Spatial Distribution of the Starbursts in Post-Starburst Coma Cluster Galaxies

Details Spatial Distribution of the Starbursts in Post-Starburst Coma Cluster Galaxies Spatial Distribution of the Starbursts in Post-Starburst Coma Cluster Galaxies

1995-10-05

arxiv.org/abs/astro-ph/9510032v1

Astronomy and Astrophysics

Astrophysics

22 pages + 13 of 15 figures, uuencoded gzipped postscript. Text and Figs 9 and 10 also available at ftp://flwo99.sao.arizona.e

Scientific paper

10.1086/117762

We present long slit spectra and multi-color CCD images which demonstrate that the strong star formation episodes that occurred in the post-starburst galaxies in the Coma Cluster and two field galaxies were not restricted to the central regions of the galaxies. Rather, the remnant young stars from the starbursts are found to be distributed over a large radius, though changes in the relative strength of the old and young components with radius are evident in a few cases. The Coma galaxies are shown to have exponential disk profiles, and the spectra provide further kinematical evidence that the galaxies are rotating systems, indicating that the galaxies are not ellipticals. The starburst material also appears to be distributed in disks. Such information places constraints on models for the starbursts that involve mergers. Some emission line galaxies are also discussed.

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