J/MNRAS/404/1639 MILES base models & new line index system (Vazdekis+, 2010)
Evolutionary stellar population synthesis with MILES.
I. The base models and a new line index system.
Vazdekis A., Sanchez-Blazquez P., Falcon-Barroso J., Cenarro A.J.,
Beasley M.A., Cardiel N., Gorgas J., Peletier R.F.
<Mon. Not. R. Astron. Soc., 404, 1639-1671 (2010)>
=2010MNRAS.404.1639V 2010MNRAS.404.1639V
ADC_Keywords: Models ; Spectroscopy ; Energy distributions ;
Clusters, globular ; Galaxies, spectra
Keywords: globular clusters: general - galaxies: abundances -
galaxies: elliptical and lenticular, cD - galaxies: stellar content
Abstract:
We present synthetic spectral energy distributions (SEDs) for
single-age, single-metallicity stellar populations (SSPs) covering the
full optical spectral range at moderately high resolution [full width
at half-maximum (FWHM)=2.3Å]. These SEDs constitute our base
models, as they combine scaled-solar isochrones with an empirical
stellar spectral library [Medium resolution INT Library of Empirical
Spectra (MILES)], which follows the chemical evolution pattern of the
solar neighbourhood. The models rely as much as possible on empirical
ingredients, not just on the stellar spectra, but also on extensive
photometric libraries, which are used to determine the transformations
from the theoretical parameters of the isochrones to observational
quantities. The unprecedented stellar parameter coverage of the MILES
stellar library allowed us to safely extend our optical SSP SED
predictions from intermediate- to very-old-age regimes and the
metallicity coverage of the SSPs from super-solar to [M/H]=-2.3.
SSPs with such low metallicities are particularly useful for globular
cluster studies. We have computed SSP SEDs for a suite of initial mass
function shapes and slopes. We provide a quantitative analysis of the
dependence of the synthesized SSP SEDs on the (in)complete coverage of
the stellar parameter space in the input library that not only shows
that our models are of higher quality than those of other works, but
also in which range of SSP parameters our models are reliable.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 377 489 Lick indices measured in the Line Index System (LIS)
for glubulars and galaxies from selected references
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See also:
J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)
J/MNRAS/374/664 : Stellar atmospheric param. in MILES library (Cenarro+, 2007)
Byte-by-byte Description of file:table2.dat
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Bytes Format Units Label Explanations
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1 A1 --- Ref [A-J] Reference code (1)
3- 14 A12 --- Name Globular cluster or galaxy name
16- 22 F7.4 0.1nm HdA ?=- HdA line-strength index
24- 30 F7.4 0.1nm HdF ?=- HdF line-strength index
32- 38 F7.4 mag CN1 ?=- CN1 line-strength index
40- 46 F7.4 mag CN2 ?=- CN2 line-strength index
48- 53 F6.4 0.1nm Ca4227 ?=- Ca4227 line-strength index
55- 60 F6.4 0.1nm G4300 ?=- G4300 line-strength index
62- 68 F7.4 0.1nm HgA ?=- HgA line-strength index
