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J/MNRAS/458/2307 gamma Dor stars spectroscopic survey (Kahraman Alicavus+, 2016)

Spectroscopic survey of γ Doradus stars. I. Comprehensive atmospheric parameters and abundance analysis of γ Doradus stars. Kahraman Alicavus F., Niemczura E., De Cat P., Soydugan E., Kolaczkowski Z., Ostrowski J., Telting J.H., Uytterhoeven K., Poretti E., Rainer M., Suarez J.C., Mantegazza L., Kilmartin P., Pollard K.R. <Mon. Not. R. Astron. Soc., 458, 2307-2322 (2016)> =2016MNRAS.458.2307K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, peculiar ; Abundances ; Effective temperatures Keywords: stars: abundances - stars: chemically peculiar - stars: general - stars: rotation Abstract: We present a spectroscopic survey of known and candidate γ Doradus stars. The high-resolution, high signal-to-noise spectra of 52 objects were collected by five different spectrographs. The spectral classification, atmospheric parameters (Teff, logg, ξ), vsini and chemical composition of the stars were derived. The stellar spectral and luminosity classes were found between G0-A7 and IV-V, respectively. The initial values for Teff and logg were determined from the photometric indices and spectral energy distribution. Those parameters were improved by the analysis of hydrogen lines. The final values of Teff, logg and ξ were derived from the iron lines analysis. The Teff values were found between 6000K and 7900K, while log g values range from 3.8 to 4.5dex. Chemical abundances and vsin i values were derived by the spectrum synthesis method. The vsini values were found between 5 and 240km/s. The chemical abundance pattern of γ Doradus stars were compared with the pattern of non-pulsating stars. It turned out that there is no significant difference in abundance patterns between these two groups. Additionally, the relations between the atmospheric parameters and the pulsation quantities were checked. A strong correlation between the vsini and the pulsation periods of γ Doradus variables was obtained. The accurate positions of the analysed stars in the Hertzsprung-Russell diagram have been shown. Most of our objects are located inside or close to the blue edge of the theoretical instability strip of γ Doradus. Description: The observations of our targets were carried out with five high-resolution spectrographs, FEROS, FIES, HARPS, HERCULES and HERMES, between 2007 abd 2011. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 68 52 Spectroscopic observations and the spectral classification of the investigated stars table3.dat 60 52 The E(B-V) values and atmospheric parameters derived from the photometric indices and SED analysis table4.dat 59 52 Atmospheric parameters obtained from the hydrogen and iron lines analysis
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 7- 8 A2 --- n_HD [* ] ** = SB1 stars 12- 19 A8 --- Inst Instruments 21- 22 I2 --- Nsp Number of spectra 24- 27 F4.2 mag Vmag V magnitude 29- 36 A8 --- SpTypeS Simbad spectral type 38- 48 A11 --- SpType This study spectral type (1) 50- 65 A16 --- Notes Notes 67- 68 I2 --- Ref References (2)
