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

abstract

  • 2019. The American Astronomical Society. All rights reserved.. 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, , 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 [/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.

published proceedings

  • ASTROPHYSICAL JOURNAL

altmetric score

  • 10.58

author list (cited authors)

  • Greene, J. E., Veale, M., Ma, C., Thomas, J., Quenneville, M. E., Blakeslee, J. P., ... Ito, J.

citation count

  • 31

complete list of authors

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

publication date

  • January 2019