Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110909s&link_type=abstract
American Astronomical Society, AAS Meeting #211, #109.09; Bulletin of the American Astronomical Society, Vol. 39, p.938
Astronomy and Astrophysics
Astronomy
Scientific paper
In a polar ring system, a ring of gas, dust and stars orbits almost over the pole of a central `host’ that is generally a gas-poor S0 or elliptical galaxy. Gas orbits in the ring and stellar orbits in the host galaxy sample the gravitational potential in two near-orthogonal planes. I will discuss how polar rings can be used as a rare probe of the shape of the galaxy's unseen halo. Results for nearby polar rings point to a wide dispersion in shape, from a nearly round halo to a halo that is almost as flattened as the luminous disk.
I would like to thank the National Science Foundation and UW-Madison for their support of my work on polar ring galaxies.
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