The MASSIVE Survey. XII. Connecting Stellar Populations of Early-type Galaxies to Kinematics and Environment

Jenny E. Greene, Melanie Veale, Chung Pei Ma, Jens Thomas, Matthew E. Quenneville, John P. Blakeslee, Jonelle L. Walsh, Andrew Goulding, Jennifer Ito

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

We measure the stellar populations as a function of the radius for 90 early-type galaxies (ETGs) in the MASSIVE survey, a volume-limited integral-field spectroscopic (IFS) galaxy survey targeting all northern-sky ETGs with an absolute K-band magnitude of M K ,F< ,F-25.3 mag or a stellar mass of , within 108 Mpc. We are able to measure reliable stellar population parameters for individual galaxies out to 10-20 kpc (1-3 R e ) depending on the galaxy. Focusing on ∼R e (∼10 kpc), we find significant correlations between the abundance ratios, σ, and at a large radius, but we also find that the abundance ratios saturate in the highest-mass bin. We see a strong correlation between the kurtosis of the line-of-sight velocity distribution (h4) and the stellar population parameters beyond R e . Galaxies with higher radial anisotropy appear to be older, with metal-poorer stars and enhanced [α/Fe]. We suggest that the higher radial anisotropy may derive from more accretion of small satellites. Finally, we see some evidence for correlations between environmental metrics (measured locally and on >5 Mpc scales) and the stellar populations, as expected if satellites are quenched earlier in denser environments.

Original languageEnglish (US)
Article number66
JournalAstrophysical Journal
Volume874
Issue number1
DOIs
StatePublished - Mar 20 2019

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • galaxies: elliptical and lenticular, cD
  • galaxies: evolution
  • galaxies: formation
  • galaxies: kinematics and dynamics
  • galaxies: stellar content

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    Greene, J. E., Veale, M., Ma, C. P., Thomas, J., Quenneville, M. E., Blakeslee, J. P., Walsh, J. L., Goulding, A., & Ito, J. (2019). The MASSIVE Survey. XII. Connecting Stellar Populations of Early-type Galaxies to Kinematics and Environment. Astrophysical Journal, 874(1), [66]. https://doi.org/10.3847/1538-4357/ab01e3