Tidal Streams in Newly Discovered Compact Elliptical (cE) Galaxies

Details Tidal Streams in Newly Discovered Compact Elliptical (cE) Galaxies Tidal Streams in Newly Discovered Compact Elliptical (cE) Galaxies

2010-09-16

arxiv.org/abs/1009.3185v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

2 pages, 3 figs, in Proc. of conference "A Universe of Dwarf Galaxies", Lyon, France, June 2010. New version with minor correc

Scientific paper

We present two newly-discovered, compact elliptical (cE) galaxies, which exhibit clear evidence of tidal steams, found in a search of SDSS DR7. The structural parameters of the cEs are derived using GALFIT and give effective radii < 400 pc. They also possess young to intermediate-age stellar populations. These two cEs provide direct evidence, a "smoking gun", for the process of tidal stripping that is believed to be the origin of M32-type galaxies. Both are found in small group environments with many late-type galaxies, suggesting that we may be seeing the formation of such galaxies in dynamically young galaxy groups.

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