Revisiting the role of the Thermally-Pulsating Asymptotic Giant Branch phase in high-redshift galaxies

Abstract

We study the debated contribution from thermally pulsing asymptotic giant branch (TP-AGB) stars in evolutionary population synthesis models. We investigate the Spectral Energy Distributions (SEDs) of a sample of 51 spectroscopically confirmed, high-z ($1.3<z_{\mathrm{spec}}<2.7$), galaxies using three evolutionary population synthesis models with strong, mild and light TP-AGB. Our sample is the largest of spectroscopically confirmed galaxies on which such models are tested so far. Galaxies were selected as passive, but we model them using a variety of star formation histories in order not to be dependent on this pre-selection. We find that the observed SEDs are best fitted with a significant contribution of TP-AGB stars or with substantial dust attenuation. Without including reddening, TP-AGB-strong models perform better and deliver solutions consistent within $1\sigma$ from the best-fit ones in the vast majority of cases. Including reddening, all models perform similarly. Using independent constraints from observations in the mid- and far-IR, we show that low/negligible dust attenuation, i.e. $E(B-V)\lesssim 0.05$ , should be preferred for the SEDs of passively-selected galaxies. Given that TP-AGB-light models give systematically older ages for passive galaxies, we suggest number counts of passive galaxies at higher redshifts as a further test to discriminate among stellar population models.

48 pages, 17 figures, 10 Tables. Accepted for publication in MNRAS

References in corpus (18)

• The Cosmic Evolution Survey (COSMOS) -- Overview
• EAZY: A Fast, Public Photometric Redshift Code
• COSMOS Photometric Redshifts with 30-bands for 2-deg2
• zCOSMOS: A Large VLT/VIMOS redshift survey covering 0 < z < 3 in the COSMOS field
• Detection of quiescent galaxies in a bicolor sequence from z=0-2
• UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
• A primer on hierarchical galaxy formation: the semi-analytical approach
• Evidence for TP-AGB stars in high redshift galaxies, and their effect on deriving stellar population parameters
• What do we learn from IRAC observations of galaxies at 2 < z < 3.5?
• The Cosmic Evolution Survey (COSMOS): Subaru Observations of the HST COSMOS Field
• Multiple stellar populations in Magellanic Clouds clusters. I. An ordinary feature for intermediate age globulars in the LMC?
• The stellar velocity dispersion of a compact massive galaxy at z=1.80 using X-Shooter: confirmation of the evolution in the mass-size and mass-dispersion relations
• A direct constraint on the gas content of a massive, passively evolving elliptical galaxy at z = 1.43
• A Comparison of Optical and Near-Infrared Colours of Magellanic Cloud Star Clusters with Predictions of Simple Stellar Population Models
• The Stellar Populations of Starburst Galaxies Through near infrared spectroscopy
• The Stellar Spectral Features of Nearby Galaxies in the Near-Infrared: Tracers of Thermally-Pulsing Asymptotic Giant Branch Stars?
• Passive galaxies as tracers of cluster environments at z~2
• AGB populations in post-starburst galaxies

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