Other
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..783..355h&link_type=abstract
THE EVOLUTION OF STARBURSTS: The 331st Wilhelm and Else Heraeus Seminar. AIP Conference Proceedings, Volume 783, pp. 355-360 (2
Other
2
Galaxies, Interstellar Matter, Hydrogen, Infrared Sources (Astronomical), Brightness, Starburst Galaxies And Infrared Excess Galaxies, Molecular Clouds, H2 Clouds, Dense Clouds, And Dark Clouds, Infrared Emission
Scientific paper
We report about a search for pre-starburst phenomena in colliding galaxy pairs which would represent a newly identified phase in the evolution of starbursts. We find exceptional λ=9.66μm v=0-0 S(3) H2 line emission of the Antennae galaxies. It arises mainly from the disk overlap region between the two nuclei. The H2 line luminosity, normalized by the far-infrared luminosity which traces the already active starburst contribution, exceeds that known for other infrared luminous galaxies. This excess implies that most of the gas clouds are in a pre-starburst phase shocked by the initial disk collisions and that new starbursts will be created soon. Our data reveal that much of the gas in the Antennae galaxies is in the exceptional and long sought-after phase before the onset of new starbursts.
Chini Rolf
Haas Martin
Klaas Ulrich
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