70- 76 F7.4 0.1nm HgF ?=- HgF line-strength index
78- 83 F6.4 0.1nm Fe4383 ?=- Fe4383 line-strength index
85- 90 F6.4 0.1nm Ca4455 ?=- Ca4455 line-strength index
92- 97 F6.4 0.1nm Fe4531 ?=- Fe4531 line-strength index
99-105 F7.4 0.1nm C4668 ?=- C4668 line-strength index
107-112 F6.4 0.1nm Hb ?=- Hb line-strength index
114-119 F6.4 0.1nm Fe5015 ?=- Fe5015 line-strength index
121-127 F7.4 mag Mg1 ?=- Mg1 line-strength index
129-134 F6.4 mag Mg2 ?=- Mg2 line-strength index
136-141 F6.4 0.1nm Mgb ?=- Mgb line-strength index
143-148 F6.4 0.1nm Fe5270 ?=- Fe5270 line-strength index
150-155 F6.4 0.1nm Fe5335 ?=- Fe5335 line-strength index
157-162 F6.4 0.1nm Fe5406 ?=- Fe5406 line-strength index
164-170 F7.4 0.1nm Fe5709 ?=- Fe5709 line-strength index
172-178 F7.4 0.1nm Fe5782 ?=- Fe5782 line-strength index
180-186 F7.4 0.1nm NaD ?=- NaD line-strength index
188-194 F7.4 mag TiO1 ?=- TiO1 line-strength index
196-202 F7.4 mag TiO2 ?=- TiO2 line-strength index
204-209 F6.4 0.1nm e_HdA ?=- Error on HdA
211-216 F6.4 0.1nm e_HdF ?=- Error on HdF
218-223 F6.4 mag e_CN1 ?=- Error on CN1
225-230 F6.4 mag e_CN2 ?=- Error on CN2
232-237 F6.4 0.1nm e_Ca4227 ?=- Error on Ca4227
239-244 F6.4 0.1nm e_G4300 ?=- Error on G4300
246-251 F6.4 0.1nm e_HgA ?=- Error on HgA
253-258 F6.4 0.1nm e_HgF ?=- Error on HgF
260-265 F6.4 0.1nm e_Fe4383 ?=- Error on Fe4383
267-272 F6.4 0.1nm e_Ca4455 ?=- Error on Ca4455
274-279 F6.4 0.1nm e_Fe4531 ?=- Error on Fe4531
281-286 F6.4 0.1nm e_C4668 ?=- Error on C4668
288-293 F6.4 0.1nm e_Hb ?=- Error on Hb
295-300 F6.4 0.1nm e_Fe5015 ?=- Error on Fe5015
302-307 F6.4 mag e_Mg1 ?=- Error on Mg1
309-314 F6.4 mag e_Mg2 ?=- Error on Mg2
316-321 F6.4 0.1nm e_Mgb ?=- Error on Mgb
323-328 F6.4 0.1nm e_Fe5270 ?=- Error on Fe5270
330-335 F6.4 0.1nm e_Fe5335 ?=- Error on Fe5335
337-342 F6.4 0.1nm e_Fe5406 ?=- Error on Fe5406
344-349 F6.4 0.1nm e_Fe5709 ?=- Error on Fe5709
351-356 F6.4 0.1nm e_Fe5782 ?=- Error on Fe5782
358-363 F6.4 0.1nm e_NaD ?=- Error on NaD
365-370 F6.4 mag e_TiO1 ?=- Error on TiO1
372-377 F6.4 mag e_TiO2 ?=- Error on TiO2
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Note (1): References as follows:
A = Puzia et al. (2002A&A...395...45P 2002A&A...395...45P) [LIS-5.0A]
B = Schiavon et al. (2005ApJS..160..163S 2005ApJS..160..163S) [LIS-5.0A]
C = Trager et al. (2000AJ....119.1645T 2000AJ....119.1645T) [LIS-8.4A]
D = Trager et al. (2000AJ....119.1645T 2000AJ....119.1645T) [LIS-14.0A]
E = Sanchez-Blazquez et al. (2006MNRAS.371..703S 2006MNRAS.371..703S) [LIS-8.4A]
F = Sanchez-Blazquez et al. (2006MNRAS.371..703S 2006MNRAS.371..703S) [LIS-14.0A]
G = Yamada et al. (2006ApJ...637..200Y 2006ApJ...637..200Y) [LIS-8.4A]
H = Yamada et al. (2006ApJ...637..200Y 2006ApJ...637..200Y) [LIS-14.0A]
I = Kuntschner et al. (2006MNRAS.369..497K 2006MNRAS.369..497K) [LIS-8.4A]
J = Kuntschner et al. (2006MNRAS.369..497K 2006MNRAS.369..497K) [LIS-14.0A]
[LIS refers to the new line index system, i.e.,
LIS-5.0A for globular cluster,
LIS-8.4A for dwarf and intermediate-mass galaxies,
LIS-14.0A for massive galaxies.
See paper for definitions, tables A1-A3]
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Nov-2010