The Kinematics of the Ionized and Molecular Hydrogen in the Starburst Galaxy NGC 253

Bibcode
1996ApJ...458..537P
DOI
10.1086/176837
Prada, F.; Manchado, A.; Canzian, Blaise; Peletier, R. F.; McKeith, C. D.; Beckman, J. E.
Bibliographical reference

Astrophysical Journal v.458, p.537

Advertised on:
2
1996
Number of authors
6
IAC number of authors
2
Citations
17
Refereed citations
17
Description
Near-infrared H2 1-0 5(1) and Brγ velocity curves along the major axis of NGC 253 have revealed a central velocity gradient that is 7 times steeper than that shown by the optical velocity curve. This is interpreted as an optical depth effect due to dust. Approximately 35 mag of visual extinction in the center is required to match the southwest side of the optical velocity curve. The spatial variation of the ratio of these lines to the 12CO (J = 1 → 0) line is compared among starburst galaxies NGC 253, M82, and NGC 4945 to investigate the excitation mechanism responsible for the H2 1-0 S(1) line.
Type
Refereed
Galaxies
Extinction

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