Molecular clouds in a polar ring

Details Molecular clouds in a polar ring Molecular clouds in a polar ring

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...259l..65c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 259, no. 2, p. L65-L68.

Astronomy and Astrophysics

Astrophysics

17

Carbon Monoxide, Disk Galaxies, Elliptical Galaxies, Molecular Clouds, Ring Galaxies, Galactic Rotation, Interacting Galaxies, Star Formation

Scientific paper

We have detected CO emission from the polar ring out of the plane of the SBa spiral NGC 660. We infer a total H2 mass in the polar ring (of radius 12 kpc) of 10 exp 9 solar masses, while there is 3.7 10 exp 9 solar masses in the main disk (inside 4 kpc). We propose a geometrical model that accounts for CO and HI observations. In this model, the polar ring is highly inclined with respect to the pole of the NGC 660 galaxy, and highly warped. The stability of such an inclined and warped ring is a challenge for the theories of polar ring formation.

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