NGC 4945 - A postburst infrared galaxy

Details NGC 4945 - A postburst infrared galaxy NGC 4945 - A postburst infrared galaxy

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...403..581k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 403, no. 2, p. 581-591.

Astronomy and Astrophysics

Astronomy

39

Galactic Evolution, Infrared Sources (Astronomy), Spiral Galaxies, Emission Spectra, Galactic Nuclei, Infrared Spectroscopy, Molecular Excitation, Molecular Gases, Supernovae

Scientific paper

Long-slit near-IR spectrograph data of NGC 4945 allow the deduction of the existence of circumnuclear molecular H. The flat H I rotation curve which is valid for the bulk of the galaxy is inappropriate for the velocity distribution of the molecular material in the central kpc. Instead, a massive central star cluster induces Keplerian rotational velocities of 200-250 km/sec at a galactic radius of 100 parsec; at distances of 400-500 parsec from the nucleus, the velocities are of the order of 100 km/sec.

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