LEGA-C DR2: galaxies in the COSMOS field Virtual Observatory Resource

Authors
  1. Straatman C.M.S.
  2. van der Wel A.
  3. Bezanson R.
  4. Pacifici C.
  5. Gallazzi A.,Wu P.-F.
  6. Noeske K.
  7. Barisic I.
  8. Bell E.F.
  9. Brammer G.B.
  10. Calhau J.,Chauke P.
  11. Franx M.
  12. van Houdt J.
  13. Labbe I.
  14. Maseda M.V.,Munoz-Mateos J.C.
  15. Muzzin A.
  16. van de Sande J.
  17. Sobral D.
  18. Spilker J.S.
  19. Published by
    CDS
Abstract

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.

Keywords
  1. galaxies
  2. spectroscopy
  3. galaxy-kinematics
  4. redshifted
  5. line-intensities
  6. surveys
  7. visible-astronomy
Bibliographic source Bibcode
2018ApJS..239...27S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/239/27
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJS/239/27
Document Object Identifer DOI
doi:10.26093/cds/vizier.22390027

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/239/27
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/239/27
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/239/27
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http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/239/27/legacdr2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/239/27/legacdr2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/239/27/legacdr2?
Web browser access HTML
https://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/ApJS/239/27

History

2019-03-11T15:41:52Z
Resource record created
2019-03-11T15:41:52Z
Created
2021-02-23T07:53:44Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr