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The Large Early Galaxy Astrophysics Census (LEGA-C) data release 2 : dynamical and stellar population properties of z ≲ 1 galaxies in the COSMOS field

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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 similar or equal to 20 angstrom(-1) of galaxies at 0.6 less than or similar to z less than or similar to 1.0, each observed for similar to 20 hr 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 similar to 150 km s(-1) and strong H delta absorption (H delta(A) similar to 5 angstrom), while passive galaxies have higher observed stellar velocity dispersions (similar to 200 km s(-1)) and weak H delta absorption (H delta(A) similar to 0 angstrom). Strong [O III] 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. By making the spectra and value-added catalogs publicly available we encourage the community to take advantage of this very substantial investment in telescope time provided by ESO.
Keywords
STAR-FORMATION HISTORIES, DIGITAL SKY SURVEY, QUIESCENT GALAXIES, FORMING GALAXIES, HOST GALAXIES, LIGHT RATIOS, LINE SPECTRA, DEEP, SURVEY, REDSHIFT, EVOLUTION, catalogs, galaxies: evolution, surveys, techniques: spectroscopic

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MLA
Straatman, Caroline et al. “The Large Early Galaxy Astrophysics Census (LEGA-C) Data Release 2 : Dynamical and Stellar Population Properties of z ≲ 1 Galaxies in the COSMOS Field.” ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 239.2 (2018): n. pag. Print.
APA
Straatman, C., van der Wel, A., Bezanson, R., Pacifici, C., Gallazzi, A., Wu, P.-F., Noeske, K., et al. (2018). The Large Early Galaxy Astrophysics Census (LEGA-C) data release 2 : dynamical and stellar population properties of z ≲ 1 galaxies in the COSMOS field. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 239(2).
Chicago author-date
Straatman, Caroline, Arjen van der Wel, Rachel Bezanson, Camilla Pacifici, Anna Gallazzi, Po-Feng Wu, Kai Noeske, et al. 2018. “The Large Early Galaxy Astrophysics Census (LEGA-C) Data Release 2 : Dynamical and Stellar Population Properties of z ≲ 1 Galaxies in the COSMOS Field.” Astrophysical Journal Supplement Series 239 (2).
Chicago author-date (all authors)
Straatman, Caroline, Arjen van der Wel, Rachel Bezanson, Camilla Pacifici, Anna Gallazzi, Po-Feng Wu, Kai Noeske, Ivana Barisic, Eric F Bell, Gabriel B Brammer, Joao Calhau, Priscilla Chauke, Marijn Franx, Josha van Houdt, Ivo Labbe, Michael V Maseda, Juan C Munoz-Mateos, Adam Muzzin, Jesse van de Sande, David Sobral, and Justin S Spilker. 2018. “The Large Early Galaxy Astrophysics Census (LEGA-C) Data Release 2 : Dynamical and Stellar Population Properties of z ≲ 1 Galaxies in the COSMOS Field.” Astrophysical Journal Supplement Series 239 (2).
Vancouver
1.
Straatman C, van der Wel A, Bezanson R, Pacifici C, Gallazzi A, Wu P-F, et al. The Large Early Galaxy Astrophysics Census (LEGA-C) data release 2 : dynamical and stellar population properties of z ≲ 1 galaxies in the COSMOS field. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES. 2018;239(2).
IEEE
[1]
C. Straatman et al., “The Large Early Galaxy Astrophysics Census (LEGA-C) data release 2 : dynamical and stellar population properties of z ≲ 1 galaxies in the COSMOS field,” ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, vol. 239, no. 2, 2018.
@article{8620721,
  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 similar or equal to 20 angstrom(-1) of galaxies at 0.6 less than or similar to z less than or similar to 1.0, each observed for similar to 20 hr 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 similar to 150 km s(-1) and strong H delta absorption (H delta(A) similar to 5 angstrom), while passive galaxies have higher observed stellar velocity dispersions (similar to 200 km s(-1)) and weak H delta absorption (H delta(A) similar to 0 angstrom). Strong [O III] 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. By making the spectra and value-added catalogs publicly available we encourage the community to take advantage of this very substantial investment in telescope time provided by ESO.},
  articleno    = {27},
  author       = {Straatman, Caroline and van der Wel, Arjen and Bezanson, Rachel and Pacifici, Camilla and Gallazzi, Anna and Wu, Po-Feng and Noeske, Kai and Barisic, Ivana and Bell, Eric F and Brammer, Gabriel B and Calhau, Joao and Chauke, Priscilla and Franx, Marijn and van Houdt, Josha and Labbe, Ivo and Maseda, Michael V and Munoz-Mateos, Juan C and Muzzin, Adam and van de Sande, Jesse and Sobral, David and Spilker, Justin S},
  issn         = {0067-0049},
  journal      = {ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES},
  keywords     = {STAR-FORMATION HISTORIES,DIGITAL SKY SURVEY,QUIESCENT GALAXIES,FORMING GALAXIES,HOST GALAXIES,LIGHT RATIOS,LINE SPECTRA,DEEP,SURVEY,REDSHIFT,EVOLUTION,catalogs,galaxies: evolution,surveys,techniques: spectroscopic},
  language     = {eng},
  number       = {2},
  pages        = {14},
  title        = {The Large Early Galaxy Astrophysics Census (LEGA-C) data release 2 : dynamical and stellar population properties of z ≲ 1 galaxies in the COSMOS field},
  url          = {http://dx.doi.org/10.3847/1538-4365/aae37a},
  volume       = {239},
  year         = {2018},
}

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