SIMBAD references

2013MNRAS.428.2980R - Mon. Not. R. Astron. Soc., 428, 2980-2994 (2013/February-1)

Virgo cluster and field dwarf ellipticals in 3D - I. On the variety of stellar kinematic and line-strength properties.

RYS A., FALCON-BARROSO J. and VAN DE VEN G.

Abstract (from CDS):

We present the first large-scale stellar kinematic and line-strength maps for dwarf elliptical galaxies (nine in the Virgo cluster and three in the field environment) obtained with the SAURON (Spectrographic Areal Unit for Research on Optical Nebulae) integral-field unit. No two galaxies in our sample are alike: we see that the level of rotation is not tied to flattening (we have, e.g., round rotators and flattened non-rotators); we observe kinematic twists in one Virgo and one field object; we discover large-scale kinematically decoupled components in two field galaxies; we see varying gradients in line-strength maps, from nearly flat to strongly peaked in the centre. The great variety of morphological, kinematic and stellar population parameters seen in our data points to a formation scenario in which properties are shaped stochastically. A combined effect of ram-pressure stripping and galaxy harassment is the most probable explanation. We show the need for a comprehensive analysis of kinematic, dynamical and stellar population properties which will enable us to place dwarf ellipticals and processes that govern their evolution in the wider context of galaxy formation.

Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

Journal keyword(s): galaxies: dwarf - galaxies: evolution - galaxies: formation - galaxies: kinematics and dynamics - galaxies: stellar content

Simbad objects: 17

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2021.06.24-17:17:33

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