CO in Markarian galaxies

Details CO in Markarian galaxies CO in Markarian galaxies

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...229...17k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 229, no. 1, March 1990, p. 17-27.

Astronomy and Astrophysics

Astrophysics

60

Carbon Monoxide, Markarian Galaxies, Astronomical Spectroscopy, Emission Spectra, Interstellar Gas, Interstellar Matter, Line Spectra, Rotating Bodies

Scientific paper

CO (1-0) and (2-1) emission has been measured with high spatial resolution toward the centers of 14 Markarian galaxies. While the shapes of the (2-1) and (1-0) line are generally similar, their intensity ratios vary between 0.4 and 3. This is due to different beam sizes and variations in physical conditions of the molecular ISM. (C-13)O (2-1) was detected in two galaxies. The CO/(C-13)O line intensity ratio is about 15. The different types of observed profiles are explained by models for an inclined rotating disk. It turns out that the spectra are the result of varying contributions from a rigidly rotating core and a surrounding disk with a flat rotation curve. Gas masses derived from the CO observations are compared with those obtained from the 1.3 mm dust continuum, and reasonable agreement between the different methods is found.

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