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The Outer Halos of Early-Type Galaxies

Published online by Cambridge University Press:  10 April 2015

Ortwin Gerhard ,
Magda Arnaboldi  and
Alessia Longobardi
Ortwin Gerhard
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, Giessenbachstr. 1, 85741 Garching, Germany. email: gerhard@mpe.mpg.de, alongobardi@mpe.mpg.de
Magda Arnaboldi
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany. e-mail: marnabol@eso.org
Alessia Longobardi
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, Giessenbachstr. 1, 85741 Garching, Germany. email: gerhard@mpe.mpg.de, alongobardi@mpe.mpg.de
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Abstract

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The outer halos of massive early-type galaxies (ETGs) are dark matter dominated and may have formed by accretion of smaller systems during galaxy evolution. Here a brief report is given of some recent work on the kinematics, angular momentum, and mass distributions of simulated ETG halos, and of corresponding properties of observed halos measured with planetary nebulae (PNe) as tracers. In the outermost regions of the Virgo-central galaxy M87, the PN data show that the stellar halo and the co-spatial intracluster light are distinct kinematic components.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S311: Galaxy Masses as Constraints of Formation Models , July 2014 , pp. 31 - 35
Copyright
Copyright © International Astronomical Union 2015 

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