Far UV and X-ray observation: a hot view of shell galaxies

Details Far UV and X-ray observation: a hot view of shell galaxies Far UV and X-ray observation: a hot view of shell galaxies

2008-01-15

arxiv.org/abs/0801.2327v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, Proceedings of the 1st. NUVA Conference, Space Astronomy: the UV window to the Universe, Madrid 2007

Scientific paper

Shell galaxies are considered the debris of recent accretion/merging episodes. Their high frequency in low density environments suggest that such episodes could drive the secular evolution for at least some fraction of the early-type galaxy population. We present here the preliminary results of ultraviolet and X-ray data for a sample of three shell galaxies, namely NGC 474, NGC 7070A and ESO 2400100. The Far UV morphology and photometry are derived using the observations obtained with the Galaxy Evolution Explorer and the XMM- Newton Optical Monitor. We aim at investigating the rejuvenation processes in the stellar population using the UV information as well as at gaining information about the possible evolution with time of the X-ray emission due interaction/merging processes.

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