LEGA-C DR2: galaxies in the COSMOS field

DOI

We present the second data release of the Large Early Galaxy Astrophysics Census (LEGA-C), an ESO 130-night public spectroscopic survey conducted with VIMOS on the Very Large Telescope. We release 1988 spectra with typical continuum S/N~20{AA}^-1^ of galaxies at 0.6<~z<~1.0, each observed for ~20hr and fully reduced with a custom-built pipeline. We also release a catalog with spectroscopic redshifts, emission-line fluxes, Lick/IDS indices, and observed stellar and gas velocity dispersions that are spatially integrated quantities, including both rotational motions and genuine dispersion. To illustrate the new parameter space in the intermediate-redshift regime probed by LEGA-C, we explore relationships between dynamical and stellar population properties. The star-forming galaxies typically have observed stellar velocity dispersions of ~150km/s and strong H{delta} absorption (H{delta}A~5{AA}), while passive galaxies have higher observed stellar velocity dispersions (~200km/s) and weak H{delta} absorption (H{delta}A~0{AA}). Strong [OIII]5007/H{beta} ratios tend to occur mostly for galaxies with weak H{delta}A or galaxies with higher observed velocity dispersion. Beyond these broad trends, we find a diversity of possible combinations of rest-frame colors, absorption-line strengths, and emission-line detections, illustrating the utility of spectroscopic measurements to more accurately understand galaxy evolution.

Cone search capability for table J/ApJS/239/27/legacdr2 (Large Early Galaxy Census (LEGA-C) spectroscopic survey DR2 catalog)

Associated data

Identifier
DOI http://doi.org/10.26093/cds/vizier.22390027
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJS/239/27
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/239/27
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/239/27
Related Identifier https://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/ApJS/239/27
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJS/239/27
Provenance
Creator Straatman C.M.S.; van der Wel A.; Bezanson R.; Pacifici C.; Gallazzi A.,Wu P.-F.; Noeske K.; Barisic I.; Bell E.F.; Brammer G.B.; Calhau J.,Chauke P.; Franx M.; van Houdt J.; Labbe I.; Maseda M.V.,Munoz-Mateos J.C.; Muzzin A.; van de Sande J.; Sobral D.; Spilker J.S.
Publisher CDS
Publication Year 2019
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics