Probing Evolutionary Population Synthesis Models in the Near Infrared with Early Type Galaxies

DOI: 
10.1093/mnras/sty515
Publication date: 
01/02/2018
Main author: 
Dahmer-Hahn, Luis Gabriel
IAA authors: 
Kehrig, Carolina
Authors: 
Dahmer-Hahn, Luis Gabriel;Riffel, Rogério;Rodríguez-Ardila, Alberto;Martins, Lucimara P.;Kehrig, Carolina;Heckman, Timothy M.;Pastoriza, Miriani G.;Dametto, Natacha Z.
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Pages: 
4459-4480
Abstract: 
We performed a near-infrared (NIR, ̃1.0μm-2.4μm) stellar population study in a sample of early type galaxies. The synthesis was performed using five different evolutionary population synthesis libraries of models. Our main results can be summarized as follows: low spectral resolution libraries are not able to produce reliable results when applied to the NIR alone, with each library finding a different dominant population. The two newest higher resolution models, on the other hand, perform considerably better, finding consistent results to each other and to literature values. We also found that optical results are consistent with each other even for lower resolution models. We also compared optical and NIR results, and found out that lower resolution models tend to disagree in the optical and in the NIR, with higher fraction of young populations in the NIR and dust extinction ̃1 magnitude higher than optical values. For higher resolution models, optical and NIR results tend do aggree much better, suggesting that a higher spectral resolution is fundamental to improve the quality of the results.
Database: 
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2018MNRAS.476.4459D/abstract
ADS Bibcode: 
2018MNRAS.476.4459D
Keywords: 
galaxies: stellar content;stars: AGB and post-AGB;infrared: galaxies;Astrophysics - Astrophysics of Galaxies