in optically unobscured regions of sky have a visible optical counterpart; however, there is a small population of low-velocity H I clouds without visible optical counterparts whose origins and significance are unclear. The rms accuracy of the HIP ASS positions is found to be 1.′9. The H I mass range of galaxies detected is from ∼106 to ∼10 11 M⊙. There are a large number of late-type spiral galaxies in the SCC sample (66%), compared with 30% for optically selected galaxies from the same region in the NASA Extragalactic Database. The average ratio of H I mass to B luminosity of the sample increases according to optical type, from 1. 8 M⊙/L⊙ for early types to 3.2 Ṁ/L̇ for late-type galaxies. The H I-detected galaxies tend to follow the large-scale structure traced by galaxies found in optical surveys. From the number of galaxies detected in this region of sky, we predict the full HIPASS catalog will contain ∼5000 galaxies, to a peak flux density limit of ∼39 mJy (3 σ), although this may be a conservative estimate as two large voids are present in the region. The H I mass function for this catalog is presented in a subsequent paper.

Original languageEnglish
Pages (from-to)690-705
Number of pages16
JournalThe Astronomical Journal
Volume124
Issue number2 1760
DOIs
Publication statusPublished - 1 Aug 2002
Externally publishedYes

Keywords

  • Catalogs
  • Galaxies: general
  • Surveys

Cite this