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Hoag's object: the quintessential ring galaxy

Published online by Cambridge University Press:  05 March 2015

Noah Brosch ,
Ido Finkelman  and
Alexei Moiseev
Noah Brosch
Affiliation:
Tel Aviv University, Israel, email: noah@wise.tau.ac.il
Ido Finkelman
Affiliation:
Tel Aviv University, Israel, email: noah@wise.tau.ac.il
Alexei Moiseev
Affiliation:
Special Astrophysical Observatory of the Russian Academy of Sciences
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Abstract

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We present new observations of Hoag's Object, known as “the most perfect ring galaxy,“ that show that a preferred explanation for this object is (a) the formation of a triaxial elliptical galaxy some 10 Gyr ago, (b) the accretion of a large disk of neutral hydrogen at about the same time, (c) low-level star formation in the HI disk for all the time since that event triggered by the triaxial potential of the core.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Highlights H16: Highlights of Astronomy , August 2012 , pp. 368
Copyright
Copyright © International Astronomical Union 2015