J/MNRAS/442/220 Lick indices for FGK stars (Franchini+, 2014)
The FEROS-Lick/SDSS observational data base of spectral indices of FGK stars for
stellar population studies.
Franchini M., Morossi C., Marcantonio P.D., Malagnini M.L., Chavez M.
<Mon. Not. R. Astron. Soc., 442, 220-228 (2014)>
=2014MNRAS.442..220F 2014MNRAS.442..220F
ADC_Keywords: Stars, late-type ; Spectroscopy ; Abundances
Keywords: astronomical data bases: miscellaneous -
stars: fundamental parameters - stars: late-type
Abstract:
We present FEROS-Lick/SDSS, an empirical data base of Lick/SDSS
spectral indices of FGK stars to be used in population synthesis
projects for discriminating different stellar populations within the
integrated light of galaxies and globular clusters. From about 2500
FEROS stellar spectra obtained from the European Southern Observatory
Science Archive Facility, we computed line-strength indices for 1085
non-supergiant stars with atmospheric parameter estimates from the
AMBRE project. Two samples of 312 dwarfs and of 83 subgiants with
solar chemical composition and no significant α-element
abundance enhancement are used to compare their observational indices
with the predictions of the Lick/SDSS library of synthetic indices. In
general, the synthetic library reproduces very well the behaviour of
observational indices as a function of temperature, but in the case of
low-temperature (Teff≲5000K) dwarfs; low-temperature
subgiants are not numerous enough to derive any conclusion. Several
possible causes of the disagreement are discussed and promising
theoretical improvements are presented.
Description:
The stars observed by FEROS and studied by the AMBRE project (Worley
et al., 2012A&A...542A..48W 2012A&A...542A..48W) constitute an ideal working data set for
our purposes since they include a large number of non-supergiant FGK
stars with individual estimates of Teff, log g, [M/H], and
α-to-iron ratio ([alpha/Fe]).
We searched the European Southern Observatory (ESO) Science Archive
Facility and retrieved, through the FEROS/HARPS pipeline processed
data Query Form, all the public available spectra of FGK stars with
AMBRE atmospheric parameter values in the following ranges:
3800<Teff<7500K, logg>3.5, and global metallicity [M/H]>-3.0.
A list of 1085 stars, corresponding to 2511 available spectra, was
obtained. Since AMBRE provides individual estimates of stellar
parameters derived from each spectrum, we computed for 202 stars with
more than one observed spectrum average atmospheric parameter values.
In any case, the dispersion of values for the same object resulted to
be less than the external errors associated with AMBRE results.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 309 1085 Table of observational Lick/SDSS indices of
1085 FGK FEROS stars
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Name Star name
25- 26 I2 --- Nsp [1/97] Number of spectra (1)
28- 31 I4 K Teff [3830/7420] Effective temperature
33- 35 I3 K e_Teff [0/110] rms uncertainty on Teff
37- 40 F4.2 [cm/s2] logg [3.5/5] Surface gravity
42- 45 F4.2 [cm/s2] e_logg [0/0.18] rms uncertainty on logg
47- 51 F5.2 [Sun] [M/H] [-2.5/0.8] Metallicity
53- 56 F4.2 [Sun] e_[M/H] [0/0.1] rms uncertainty on [M/H]
58- 62 F5.2 [Sun] [a/Fe] [-0.4/0.5]?=- [alpha/Fe] abundance
64- 67 F4.2 [Sun] e_[a/Fe] [0/0.1]?=- rms uncertainty on [alpha/Fe]
69- 74 F6.3 0.1nm CaHK ?=- Lick Ca H&K index
76- 80 F5.3 0.1nm e_CaHK ?=- rms uncertainty on CaHK
82- 86 F5.3 mag CN1 ?=- Lick CN1 index
88- 92 F5.3 mag e_CN1 ?=- rms uncertainty on CN1
94- 98 F5.3 mag CN2 ?=- Lick CN2 index
100-104 F5.3 mag e_CN2 ?=- rms uncertainty on CN2
106-110 F5.3 0.1nm Ca4227 ?=- Lick Ca4227 index
112-116 F5.3 0.1nm e_Ca4227 ?=- rms uncertainty on Ca4227
118-123 F6.3 0.1nm G4300 ?=- Lick G4300 index
125-129 F5.3 0.1nm e_G4300 ?=- rms uncertainty on G4300
131-136 F6.3 0.1nm Fe4383 ?=- Lick Fe4383 index
138-142 F5.3 0.1nm e_Fe4383 ?=- rms uncertainty on Fe4383
144-149 F6.3 0.1nm Ca4455 ?=- Lick Ca4455 index
151-155 F5.3 0.1nm e_Ca4455 ?=- rms uncertainty on Ca4455
157-162 F6.3 0.1nm Fe4531 ?=- Lick Fe4531 index
164-168 F5.3 0.1nm e_Fe4531 ?=- rms uncertainty on Fe4531
170-175 F6.3 0.1nm Hbeta ?=- Lick Hβ index
177-181 F5.3 0.1nm e_Hbeta ?=- rms uncertainty on Hbeta
183-188 F6.3 0.1nm Fe5015 ?=- Lick Fe5015 index
190-194 F5.3 0.1nm e_Fe5015 ?=- rms uncertainty on Fe5015 *
196-200 F5.3 mag Mg1 ?=- Lick Mg1 index
202-206 F5.3 mag e_Mg1 ?=- rms uncertainty on Mg1
208-212 F5.3 mag Mg2 ?=- Lick Mg2 index
214-218 F5.3 mag e_Mg2 ?=- rms uncertainty on Mg2
220-225 F6.3 0.1nm Mgb ?=- Lick Mgb index
227-231 F5.3 0.1nm e_Mgb ?=- rms uncertainty on Mgb
233-238 F6.3 0.1nm Fe5270 ?=- Lick Fe5270 index
240-244 F5.3 0.1nm e_Fe5270 ?=- rms uncertainty on Fe5270
246-251 F6.3 0.1nm Fe5335 ?=- Lick Fe5335 index
253-257 F5.3 0.1nm e_Fe5335 ?=- rms uncertainty on Fe5335
259-264 F6.3 0.1nm Fe5406 ?=- Lick Fe5406 index
266-270 F5.3 0.1nm e_Fe5406 ?=- rms uncertainty on Fe5406
272-277 F6.3 0.1nm Fe5709 ?=- Lick Fe5709 index
279-283 F5.3 0.1nm e_Fe5709 ?=- rms uncertainty on Fe5709
285-290 F6.3 0.1nm Fe5782 ?=- Lick Fe5782 index
292-296 F5.3 0.1nm e_Fe5782 ?=- rms uncertainty on Fe5782
298-303 F6.3 0.1nm NaD ?=- Lick NaD index
305-309 F5.3 0.1nm e_NaD ?=- rms uncertainty on NaD
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Note (1): The atmospheric parameters Teff, log g, [M/H], and [a/Fe], and
index values are averaged values in the case of more than one spectrum
(see text).
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Feb-2015