Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...203..237h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 203, no. 2, Sept. 1988, p. 237-249.
Astronomy and Astrophysics
Astrophysics
94
Astronomical Catalogs, Galactic Clusters, H I Regions, Irregular Galaxies, Spiral Galaxies, Galactic Evolution, Galactic Mass, Luminosity, Mass To Light Ratios, Spectral Line Width, Star Formation
Scientific paper
Global parameters for 146 galaxies in a nearly complete sample of nearby galaxies with v0 = 500 km/s or less are derived from H I observations. Relations among global parameters (e.g., morphological type, absolute magnitude, and corrected 21-cm line width) are discussed. The Tully-Fisher relation for this sample turns out to be very similar to the solution from the calibrating sample of 130 galaxies. Other relations providing distance information are discussed as well. The parameters representing total mass are involved in the tightest correlations found in this study. The total mass, the H I mass, and the blue luminosity are all approximately proportional to the disk surface area. The mass-to-light ratio is practically independent of morphological type. Likewise, the pseudo H I surface brightness can be represented by a constant value for all galaxies with types later than Sc.
Huchtmeier Walter K.
Richter Otto-Georg
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