Early-type dwarf galaxies with spiral structure

Details Early-type dwarf galaxies with spiral structure Early-type dwarf galaxies with spiral structure

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009an....330..966l&link_type=abstract

Astronomische Nachrichten, Vol.330, Issue , p.966

Astronomy and Astrophysics

Astronomy

1

Galaxies: Dwarf, Galaxies: Elliptical And Lenticular, Cd, Galaxies: Structure

Scientific paper

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 2.2 m/WFI images of dEs with weak spiral structure. Here, we present a preliminary analysis of these images and their implications.
Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere, Chile (programme 077.B-0785)

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