J/PASP/113/1365 Super-metal-rich stars (Buzzoni+, 2001)
Lick spectral indices for super-metal-rich stars.
Buzzoni A., Chavez M., Malagnini M.L., Morossi C.
<Publ. Astron. Soc. Pac. 113, 1365 (2001)>
=2001PASP..113.1365B 2001PASP..113.1365B
ADC_Keywords: Abundances, peculiar ; Abundances, [Fe/H]
Abstract:
We present Lick spectral indices for a complete sample of 139
candidate super-metal-rich stars of different luminosity classes (MK
type from I to V). For 91 of these stars we were able to identify, in
an accompanying paper, the fundamental atmosphere parameters. This
confirms that at least 2/3 of the sample consists of stars with [Fe/H]
in excess of +0.1 dex. Optical indices for both observations and
fiducial synthetic spectra have been calibrated to the Lick system
according to Worthey et al. (1994, Cat. J/ApJS/94/687) and include
the FeI indices of Fe5015, Fe5270, and Fe5335 and the MgI and MgH
indices of Mg2 and Mgb at 5180Å. The internal accuracy of the
observations is found to be σ(Fe5015)=10.32Å,
σ(Fe5270)=10.19Å, σ(Fe5335)=10.22Å,
σ(Mg2)=10.004mag, and σ(Mgb)=10.19Å. This is about
a factor of 2 better than the corresponding theoretical indices from
the synthetic spectra, the latter being a consequence of the intrinsic
limitations in the input physics, as discussed by Chavez et al. (1997,
Cat. J/A+AS/126/267).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 72 139 Observational database and standard Lick indices
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See also:
J/A+AS/126/267 : Atlas of Synthetic Spectra (Chavez+ 1997)
J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number
8- 20 A13 --- SpType MK spectral type
22 I1 --- Nsp Number of collected spectra
24- 29 F6.4 mag s(flux) ? Mean flux uncertainty as from the standard
deviation of the relative flux for
repeated observations (1)
31- 36 F6.3 0.1nm Fe50 Standard index of Fe5015
38- 42 F5.3 mag Mg2 Standard index of Mg2
44- 49 F6.3 0.1nm Mgb Standard index of Mgb
51- 55 F5.3 0.1nm Fe52 Standard index of Fe5270
57- 61 F5.3 0.1nm Fe53 Standard index of Fe5335
63- 67 F5.2 Sun [Fe/H] ? Metallicity from Paper I,
Malagnini et al. (2000PASP..112.1455M 2000PASP..112.1455M)
69- 72 A4 --- Rem [WB, ] Remarks (2)
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Note (1): For single observations, a mean s(flux)=0.02 will be assumed
in this work.
Note (2): Index calibrator in common with
W: Worthey et al. (1994, Cat. J/ApJS/94/687) or
B: Buzzoni et al. 1992AJ....103.1814B 1992AJ....103.1814B, 1994AJ....107..513B 1994AJ....107..513B
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 18-Jan-2002