CO observations of the SAB galaxies NGC 157, 2903, 4321, and 5248, and the Seyfert galaxy NGC 1068

Details CO observations of the SAB galaxies NGC 157, 2903, 4321, and 5248, and the Seyfert galaxy NGC 1068 CO observations of the SAB galaxies NGC 157, 2903, 4321, and 5248, and the Seyfert galaxy NGC 1068

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aj.....87..626e&link_type=abstract

Astronomical Journal, vol. 87, Apr. 1982, p. 626-634.

Astronomy and Astrophysics

Astronomy

20

Astronomical Maps, Astronomical Spectroscopy, Carbon Monoxide, Emission Spectra, Line Spectra, Seyfert Galaxies, Angular Resolution, Cosmic Dust, Galactic Structure, H Ii Regions, Hydrogen, Spectrum Analysis, Stellar Evolution, Velocity Distribution

Scientific paper

Extragalactic carbon monoxide emission regions can, in principle, be located more precisely than the telescope beamwidth by using optically derived velocity distributions which have much higher angular resolution. Using this technique, the CO emission from five distant galaxies was analyzed. CO emission from NGC 1068 is strongest in the central region. In NGC 4321, it is strongest in the long bright spiral arms. CO emission from NGC 157 and NGC 2903 occurs more uniformly over the disk of these galaxies; the H II regions and dust clouds are more uniformly distributed in these galaxies as well. In NGC 157, the CO is brightest from the area including the NE spiral arm, which has more continuity and bright star formation than the SW arm. These results agree with the expectation that CO emission should be intensified near the H II regions and obvious dust clouds that usually concentrate near the spiral arms.

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