Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88..909s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 88, July 1983, p. 909-925.
Astronomy and Astrophysics
Astronomy
194
Astronomical Spectroscopy, Disk Galaxies, Galactic Evolution, Galactic Structure, Astronomical Photography, Galactic Rotation, Mass To Light Ratios, Mass Transfer, Precession
Scientific paper
A detailed optical study of A0136-0801, a newly discovered spindle galaxy, is presented, and the structure, origin, and evolution of ringed S0 galaxies in general are discussed. Photographic photometry and spectroscopy of the galaxy are described, and quantitative results are presented for the galaxy's morphology and geometry, photometry of the spindle, brightness and H I content of the ring, rotation of spindle and ring, and velocity dispersion of the spindle. The spindle is a normal S0 disk seen nearly edge-on; the ring motions suggest that a massive halo extends far beyond the S0 disk and is more spherical than flat. From a study of 22 related galaxies, it is found that a few percent of all field S0's possess near-polar rings or disks. It is suggested that these structures are due to a second event, most likely the transfer of mass from a companion galaxy during a close encounter and occasionally also the merger of a companion.
Rubin Vera Cooper
Schweizer Francois
Whitmore Bradley C.
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