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research article

A Population of Compact Elliptical Galaxies Detected with the Virtual Observatory

Chilingarian, Igor
•
Cayatte, Veronique
•
Revaz, Yves  
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2009
Science

Compact elliptical galaxies are characterized by small sizes and high stellar densities. They are thought to form through tidal stripping of massive progenitors. However, only a handful of them were known, preventing us from understanding the role played by this mechanism in galaxy evolution. We present a population of 21 compact elliptical galaxies gathered with the Virtual Observatory. Follow-up spectroscopy and data mining, using high-resolution images and large databases, show that all the galaxies exhibit old metal-rich stellar populations different from those of dwarf elliptical galaxies of similar masses but similar to those of more massive early-type galaxies, supporting the tidal stripping scenario. Their internal properties are reproduced by numerical simulations, which result in compact, dynamically hot remnants resembling the galaxies in our sample.

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Type
research article
DOI
10.1126/science.1175930
Web of Science ID

WOS:000272351100035

Author(s)
Chilingarian, Igor
•
Cayatte, Veronique
•
Revaz, Yves  
•
Dodonov, Serguei
•
Durand, Daniel
•
Durret, Florence
•
Micol, Alberto
•
Slezak, Eric
Date Issued

2009

Publisher

American Association for the Advancement of Science

Published in
Science
Volume

326

Start page

1379

End page

1382

Subjects

Digital Sky Survey

•

Dwarf Galaxies

•

Dark-Matter

•

Clusters

•

Discovery

•

Evolution

•

Objects

•

Origin

•

M32

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LASTRO  
Available on Infoscience
November 30, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/59580
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