Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...218...49v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 218, no. 1-2, July 1989, p. 49-66. Research supported by ZWO.
Astronomy and Astrophysics
Astrophysics
15
Disk Galaxies, Galactic Structure, Hydrogen Atoms, Angular Velocity, Astronomical Maps, Continuous Radiation, Density Distribution, Galactic Rotation, Spatial Distribution
Scientific paper
The NGC 3619, 3626, and 3900 galaxies were mapped in the 21-cm H-I line with a spatial resolution of about 30 arcsec and a velocity resolution of 40 km/s. An encounter with the nearby spiral NGC 3625, or a merge with a dwarf galaxy, some 0.5 to 10 to the 9th years ago may explain the optical and H-I properties of NGC 3619. The H-I distribution of S0/a galaxies is shown to resemble that of Sa, rather than S0, galaxies, suggesting an internal origin for the H-I gas in S0/a galaxies. The Tully-Fisher relation and total M/L ratios of S0/a galaxies are found to be similar to those of other types of galaxies.
Balkowski Ch.
Driel Wim van
van Woerden Hugo
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