Abstract
view Abstract Citations (53) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS 101 spiral galaxies : neutral hydrogen distribution. Krumm, N. ; Salpeter, E. E. Abstract The neutral hydrogen properties of spiral galaxies have been measured at the Arecibo Observatory using a 21 cm spectral line system. One hundred and thirty galaxies were observed, and 101 have been detected and roughly mapped in H I. The data are used to derive the total mass of neutral hydrogen gas, the gravitational mass, and a Gaussian hydrogen diameter for some galaxies. A large scatter in H I diameters within each Hubble type is reported and Sc galaxies appear to have smaller H I diameters than Sb galaxies. Sb galaxies also show a strong tendency to have asymmetric H I distributions. The H I profile is measured with the width at 50% the peak flux, and comparisons are made with the Green Bank method. Publication: The Astronomical Journal Pub Date: October 1980 DOI: 10.1086/112801 Bibcode: 1980AJ.....85.1312K Keywords: Galactic Structure; Hydrogen Clouds; Neutral Gases; Spiral Galaxies; Astronomical Catalogs; Centimeter Waves; Luminous Intensity; Statistical Analysis; Astrophysics full text sources ADS | data products SIMBAD (102) NED (101)
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