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J/PASP/113/1365 Super-metal-rich stars Lick spectral indices (Buzzoni+, 2001)
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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 (SIMBAD/NED BibCode)
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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 Fe I indices of Fe5015, Fe5270, and Fe5335 and the Mg I and MgH
indices of Mg_2_ and Mg_b_ at 5180{AA}. The internal accuracy of the
observations is found to be {sigma}(Fe5015)=10.32{AA},
{sigma}(Fe5270)=10.19{AA}, {sigma}(Fe5335)=10.22{AA},
{sigma}(Mg_2_)=10.004mag, and {sigma}(Mg_b_)=10.19{AA}. 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 --- Nspectra 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 Mg_2_
44- 49 F6.3 0.1nm Mgb Standard index of Mg_b_
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)
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, 1994AJ....107..513B
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History:
From electronic version of the journal
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(End) James Marcout, Patricia Bauer [CDS] 18-Jan-2002