Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...133..127k&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 133, no. 1, April 1984, p. 127-136. Research supported by the Nederlandse Orga
Astronomy and Astrophysics
Astrophysics
22
Disk Galaxies, Galactic Structure, Hydrogen Atoms, Interstellar Gas, Density Distribution, Elliptical Galaxies, Galactic Evolution, Gas Density, Gas Flow, Lenticular Bodies, Milky Way Galaxy
Scientific paper
The H I-rich S0/a galaxy NGC 7013 was mapped in the H I line with a spatial resolution of 25arcsec×50arcsec (α×δ) and a velocity resolution of 33 km s-1. On the large scale, the H I distribution may be described by two rings, the larger at the edge of the optical disc and the smaller possibly associated with the inner stellar ring in the galaxy. The H I surface density in the disc itself is very low. The authors suggest that NGC 7013 is a former late-type spiral in which the H I density in the disc has become too low for significant star formation. The presence of the outer H I ring in the galaxy makes it unlikely that this is due to external sweeping.
Driel Wim van
Gallagher John S. III
Knapp Gillan R.
Schwarz Ulrich J.
van Woerden Hugo
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