Physics
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..783..343m&link_type=abstract
THE EVOLUTION OF STARBURSTS: The 331st Wilhelm and Else Heraeus Seminar. AIP Conference Proceedings, Volume 783, pp. 343-348 (2
Physics
2
Galaxies, Brightness, Optical Images, Infrared Imaging, Galaxy Mergers, Collisions, And Tidal Interactions, Origin, Formation, Evolution, Age, And Star Formation, Magnitudes And Colors, Luminosities
Scientific paper
Interaction and merging are the two most important driving forces of galaxy evolution. In recent years, much research activity has been focused on ULIRGs, which are the result of a disk-disk merger, since they are among the most spectacular objects in the universe. However, ULIRGs are rare objects in the local universe. Thus, a study of a sample of merging galaxies of moderate FIR luminosity (~ 1010 - 1011Lsolar) may teach us as much as or even more about galaxy formation and evolution as investigations of the most extreme objects. Mergers having a moderate FIR luminosity can also be produced by merging two gas-rich galaxies with unequal mass or a spiral and an elliptical (S+E). Alternatively, they can be a result of a faded major merger. As a class, moderate luminosity mergers are poorly studied and their role in the overall process of galaxy evolution is not yet well understood. We have obtained multicolour optical and NIR imaging data, optical spectroscopy, HI and CO (i.e. molecular gas) data for a large part of a sample of moderate luminosity merger candidates. A cross section of the results will be presented, and some preliminary conclusions will be drawn. These include an assessment of the crucial question of the extent (and existence) of the starburst resulting from the merger - a dominating young stellar population and significant dust obscuration is indeed suggested for most of the sample galaxies.
Aalto Susanne
Haberzettl Lutz
Huttemeister Susanne
Manthey Eva
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