Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...319...67h&link_type=abstract
Astronomy and Astrophysics, v.319, p.67-73
Astronomy and Astrophysics
Astrophysics
23
Surveys, Galaxies: Ism, Distances And Redshifts, Large-Scale-Structure, Galaxies: Interactions, Radio Lines: Galaxies
Scientific paper
We report HI-observations of a sample of 43 optically selected galaxies from the Heidelberg-void project. Only emission line galaxies have been selected. The HI-detection rate was 67%. The observed sample is a mix in late-type morphology objects with a spread in luminosity. They were compared to other samples with similar selection effects and mixtures. The detected galaxies have a high HI content and their M_HI_/L_B_ values are systematically higher than expected from a local field comparison sample. Especially, for the 10 dwarfs in our sample (8.2<=logL_B_<=9.2) which appear to be highly isolated, a mean M_HI_/L_B_=1.8 was derived which is higher than for all comparison samples, including those with the same restricted luminosity range. We discuss a trend in our data between the relative HI-content and the surrounding galaxy density holding from very high densities (Virgo-cluster) to the very isolated objects at the rims of the voids. We also present HI observations of 7 HII-galaxies of the University of Michigan (UM) sample.
Hopp Ulrich
Huchtmeier Walter K.
Kuhn B.
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