SIMBAD references

2014ApJ...797...55N - Astrophys. J., 797, 55 (2014/December-2)

Being WISE. I. Validating stellar population models and M{sstarf}/L ratios at 3.4 and 4.6 µm.

NORRIS M.A., MEIDT S., VAN DE VEN G., SCHINNERER E., GROVES B. and QUEREJETA M.

Abstract (from CDS):

Using data from the Wide-field Infrared Survey Explorer mission, we have measured near infra-red (NIR) photometry of a diverse sample of dust-free stellar systems (globular clusters, dwarf and giant early-type galaxies) which have metallicities that span the range -2.2 < [Fe/H] (dex) < 0.3. This dramatically increases the sample size and broadens the metallicity regime over which the 3.4 (W1) and 4.6 µm (W2) photometry of stellar populations have been examined. We find that the W1 - W2 colors of intermediate and old (>2 Gyr) stellar populations are insensitive to the age of the stellar population, but that the W1 - W2 colors become bluer with increasing metallicity, a trend not well reproduced by most stellar population synthesis (SPS) models. In common with previous studies, we attribute this behavior to the increasing strength of the CO absorption feature located in the 4.6 µm bandpass with metallicity. Having used our sample to validate the efficacy of some of the SPS models, we use these models to derive stellar mass-to-light ratios in the W1 and W2 bands. Utilizing observational data from the SAURON and ATLAS3D surveys, we demonstrate that these bands provide extremely simple, yet robust stellar mass tracers for dust free older stellar populations that are freed from many of the uncertainties common among optical estimators.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: fundamental parameters - globular clusters: general - infrared: galaxies

VizieR on-line data: <Available at CDS (J/ApJ/797/55): table1.dat>

Simbad objects: 210

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2014ApJ...797...55N and select 'bookmark this link' or equivalent in the popup menu


2019.12.15-22:21:57

© Université de Strasbourg/CNRS

    • Contact