The VLT LEGA-C spectroscopic survey : the physics of galaxies at a lookback time of 7 Gyr
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The Large Early Galaxy Census (LEGA-Ca) is a Public Spectroscopic Survey of ∼ 3200 K-band selected galaxies at redshifts z=0.6-1.0 with stellar masses M* > 1010M_sun, conducted with VIMOS on ESO's Very Large Telescope. The survey is embedded in the COSMOS field (R.A. =10h00; Dec.=+2deg). The 20-hour long integrations produce high-S/N continuum spectra that reveal ages, metallicities and velocity dispersions of the stellar populations. LEGA-C's unique combination of sample size and depth will enable us for the first time to map the stellar content at large look-back time, across galaxies of different types and star-formation activity. Observations started in December 2014 and are planned to be completed by mid 2018, with early data releases ofthe spectra and value-added products. In this paper we present thescience case, the observing strategy, an overview of the data reduction process and data products, and a first look at the relationship between galaxy structure and spectral properties, as it existed 7 Gyr ago.
van der Wel , A , Noeske , K , Bezanson , R , Pacifici , C , Gallazzi , A , Franx , M , Muñoz-Mateos , J C , Bell , E F , Brammer , G , Charlot , S , Chauké , P , Labbé , I , Maseda , M V , Muzzin , A , Rix , H-W , Sobral , D , van de Sande , J , van Dokkum , P G , Wild , V & Wolf , C 2016 , ' The VLT LEGA-C spectroscopic survey : the physics of galaxies at a lookback time of 7 Gyr ' Astrophysical Journal Supplement Series , vol 223 , no. 2 , pp. 29 . DOI: 10.3847/0067-0049/223/2/29
Astrophysical Journal Supplement Series
© 2016, The American Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at iopscience.iop.org / https://dx.doi.org/10.3847/0067-0049/223/2/29
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