Excitation and kinematics of the central molecular clouds of NGC 1808

Details Excitation and kinematics of the central molecular clouds of NGC 1808 Excitation and kinematics of the central molecular clouds of NGC 1808

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994stin...9510757a&link_type=abstract

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Computer Science

Molecular Clouds, Molecular Excitation, Molecular Gases, Spiral Galaxies, Asymmetry, Carbon Monoxide, Emission Spectra, Line Spectra, Molecular Spectra, Radio Spectra, Velocity Distribution

Scientific paper

We have mapped the central region of the spiral galaxy NGC 1808 in the 12 CO J=1-0, J=2-1, J=3-2 lines. NGC 1808 has highly concentrated 12 CO emission and an asymmetrical velocity field in 12 CO that shows distinct peaks on both sides of center. The line intensity ratios indicate that the central molecular gas of NGC 1808 is in a state of high excitation compared with giant molecular clouds in the disk of the Milky Way. We present a 'two-phase' model that can explain the observations.

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