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Mass and kinematics of late-type galaxies (1.3 < z < 3.3) from the VVDS

Published online by Cambridge University Press:  01 July 2007

M. Lemoine-Busserolle
Affiliation:
Oxford Astrophysics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK email: mrlb@astro.ox.ac.uk.
T. Contini
Affiliation:
Laomp - UMR 5572, 14 Avenue E. Belin, F-31400 Toulouse, France
O. Le Fèvre
Affiliation:
LAM-Marseille, France
M. Kissler-Patig
Affiliation:
ESO, Karl-Schwarzschild-Str.2, 85748 Garching, Germany
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Abstract

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Galaxy kinematics at early epochs give a key insight into the assembly of mass. Redshifts z ~ 1 − 3 appear to be the peak of the star formation rate of the Universe, possibly corresponding to the maximal merger activity. 2D velocity fields of late-type galaxies can be used to put important constraints on its total mass and hence on its dark matter halo. As dark halos are thought to govern the rate of galaxy evolution, securing reliable mass measurements for early systems at high redshift is a fundamental observational goal. In addition, accurate inner shape rotation curves, only drawed by 3D spectroscopic studies, should allow to disentangle cosmological scenarii. In the purpose of probing the evolution in masses and mass-to-light ratios of the galaxies during an epoch of expected strong evolution, and setting constrains on their formation and evolution, we present preliminary results obtained from Integral Field NIR Spectroscopy with SINFONI/VLT of a first sample of ten high-z (1.3 < z < 3.3) late-type galaxies selected in the VIMOS/VLT Deep Survey (VVDS). The SINFONI NIR-IFU mode allow to spatially resolve galaxy dynamics using bright rest-frame optical emission lines, in order to perform statistical studies of dynamical masses at this early epochs.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2008