SIMBAD references

2019ApJ...874...66G - Astrophys. J., 874, 66-66 (2019/March-3)

The MASSIVE survey. XII. Connecting stellar populations of early-type galaxies to kinematics and environment.

GREENE J.E., VEALE M., MA C.-P., THOMAS J., QUENNEVILLE M.E., BLAKESLEE J.P., WALSH J.L., GOULDING A. and ITO J.

Abstract (from CDS):

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 MK < -25.3 mag or a stellar mass of M*≳4×1011M, within 108 Mpc. We are able to measure reliable stellar population parameters for individual galaxies out to 10-20 kpc (1-3 Re) depending on the galaxy. Focusing on ∼Re (∼10 kpc), we find significant correlations between the abundance ratios, σ, 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 Re. 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.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: formation - galaxies: kinematics and dynamics - galaxies: stellar content

Status in Simbad:  waiting for electronic table

Simbad objects: 18

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2019.12.07-05:29:07

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