Neutral hydrogen distribution and velocity structure of some early-type galaxies

Abstract

view Abstract Citations (59) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Neutral hydrogen distribution and velocity structure of some early-type galaxies. Krumm, N. ; Salpeter, E. E. Abstract Sixteen disk galaxies of early type, detected in a systematic survey, were mapped in neutral hydrogen with the 3.2-arcmin Arecibo beam. More than half of the galaxies have extended neutral hydrogen emission. Hydrogen masses and radii tend to be smaller for galaxies in the Virgo cluster core than outside of it. Galaxies with extended emission satisfy a 'Tully-Fisher relation' (velocity width versus luminosity) similar to that for late-type spirals. For five galaxies a rotation curve was obtained: three of the curves are flat, and two appear similar to that of M81. Mass-to-luminosity ratios estimated for these five cases are also similar to those for spirals. For at least two galaxies (possibly four) the 21 cm line has a very narrow profile, and the neutral hydrogen must be concentrated in a small region near the nucleus. Publication: The Astrophysical Journal Pub Date: February 1979 DOI: 10.1086/156822 Bibcode: 1979ApJ...228...64K Keywords: Galactic Clusters; Hydrogen Clouds; Mass Distribution; Radio Galaxies; Spiral Galaxies; Velocity Distribution; Galactic Nuclei; Galactic Rotation; Line Spectra; Luminous Intensity; Microwave Emission; Neutral Particles; Astrophysics; Clusters of Galaxies:Virgo; Early-Type Galaxies:Neutral Hydrogen; Galaxies:Internal Motions full text sources ADS | data products NED (18)