Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..115y&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 1, 1988, p. 115-122. Research supported by NASA and Alfred P. Slo
Astronomy and Astrophysics
Astrophysics
34
Astronomical Maps, Carbon Monoxide, Galactic Nuclei, Molecular Clouds, Astronomical Photometry, Emission Spectra, H Alpha Line, Millimeter Waves, Radio Interferometers, Spatial Distribution
Scientific paper
In order to determine the extent to which several unusual features of NGC 3079 are related to present-day star formation, the authors have undertaken a study to determine the distribution of molecular clouds in this galaxy at high resolution. They report aperture synthesis observations of the CO emission at 2.6 mm in the central 1arcmin of NGC 3079, single-dish CO mapping along the major axis, and Hα imaging of NGC 3079. The CO emission in the center of NGC 3079 is localized in a disk which is 660 pc in radius and which contains 5.7×109M_sun; of molecular gas. The kinematics of the molecular clouds suggest rotation, and the H2 accounts for ≡20% of the dynamical mass in this region. The ratio LIR/M(H2) indicates that star-formation efficiency in the galaxy is not exceptionally high. A mechanism for the accumulation of a large mass of molecular clouds at the nucleus of NGC 3079 is briefly discussed.
Claussen Mark J.
Scoville Nick Z.
Young Judith S.
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