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Early-type dwarf galaxies with spiral structure

✍ Scribed by T. Lisker; R. Brunngräber; E.K. Grebel

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
365 KB
Volume
330
Category
Article
ISSN
0004-6337

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✦ Synopsis

Abstract

A significant fraction of Virgo cluster early‐type dwarf (dE) galaxies exhibit disk substructure, like spiral arms and bars. Are these disks the still visible remnants of late‐type progenitor galaxies that harassment transformed into dEs? Simulations of harassment predict tidal debris arcs around the remnants, as well as a distorted outer structure. We aimed at detecting such signatures by means of very deep ESO 2.2m/WFI images of dEs with weak spiral structure. Here, we present a preliminary analysis of these images and their implications (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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