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J/AJ/130/55          Modelled Lick indices for galaxies          (Mendes+, 2005)

Ages, metallicities, and α-element enhancement for galaxies in Hickson compact groups. Mendes De Oliveira C., Coelho P., Gonzalez J.J., Barbuy B. <Astron. J., 130, 55-64 (2005)> =2005AJ....130...55M
ADC_Keywords: Models ; Abundances Keywords: galaxies: elliptical and lenticular, cD - galaxies: formation - galaxies: interactions - galaxies: kinematics and dynamics - galaxies: stellar content Abstract: Central velocity dispersions and eight line-strength Lick indices have been determined from 1.3Å resolution long-slit spectra of 16 elliptical galaxies in Hickson compact groups. These data were used to determine galaxy properties (ages, metallicities, and α-element enhancements) and allowed a comparison with the parameters determined for a sample of galaxies in lower density environments studied by Gonzalez (1993, Ph.D. thesis, Univ. California, Santa Cruz). The stellar population parameters were derived by comparison to single stellar population models of Thomas et al. (Cat. J/ApJ/621/673) and to a new set of simple stellar population models for the indices Mg2, Fe5270, and Fe5335 based on synthetic spectra. These models, based on an updated version of the fitting functions presented in Barbuy et al. (Cat. J/A+A/404/661), are fully described here. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table8.dat 37 345 Single stellar population models indices for Mg2, Fe5270 and Fe5335
See also: J/A+A/404/661 : Fe5270, Fe5335, Mgb and Mg2 synthetic indices (Barbuy+ 2003) J/ApJ/621/673 : Line indices for 124 early-type galaxies (Thomas+, 2005) Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1- 2 I2 Gyr Age [4/16] Model age 4- 8 F5.3 --- Z [0.008/0.040] Model metallicity 10- 12 F3.1 [Sun] [a/Fe] Log of the model α/Fe number abundance 14- 18 F5.2 [Sun] [Fe/H] Log of the model Fe/H number abundance 20- 24 F5.3 --- Mg2 Model Mg2 index 26- 30 F5.3 --- Fe52 Model Fe5270 index 32- 36 F5.3 --- Fe53 Model Fe5335 index
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 13-Dec-2005
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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