An optical counterpart to the H I cloud in the local supercluster

Christopher D Impey, Gregory Bothun, David Malin, Lister Staveley-Smith

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We report the detection of an optical counterpart to the large H I cloud recently discovered by Giovanelli and Haynes in the Local Supercluster. The peak of the H I flux corresponds to a low surface brightness, dwarf irregular galaxy. The counterpart was discovered on a photographically amplified image from the UK Schmidt Telescope, and its maximum extent is 180″ at the 27 mag arcsec-2 isotope. We suggest that the H I and optical data can be explained by a pair of LSB dwarf irregular galaxies that have similar velocities. Some star formation appears to be taking place in this system, but the H I column density is below the threshold for extensive star formation. A kinematic study is required to determine the total mass. This galaxy is similar to other LSB dwarfs and dI pairs which have enormous mass-to-light ratios and H I sizes far in excess of the optical scale length.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume351
Issue number2 PART 2
StatePublished - Mar 10 1990

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irregular galaxies
dwarf galaxies
star formation
Schmidt telescopes
mass to light ratios
brightness
kinematics
isotopes
isotope
galaxies
thresholds
detection

Keywords

  • Galaxies: formation
  • Galaxies: stellar content
  • Galaxies: structure

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Impey, C. D., Bothun, G., Malin, D., & Staveley-Smith, L. (1990). An optical counterpart to the H I cloud in the local supercluster. Astrophysical Journal, 351(2 PART 2).

An optical counterpart to the H I cloud in the local supercluster. / Impey, Christopher D; Bothun, Gregory; Malin, David; Staveley-Smith, Lister.

In: Astrophysical Journal, Vol. 351, No. 2 PART 2, 10.03.1990.

Research output: Contribution to journalArticle

Impey, CD, Bothun, G, Malin, D & Staveley-Smith, L 1990, 'An optical counterpart to the H I cloud in the local supercluster', Astrophysical Journal, vol. 351, no. 2 PART 2.
Impey CD, Bothun G, Malin D, Staveley-Smith L. An optical counterpart to the H I cloud in the local supercluster. Astrophysical Journal. 1990 Mar 10;351(2 PART 2).
Impey, Christopher D ; Bothun, Gregory ; Malin, David ; Staveley-Smith, Lister. / An optical counterpart to the H I cloud in the local supercluster. In: Astrophysical Journal. 1990 ; Vol. 351, No. 2 PART 2.
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