Note (1): Notations: IV/V = between IV-V IV-V = whether IV or V nn = very rapid rotators m-* = metallicity class where * represents number Am = mild Am star cand = candidate Note (2): References as follows: 1 = Henry et al. (2007, Cat. J/AJ/133/1421) 2 = Handler (1999MNRAS.309L..19H) 3 = Martin & Rodriguez (2000A&A...358..287M) 4 = De Cat et al. (2006A&A...449..281D) 5 = Eyer (1998, PhD thesis, Genera University) 6 = Henry et al. (2011, Cat. J/AJ/142/39) 7 = Aerts, Eyer & Kestens (1998A&A...337..790A) 8 = Dubath et al. (2011, Cat. J/MNRAS/414/2602) 9 = Fekel et al. (2003AJ....125.2196F) 10 = Henry et al. (2001AJ....122.3383H) 11 = Poretti et al. (2003A&A...406..203P) 12 = Henry & Fekel (2005, Cat. J/AJ/129/2026) 13 = Handler & Shobbrook (2002MNRAS.333..251H) 14 = Krisciunas & Handler (1995IBVS.4195....1K) 15 = Uytterhoeven et al. (2011, preprint, arXiv:1111.1840) 16 = Mathias et al. (2003, Proc. 4th COROT Week, Spectroscopic studies of γ Doradus stars in potential Corot fields, Marseille)
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 8- 11 F4.2 mag E(B-V)M E(B-V) from Map 13- 16 F4.2 mag E(B-V)NaD2 E(B-V) from NaD2 18- 21 I4 K Teff1 ? ubvyβ effective temperature (±95) 23- 26 F4.2 [cm/s2] logg1 ? ubvyβ surface gravity (±0.10) 28- 31 I4 K Teff2 ? Geneva effective temperature (±125) 33- 36 F4.2 [cm/s2] logg2 ? Geneva surface gravity (±0.11) 38- 41 I4 K Teff3 UBV effective temperature (±170) 43- 46 I4 K Teff4 2MASS effective temperature (±80) 48- 51 I4 K Teff5 Average effective temperature (±245) (1) 53- 56 I4 K Teff6 SED effective temperature 58- 60 I3 K e_Teff6 rms uncertainty on Teff6
Note (1): Represents the average values of effective temperature obtained from different photometric systems.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 8- 11 I4 K TeffH H lines effective temperature 13- 15 I3 K e_TeffH rms uncertainty on TeffH 17- 20 I4 K TeffFe Fe lines effective temperature 22- 24 I3 K e_TeffFe rms uncertainty on TeffFe 26- 28 F3.1 [cm/s2] loggFe Fe lines surface gravity 30- 32 F3.1 [cm/s2] e_loggFe rms uncertainty on loggFe 34- 36 F3.1 km/s xi Microtrubulent velocity 38- 40 F3.1 km/s e_xi rms uncertainty on xi 42- 44 I3 km/s vsini Rotational velocity 46- 47 I2 km/s e_vsini rms uncertainty on vsini 49- 52 F4.2 [-] logeps(Fe) Fe abundance 54- 57 F4.2 [-] e_logeps(Fe) rms uncertainty on logeps(Fe) 59 A1 --- Note [*] * for previously determined spectroscopic atmospheric parameters (1)
Note (1): Previously determined spectroscopic atmospheric parameters: HD 23585 : Teff=7440K, logg=4.29, ξ=3.0km/s (Gray, Graham & Hoyt 2001, Cat. J/AJ/121/2159) HD 26298 : Teff=6790/-200K, logg=3.95/-0.22, ξ=1.5/-0.5km/s (Bruntt et al. 2008A&A...478..487B) HD 33204 : Teff=7646K, logg=4.11, ξ=3.4 (Varenne & Monier, 1999A&A...351..247V) HD 46304 : Teff=7048/-16K, (Munoz Bermejo et al., 2013, Cat. J/A+A/553/A95) HD 63436 : Teff=6970K, logg=4.14 (Munoz Bermejo et al., 2013, Cat. J/A+A/553/A95) HD 99329 : Teff=6990K, (Ammler-von Eiff & Reiners 2012, Cat. J/A+A/542/A116) HD106103 : Teff=6610K (Munoz Bermejo et al., 2013, Cat. J/A+A/553/A95) HD109799 : Teff=6926/-26K (King & Schuler, 2005PASP..117..911K) HD110379 : Teff=7140/-160K, logg=4.21/-0.02, ξ=1.5/-0.4km/s (Bruntt et al. 2008A&A...478..487B) HD112934 : Teff=7035K, (Ammler-von Eiff & Reiners 2012, Cat. J/A+A/542/A116) HD126516 : Teff=6590/-120K, logg=4.01/-0.15, ξ=1.9/-0.3km/s (Bruntt et al. 2008A&A...478..487B) HD209295 : Teff=7392K (Ammler-von Eiff & Reiners 2012, Cat. J/A+A/542/A116)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 15-Feb-2017
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