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J/A+A/543/A160      Normalized spectra of 82 Kepler red giants (Thygesen+, 2012)

Atmospheric parameters of 82 red giants in the Kepler field. Thygesen A.O., Frandsen, S., Bruntt H., Kallinger T., Andersen M.F., Elsworth Y.E., Hekker S., Karoff C., Stello D., Brogaard K., Burke C., Caldwell D.A., Christiansen J.L. <Astron. Astrophys. 543, A160 (2012)> =2012A&A...543A.160T
ADC_Keywords: Stars, giant ; Spectroscopy Keywords: stars: abundances - stars: fundamental parameters - methods: observational - techniques: spectroscopic Abstract: Accurate fundamental parameters of stars are essential for the asteroseismic analysis of data from the NASA Kepler mission. We aim at determining accurate atmospheric parameters and the abundance pattern for a sample of 82 red giants that are targets for the Kepler mission. We have used high-resolution, high signal-to-noise spectra from three different spectrographs. We used the iterative spectral synthesis method VWA to derive the fundamental parameters from carefully selected high-quality iron lines. After determination of the fundamental parameters, abundances of 13 elements were measured using equivalent widths of the spectral lines. Results: We identify discrepancies in logg and [Fe/H], compared to the parameters based on photometric indices in the Kepler Input Catalogue, Cat. V/133 (larger than 2.0dex for logg and [Fe/H] for individual stars). The Teff found from spectroscopy and photometry shows good agreement within the uncertainties. We find good agreement between the spectroscopic logg and the logg derived from asteroseismology. Also, we see indications of a potential metallicity effect on the stellar oscillations. We have determined the fundamental parameters and element abundances of 82 red giants. The large discrepancies between the spectroscopic logg and [Fe/H] and values in the Kepler Input Catalogue emphasize the need for further detailed spectroscopic follow-up of the Kepler targets in order to produce reliable results from the asteroseismic analysis. Description: Normalized spectra of 82 red giants in the Kepler Field. Target names are as found in the Kepler Input Catalogue (Kepler Mission Team 2009) Also included spectra of 10 well-studied bright giants observed for reference. 9 of the reference giants were chosen from the PASTEL catalogue (Soubiran et al., 2010, Cat. B/pastel) and one, HD205512, from the work of Luck & Heiter (2007AJ....133.2464L). All targets have been shifted to laboratory wavelength using the radial velocities quoted in the paper. Two columns are associated with each target file, containing wavelength and flux. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 51 92 List of studied giants sp/* 23 92 Individual spectra tablea1.dat 94 82 Fundamental atmospheric parameters for all red giants in our sample tablea2.dat 109 82 Elemental abundances for all targets where an asteroseismic logg could be determined
See also: V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) B/pastel : The PASTEL catalogue (Soubiran+, 2010-) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Name Star name 14- 15 I2 h RAh Right ascension (J2000) 17- 18 I2 min RAm Right ascension (J2000) 20- 24 F5.2 s RAs Right ascension (J2000) 26 A1 --- DE- Declination sign (J2000) 27- 28 I2 deg DEd Declination (J2000) 30- 31 I2 arcmin DEm Declination (J2000) 33- 37 F5.2 arcsec DEs Declination (J2000) 39- 51 A13 --- FileName Name of the spectrum file in subdirectory sp
