Stellar population study in early-type galaxies: an approach from the K band

被引：0
作者：
Marmol-Queralto, Esther [1 ]
Cardiel, Nicolas [1 ]
Sanchez-Blazquez, P. [2 ]
Trager, S. C. [3 ]
Peletier, R. F. [3 ]
Kuntschner, H. [4 ]
Silva, D. R. [5 ]
Cenarro, A. J. [2 ]
Vazdekis, A. [2 ]
Gorgas, J. [1 ]
机构：
[1] Univ Complutense Madrid, Dept Astrofis, Ciudad Univ, E-28040 Madrid, Spain
[2] Inst Astrofis Canarias, E-38205 Tenerife, Spain
[3] Univ Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands
[4] Space Telescope European Coordinating Facil, D-85748 Garching, Germany
[5] Natl Opt Astron Observ, Tucson, AZ 85719 USA
来源：
STELLAR POPULATIONS: PLANNING FOR THE NEXT DECADE | 2010年 / 262期
关键词：
galaxies: clusters: general; galaxies: elliptical and lenticular; cD; galaxies: evolution; galaxies: formation; galaxies: stellar content; LOW-DENSITY ENVIRONMENTS; ELLIPTIC GALAXIES; LINE-STRENGTHS; FORNAX CLUSTER; INDEXES; CO;
D O I：
10.1017/S1743921310002577
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A full understanding of the physical properties of integrated stellar systems demands a multiwavelength approach since each spectral window shows us the contribution of different types of stars. However, most of the observational effort in stellar population studies has been focused on the optical range. Now, the new generation of instruments allow us to explore the K band, where RGB and AGB stars dominate the light of the integrated spectra. Here we present a K-band spectroscopic analysis of early-type galaxies in different environments. Our sample comprises 1.2 field early-type galaxies observed with ISAAC at VLT with medium resolution, and they are compared with 11 Fornax cluster galaxies previously reported by Silva et al. (2008). The clear differences found in the infrared D-CO and NaI indices between held and Fornax galaxies are discussed, trying to solve the puzzle formed by the near-infrared and optical measurements.
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页码：85 / +
页数：2
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