Empirical calibration of the near-infrared CaII triplet - I. The stellar library and index definition

被引：293

作者：

Cenarro, AJ ^{[1
]}

Cardiel, N

Gorgas, J

Peletier, RF

Vazdekis, A

Prada, F

机构：

[1] Univ Complutense Madrid, Fac Ciencias Fis, Dept Astrofis, E-28040 Madrid, Spain

[2] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[3] Univ Durham, Dept Phys, Durham DH1 3LE, England

[4] Observ Calar Alto, Almeria, Spain

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2001年 / 326卷 / 03期

关键词：

stars : abundances; stars : fundamental parameters; globular clusters : general; galaxies : stellar content;

D O I：

10.1046/j.1365-8711.2001.04688.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new stellar library at the near-IR spectral region developed for the empirical calibration of the Ca II triplet and stellar population synthesis modelling is presented. The library covers the range lambda lambda 8348-9020 at 1.5-Angstrom (FWHM) spectral resolution, and consists of 706 stars spanning a wide range in atmospheric parameters. We have defined a new set of near-IR indices, CaT*, CaT and PaT, which mostly overcome the limitations of previous definitions, the former being specially suited for the measurement of the Ca II triplet strength corrected for the contamination from Paschen lines. We also present a comparative study of the new and the previous Ca indices, as well as the corresponding transformations between the different systems. A thorough analysis of the sources of index errors and the procedure to calculate them is given. Finally, index and error measurements for the whole stellar library are provided together with the final spectra.

引用

页码：959 / 980

页数：22

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