Byte-by-byte Description of file: sp/*
Bytes Format Units Label Explanations
2- 11 F10.5 0.1nm lambda [3999/8850] Wavelength vector 14- 23 F10.8 --- nFlux Normalized flux
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [KIC] 5- 12 I8 --- KIC KIC (Cat. V/133) identification 14- 17 I4 K Teff1 Effective temperature with VWA (+/-80K) (1) 19- 22 F4.2 [cm/s2] logg1 Surface gravity with VWA (+/-0.2dex) (1) 24- 27 F4.2 km/s xi1 Microturbulent velocity with VWA (+/-0.15km/s) (1) 29- 33 F5.2 [Sun] [Fe/H]1 Metallicity from FeI and FeII (+/-0.15dex) (1) 35- 38 I4 K Teff2 ?=- Effective temperature with Kepler asteroseismic analysis (±100K) 40- 43 F4.2 [cm/s2] logg2 ?=- Surface gravity with Kepler asteroseismic analysis (±0.1dex) 45- 48 I4 K Teff3 ?=- Effective temperature with KIC (V/133) 50- 53 F4.2 [cm/s2] logg3 ?=- Surface gravity with KIC (V/133) 55- 59 F5.2 [Sun] [Fe/H]3 ?=- Metallicity with KIC (V/133) 61- 64 I4 K Teff ?=- VWA + Kepler effective temperature (2) 66- 70 F5.2 [Sun] [Fe/H] ?=- VWA + Kepler metallicity, FeII is used as the measure of [Fe/H] (2) 72- 75 F4.2 km/s xi ?=- VWA + Kepler microturbulent velocity xi (2) 77- 79 F3.1 km/s vsini Projected rotational velocity (±1.0km/s) 81- 83 F3.1 km/s vmacro Macroturbulent velocity (±1.0km/s) 85- 90 F6.1 km/s RV Radial velocity (±0.15km/s) 92- 94 A3 --- Type Giant type: RGB = red giant branch, RC = red clump, SC = secondary clump
Note (1): VWA software poackage (see Bruntt et al. 2004A&A...425..683B, 2008A&A...478..487B, 2010A&A...519A..51B), from spectroscopy. Note (2): values are determined with VWA by fixing the gravity from the asteroseismic Kepler value.
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [KIC] 5- 12 I8 --- KIC KIC (Cat. V/133) identification 13 A1 --- R [*] (KIC 9574235): abundances based on the spectroscopic (VWA) logg 15- 19 F5.2 [Sun] [C/H] ?=- [C/H] abundance (±0.5dex) 21- 25 F5.2 [Sun] [O/H] ?=- [O/H] abundance (±0.5dex) 27- 31 F5.2 [Sun] [Si/H] ?=- [Si/H] abundance (±0.2dex) 33- 37 F5.2 [Sun] [Ca/H] ?=- [Ca/H] abundance (±0.2dex) 39- 43 F5.2 [Sun] [Sc/H] ?=- [Sc/H] abundance (±0.2dex) 45- 49 F5.2 [Sun] [TiI/H] ?=- [TiI/H] abundance (±0.2dex) 51- 55 F5.2 [Sun] [TiII/H] ?=- [TiII/H] abundance (±0.2dex) 57- 61 F5.2 [Sun] [V/H] ?=- [V/H] abundance (±0.2dex) 63- 67 F5.2 [Sun] [CrI/H] ?=- [CrI/H] abundance (±0.2dex) 69- 73 F5.2 [Sun] [CrII/H] ?=- [CrII/H] abundance (±0.2dex) 75- 79 F5.2 [Sun] [Mn/H] ?=- [Mn/H] abundance (±0.2dex) 81- 85 F5.2 [Sun] [FeI/H] ?=- [FeI/H] abundance (±0.15dex) 87- 91 F5.2 [Sun] [FeII/H] ?=- [FeII/H] abundance (±0.15dex) 93- 97 F5.2 [Sun] [Co/H] ?=- [Co/H] abundance (±0.2dex) 99-103 F5.2 [Sun] [Ni/H] ?=- [Ni/H] abundance (±0.2dex) 105-109 F5.2 [Sun] [Y/H] ?=- [Y/H] abundance (±0.2dex)
History: * 16-Jul-2012: on-line spectra * 24-May-2013: tables A1 and A2 added Acknowledgements: Anders Thygesen, aot06(at)phys.au.dk
(End) A.O. Thygesen [ZAH, Heidelberg], Patricia Vannier [CDS] 25-May-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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