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README
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README
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------------------------------------------------------------------------
------------------------------------------------------------------------
M11-ELODIE TEMPLATE LIBRARY
------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
From README_M11.txt:
------------------------------------------------------------------------
THIS README DESCRIBES THE FILES CONTAINING THE STELLAR POPULATION MODELS
OF MARASTON & STROMBACK (2011, MNRAS). MODELS ARE AVAILABLE AT
WWW.MARASTON.EU/M11/.
These models have the same stellar energetics and atmospheric parameters
as the standard Maraston (2005, M05) models. The difference is in the
individual stellar spectra that are assigned to the various synthetic
stars according to their effective temperatures and gravities (Teff and
log). These spectra can be either empirical or theoretical, and in some
cases a mixture of them.
In particular, the empirically-based models have been extended in
wavelength coverage into the UV, using the high-resolution models
published in Maraston et al. (2009, 493, 425), which are based on the
theoretical spectral library UVBLUE (Rodrigues-Merino et al. 2005). This
extension was made at various metallicities in case of the MILES-based
models, and at solar metallicity for STELIB and ELODIE. The UV-extended
models will be indicated using the addition 'UVextended' to the file
name (see below).
We also provide a version of the Pickles-based models, which extend to
the UV, using the models with the theoretical UV. In this case since is
not an extension we call then 'UVtheoretical'.
In general, models should be chosen according to the spectral resolution
that is needed by observations, though differences induced by the use of
different spectral libraries exist. See the paper for a description or
contact the authors.
GENERAL NAMING:
------------------------------------------------------------------------
ssp_M11'_'library'_'any eventual extension'.'imf''zxxx'.'HB morphology':
------------------------------------------------------------------------
* 'ssp_M11': Simple Stellar Populations by Maraston & Stromback 2011
* 'library': reference to the adopted stellar library, e.g. Pickles,
MILES, STELIB, ELODIE, MARCS, see below for a detailed
description.
* 'any eventual extension': it refers to whether the models have been
extended in wavelength coverage by merging
with other models or have been revised
with respect to the original library.
Cases are:
'UVextended': models extended into the UV by merging with
theoretically-based SSPs
'UVtheoretical': only for Pickles-based models. The Pickles-based
UV as been substituted with the theoretical UV
'nearIRextended':
'revisednearIRslope': only for MILES-based models of solar
metallicity. The slope of the models longward
6000 AA has been slightly revised as
described in the Appendix of the paper.
* 'imf': Initial Mass Funcion,IMF, namely:
'.ss' ==> Salpeter IMF
'.kr' ==> Kroupa IMF
'.cha' ==> Chabrier IMF
(Other IMFs could be obtained contacting the authors)
* 'zxxx': chemical composition, as it follows (notation identical to
M05)
z10m4=0.0001
z0001=0.001
z001=0.01
z002=0.02 (solar metallicity)
z004=0.04
* 'Horizontal Branch morphology': following the notation of M05 this
can be rhb=intermediate-red and
bhb=intermediate-blue. Relevant to
sub-solar metallicities.
------------------------------------------------------------------------
ELODIE-BASED MODELS: These models are based on the stellar library
ELODIE by Prugniel et al. (2007).
* Caveat regarding the flux calibration/de-reddening of
the hottest stars, which will affect the youngest ages, <
100 Myr at solar metallicity.
* A few cool, high-resolution theoretical stars
(Gustafsson et al. 2008) have been added for completeness.
* Fairly poor sampling of stellar parameter space at the
lowest metallicity affects the reliability of these
models.
Resolution: 0.55 A (fwhm)
0.2 AA sampling
ssp_M11_ELODIE.'imf'z10m4.rhb: 10 ages, 6-15 Gyr
3900.0 - 6800.0 AA
14501 flux points
ssp_M11_ELODIE.'imf'z10m4.bhb: 6 ages, 6-11 Gyr
3900.0 - 6800.0 AA
14501 flux points
ssp_M11_ELODIE.'imf'z001: 34 ages, 55 Myr to 15 Gyr
3900.0 - 6800.0 AA
14501 flux points
ssp_M11_ELODIE.'imf'z002: 57 ages, 3 Myr to 15 Gyr
3900.0 - 6800.0 AA
14501 flux points
ssp_M11_ELODIE_UVextended.'imf'z002: 54 ages, 3 Myr to 15 Gyr
1000.2 - 6800.0 AA
29000 flux points
UV extended version, models merged
around 3950 AA.
ssp_M11_ELODIE.'imf'z004: 25 ages, 100 Myr to 15 Gyr
3900.0 - 6800.0 AA
14501 flux points
------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
DAP NOTES:
This library only contains the following tempaltes:
ssp_M11_ELODIE.ss.z001
ssp_M11_ELODIE.ss.z002
ssp_M11_ELODIE.ss.z004
------------------------------------------------------------------------
------------------------------------------------------------------------
K.B. Westfall, 24 Mar 2015
------------------------------------------------------------------------