Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...325..923h&link_type=abstract
Astronomy and Astrophysics, v.325, p.923-932
Astronomy and Astrophysics
Astrophysics
22
Galaxies: Individual: Ngc 253, Galaxies: Kinematics And Dynamics, Radio Lines: Ism
Scientific paper
The distribution of ^12^CO(1-0) has been mapped over the spiral galaxy NGC 253 using the Swedish-ESO Submillimetre Telescope (SEST). Emission was found to extend 22.4arcmin along the major axis and to be concentrated towards the nucleus with an LSR systemic velocity of 235km/s. The CO intensity and velocity distribution suggests three subsystems: a dense, highly-rotating nuclear cloud, a disk (with a line of nodes at a position angle of 63°) extending 150arcsec each side of the nucleus containing a bar or spiral arms that are located at an azimuth of 21°, and an outer disk with a position angle of 52°. The total gas mass derived for the full extent is 2.4x10^9^Msun_, about 2% of the calculated dynamic mass of 10.5x10^10^Msun_.
Booth Rex
Houghton Sally
Koribalski Baerbel
Whiteoak John B.
Wielebinski Richard
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