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MILES SSP Models

Published online by Cambridge University Press:  13 April 2010

A. Vazdekis ,
P. Sánchez-Blázquez ,
J. Falcón-Barroso ,
A. J. Cenarro ,
M. A. Beasley ,
N. Cardiel ,
J. Gorgas  and
R. Peletier
A. Vazdekis*
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, E-38200 Tenerife, Spain Departamento de Astrofísica, Universidad de La Laguna, E-38205 La Laguna, Tenerife, Spain
P. Sánchez-Blázquez
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, E-38200 Tenerife, Spain Departamento de Astrofísica, Universidad de La Laguna, E-38205 La Laguna, Tenerife, Spain
J. Falcón-Barroso
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, E-38200 Tenerife, Spain Departamento de Astrofísica, Universidad de La Laguna, E-38205 La Laguna, Tenerife, Spain
A. J. Cenarro
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, E-38200 Tenerife, Spain Departamento de Astrofísica, Universidad de La Laguna, E-38205 La Laguna, Tenerife, Spain Centro de Estudios de Física del Cosmos de Aragón, C/ General Pizarro 1, E-44001, Teruel, Spain
M. A. Beasley
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, E-38200 Tenerife, Spain
N. Cardiel
Affiliation:
Dept. de Astrofísica, Fac. de Ciencias Físicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
J. Gorgas
Affiliation:
Dept. de Astrofísica, Fac. de Ciencias Físicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
R. Peletier
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, Postbus 800, 9700 AV, Groningen, Netherlands
*
†E-mail: vazdekis@iac.es
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Abstract

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We present SEDs for single-age, single-metallicity stellar populations (SSPs) covering the full optical spectral range at resolution (FWHM = 2.3Å). These SEDs can be regarded as our base models, as we combine scaled-solar isochrones with an empirical stellar spectral library (MILES), which follows the chemical evolution pattern of the solar neighbourhood. The models rely as much as possible on empirical ingredients as also employ extensive photometric libraries. Thanks to the unprecedented parameter coverage of the MILES library we synthesize SSP SEDs from intermediate- to very-old age regimes, and the metallicity from super-solar to [M/H] = −2.3, all for a suite of IMF shapes and slopes. We propose a new Line Index System (LIS), based on flux-calibrated spectra, to avoid the intrinsic uncertainties associated with the Lick/IDS system and provide more appropriate, uniform, spectral resolution.

Keywords

galaxies: abundancesgalaxies: star clusters galaxies: dwarf galaxies: elliptical and lenticularcD galaxies: evolution galaxies: stellar content

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