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

  • M. Lemoine-Busserolle (a1), T. Contini (a2), O. Le Fèvre (a3), M. Kissler-Patig (a4) and the VVDS Consortium...

Abstract

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.

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