SIMBAD references

2006AJ....131.2056W - Astron. J., 131, 2056-2073 (2006/April-0)

Stellar and gas properties of high H I Mass-to-Light ratio galaxies in the local universe.


Abstract (from CDS):

We present a multiwavelength study (BVRI-band photometry and H I line interferometry) of nine late-type galaxies selected from the HIPASS Bright Galaxy Catalog on the basis of apparently high H I mass-to-light ratios (3 M/L☉,B<M_HI/LB_<27 M/L☉,B). We find that most of the original estimates for M_HI/LB_based on available photographic magnitudes in the literature were too high and conclude that genuine high H I mass-to-light ratio (>5 M/L☉,B) galaxies are rare in the local universe. Extreme high-M_HI/LB_ galaxies such as ESO 215-G?009 appear to have formed only the minimum number of stars necessary to maintain the stability of their H I disks and could possibly be used to constrain galaxy formation models. They may also have been forming stars at a low, constant rate over their lifetimes. The best examples all have highly extended H I disks, are spatially isolated, and have normal baryonic content for their total masses but are deficient in stars. This suggests that high-M_HI/LB_galaxies are not lacking the baryons to create stars but are underluminous, as they lack either the internal or external stimulation for more extensive star formation.

Abstract Copyright:

Journal keyword(s): Galaxies: Dwarf - Galaxies: Evolution - galaxies: individual (ATCA J061608-574552) - galaxies: individual (ESO 121-G020) - Galaxies: Individual: Alphanumeric: ESO 215-G?009 - galaxies: individual (ESO 348-G009) - galaxies: individual (ESO 428-G033) - galaxies: individual (ESO 473-G024) - galaxies: individual (ESO 505-G007) - galaxies: individual (ESO 572-G009) - galaxies: individual (IC 4212) - galaxies: individual (MCG -04-02-003) - Galaxies: Irregular - Galaxies: ISM - Galaxies: Kinematics and Dynamics - Galaxies: Photometry

Nomenclature: Fig. 2, Tables 4+6: [WJK2006] ATCA J061608-574552 N=1.

CDS comments: ATCA companion of ESO 121-20 = EQ J061608-574552

Simbad objects: 27

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