Two-dimensional kinematics of SLACS lenses - IV. The complete VLT-VIMOS data set

Details Two-dimensional kinematics of SLACS lenses - IV. The complete VLT-VIMOS data set Two-dimensional kinematics of SLACS lenses - IV. The complete VLT-VIMOS data set

2011-08-02

arxiv.org/abs/1108.0577v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

13 pages, 7 figures, 2 tables; typos corrected; accepted for publication in MNRAS

Scientific paper

This paper presents the full VLT/VIMOS-IFU data set and related data products from an ESO Large Programme with the observational goal of obtaining two-dimensional kinematic data of early-type lens galaxies, out to one effective radius. The sample consists of 17 early-type galaxies (ETG) selected from the SLACS gravitational-lens survey. The galaxies cover the redshift range from 0.08 to 0.35 and have stellar velocity dispersions between 200 and 350 km/s. This programme is complemented by a similar observational programme on Keck, using long-slit spectroscopy. In combination with multi-band imaging data, the kinematic data provide stringent constraints on the inner mass profiles of ETGs beyond the local universe. Our Large Programme thus extends studies of nearby early-type galaxies (e.g. SAURON/ATLAS3D) by an order of magnitude in distance and toward higher masses. We provide an overview of our observational strategy, the data products (luminosity-weighted spectra and Hubble Space Telescope images) and derived products (i.e. two-dimensional fields of velocity dispersions and streaming motions) that have been used in a number of published and forthcoming lensing, kinematic and stellar-population studies.These studies also pave the way for future studies of early-type galaxies at z=1 with the upcoming extremely large telescopes.

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