Astronomy and Astrophysics – Astronomy
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.4026b&link_type=abstract
American Astronomical Society Meeting 204, #40.26; Bulletin of the American Astronomical Society, Vol. 36, p.721
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the highest angular resolution ( 0.5 arcsec) and most sensitive CO(2-1) and (1-0) observations ever made of the nuclear region of the nearby late type (Scd) spiral galaxy NGC 6946. The data - obtained with the Plateau de Bure interferometer - allow a study of the kinematics of the elongated molecular gas disk. The disk - which has a size of about 12 arcsec - is unresolved in existing data. The kinematic information is crucial to identify the mechanism(s) that funnel large amounts of molecular gas into the very nucleus of NGC 6946, which is currently undergoing a major starburst. The observations provide a test of models which suggest nuclear gas spirals inside the inner Lindblad resonance (ILR) as a possible funneling mechanism. In addition, quantifying the inflow rate yields constraints the ``duty cycle'' of nuclear starbursts in NGC 6946.
Boeker Torsten
Emsellem Eric
Lisenfeld Ute
Schinnerer Eva
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