The thickness of the hydrogen layer of the edge-on dwarf galaxy NGC 5023

Details The thickness of the hydrogen layer of the edge-on dwarf galaxy NGC 5023 The thickness of the hydrogen layer of the edge-on dwarf galaxy NGC 5023

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...167...34b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 167, no. 1, Oct. 1986, p. 34-40.

Astronomy and Astrophysics

Astrophysics

31

Accretion Disks, Disk Galaxies, Dwarf Galaxies, Hydrogen, Spiral Galaxies, Gas Density, Luminosity, Mass Distribution

Scientific paper

The authors present H I-synthesis observations of the edge-on dwarf galaxy NGC 5023. These data surprisingly reveal that the thickness of the H I layer does not vary with galactocentric distance and is apparently similar to that of the stellar disk. This is consistent with the observed colour index of the disk which shows star formation at all z-distances. It follows also that the velocity dispersion of the H I-gas and the stellar disk must be similar throughout the galaxy. This most likely implies that the gas varies its velocity dispersion with radius in this dwarf system, unlike in large late-type spirals.

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