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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table8.dat 37 345 Single stellar population models indices for
Mg2, Fe5270 and Fe5335
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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
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Bytes Format Units Label Explanations
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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
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 13-Dec-2005