To refer to this page use:
|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 < -25.3 mag or a stellar mass of M-* greater than or similar to 10(11) M-circle dot, 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 similar to R-e (similar to 10 kpc), we find significant correlations between the abundance ratios, sigma, and M-* 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 [alpha/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.|
|Electronic Publication Date:||22-Mar-2019|
|Citation:||Greene, Jenny E, Veale, Melanie, Ma, Chung-Pei, Thomas, Jens, Quenneville, Matthew E, Blakeslee, John P, Walsh, Jonelle L, Goulding, Andrew, Ito, Jennifer. (2019). The MASSIVE Survey. XII. Connecting Stellar Populations of Early-type Galaxies to Kinematics and Environment. ASTROPHYSICAL JOURNAL, 874 (10.3847/1538-4357/ab01e3|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||ASTROPHYSICAL JOURNAL|
|Version:||Final published version. Article is made available in OAR by the publisher's permission or policy.|
Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.