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Dynamical masses of early-type galaxies at z ∼ 2: Are they truly superdense?

Abstract:

We measured stellar velocity dispersions σ and derived dynamical masses of nine massive (M ≈ 1011 M ⊙) early-type galaxies (ETGs) from the Galaxy Mass Assembly ultra-deep Spectroscopic Survey (GMASS) sample at redshift 1.4 ≲ z ≲ 2.0. The σ are based on individual spectra for two galaxies at z ≈ 1.4 and on a stacked spectrum for seven galaxies with 1.6 < z < 2.0, with 202 hr of exposure at the ESO Very Large Telescope. We constructed detailed axisymmetric dynamical models for the objects...

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Publisher copy:
10.1088/0004-637X/704/1/L34

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Role:
Author
Publisher:
Institute of Physics Publishing
Journal:
Astrophysical Journal More from this journal
Volume:
704
Issue:
1 PART 2
Publication date:
2009-01-01
DOI:
EISSN:
1538-4357
ISSN:
0004-637X
Language:
English
Keywords:
Pubs id:
pubs:345209
UUID:
uuid:cce096c7-e83c-4718-a047-700ec39aa39d
Local pid:
pubs:345209
Source identifiers:
345209
Deposit date:
2012-12-19

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