CO J = 2-1 observations of the central region of NGC 3628

Details CO J = 2-1 observations of the central region of NGC 3628 CO J = 2-1 observations of the central region of NGC 3628

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237...17i&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 1, Oct. 1990, p. 17-20.

Astronomy and Astrophysics

Astrophysics

13

Active Galactic Nuclei, Carbon Monoxide, Emission Spectra, Galactic Structure, Galactic Mass, Galactic Radiation, Rotating Disks

Scientific paper

A fully sampled map at 21-arcsec resolution of the J = 2-1 CO emission from the center of the interacting galaxy NGC 3628 in the Leo triplet is presented. Earlier conclusions that the center contains a strong CO concentration of major axis diameter 14 arcsec are confirmed. The mass of this concentration is of order 3 x 10 to the 7th solar, or 5 percent of the total mass of stars and gas in the center. The molecular concentration is probably coincident with the rotating disk seen in H I absorption. The H2 to CO conversion factor of the NGC 3628 core appears to be lower than that of the disk of the Galaxy by a factor of about five, suggesting that the CO in the core of NGC 3628 is rather warm. The core of NGC 3628 does not appear to be the site of a starburst.

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