Molecular Gas in the Poststarburst Galactic Nucleus of NGC 4736

Details Molecular Gas in the Poststarburst Galactic Nucleus of NGC 4736 Molecular Gas in the Poststarburst Galactic Nucleus of NGC 4736

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasj...50..317s&link_type=abstract

Publications of the Astronomical Society of Japan, v.50, p.317-323.

Astronomy and Astrophysics

Astronomy

10

Galaxies: Active, Galaxies: Evolution, Galaxies: Individual (Ngc 4736), Stars: Formation

Scientific paper

We present (12) CO (J=1--0) observations of the poststarburst nucleus of NGC 4736. Although star in the nuclear region is currently inactive, there is a substantial amount of molecular gas, ~ 10(7 MO ) , in the central ~ 300 pc region. Comparing the observed molecular-gas surface density with the threshold gas density for star formation proposed by Kennicutt (1989, AAA 50.157.264), we find that the nuclear gas disk is stable for gravitational instability. We discuss possible scenarios for the nuclear starburst evolution of NGC 4736 in terms of either bar-driven instability fueling or minor-merger driven fueling (or triggering).

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