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J/A+A/534/A125   Variability of A- and F-stars from Kepler  (Uytterhoeven+ 2011)

The Kepler characterization of the variability among A- and F-type stars. I. General overview Uytterhoeven K., Moya A., Grigahcene A., Guzik J.A., Gutierrez-Soto J., Smalley B., Handler G., Balona L.A., Niemczura E., Fox Machado L., Benatti S., Chapellier E., Tkachenko A., Szabo R., Suarez J.C., Ripepi V., Pascual J., Mathias P., Martin-Ruiz S., Lehmann H., Jackiewicz J., Hekker S., Gruberbauer M., Garcia R.A., Dumusque X., Diaz-Fraile D., Bradley P., Antoci V., Roth M., Leroy B., Murphy S.J., De Cat P., Cuypers J., Kjeldsen H., Christensen-Dalsgaard J., Breger M., Pigulski A., Kiss L.L., Still M., Thompson S.E., Van Cleve J. <Astron. Astrophys. 534, A125 (2011)> =2011A&A...534A.125U
ADC_Keywords: Stars, variable ; Stars, A-type ; Stars, F-type ; Photometry ; Binaries, eclipsing ; Effective temperatures Keywords: stars: oscillations - stars: fundamental parameters - binaries: general - asteroseismology - stars: variables: delta Scuti - stars: statistics Abstract: The Kepler spacecraft is providing time series of photometric data with micromagnitude precision for hundreds of A-F type stars. We present a first general characterization of the pulsational behaviour of A-F type stars as observed in the Kepler light curves of a sample of 750 candidate A-F type stars, and observationally investigate the relation between γ Doradus (γ Dor), δ Scuti (δ Sct), and hybrid stars. Description: We compile a database of physical parameters for the sample stars from the literature and new ground-based observations. We analyse the Kepler light curve of each star and extract the pulsational frequencies using different frequency analysis methods. We construct two new observables, 'energy' and 'efficiency', related to the driving energy of the pulsation mode and the convective efficiency of the outer convective zone, respectively. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 148 750 Database of 750 Kepler A-F stars table2.dat 170 750 Effective temperature, gravity and rotation velocities for the 750 stars notes.dat 80 64 Notes and references to table1 and table2 table3.dat 76 477 Classification and characterization of δ Sct, γ Dor and hybrid stars table4.dat 32 273 Classification of the stars that do not belong to the δ Sct, γ Dor or hybrid groups
See also: V/133 : Kepler Input Catalog (KIC, Kepler Mission Team, 2009) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
2- 9 I8 --- KIC Kepler Input Catalogue identifier (Cat. V/133) 11- 12 I2 h RAh Right ascension (J2000.0) 14- 15 I2 min RAm Right ascension (J2000.0) 17- 21 F5.2 s RAs Right ascension (J2000.0) 23 A1 --- DE- Declination sign (J2000.0) 24- 25 I2 deg DEd Declination (J2000.0) 27- 28 I2 arcmin DEm Declination (J2000.0) 30- 33 F4.1 arcsec DEs Declination (J2000.0) 35- 38 F4.1 mag Kp Kepler magnitude 41- 66 A26 --- SpType MK Spectral type (reference embedded) 68- 84 A17 --- Names Other name(s) 86-115 A30 --- Notes Remarks about the nature of the star (embedded references) 116-121 I6 --- Ndat Number of Kepler datapoints 123-127 F5.1 d Tspan Total timespan of the Kepler lightcurve 129-133 F5.1 d Tgap Longest timegap in the Kepler lightcurve 135-139 A5 --- Q.LC Available quarters in Long Cadence mode 142-148 A7 --- Q.SC Available quarters in Short Cadence mode
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
2- 9 I8 --- KIC Kepler Input Catalogue identifier 11 A1 --- n_KIC [o] indicates a spectroscopic binary 15- 19 I5 K TeffK ? Effective temperature from KIC (1) 21- 25 I5 K Teff1 ? Effective temperature from the literature 27- 30 I4 K e_Teff1 ? Error on Teff1 31 A1 --- r_Teff1 Reference for Teff1 36- 40 I5 K Teff2 ? Effective temperature from the literature 44- 46 I3 K e_Teff2 ? Error on Teff2 47 A1 --- r_Teff2 Reference for Teff2 50- 54 I5 K Teff3 ? Effective temperature from the literature 58- 60 I3 K e_Teff3 ? Error on Teff3 61 A1 --- r_Teff3 Reference for Teff3 65- 69 I5 K Teff ? Adopted effective temperature 72- 75 I4 K e_Teff ? Error on the adopted effective temperature 77 A1 --- r_Teff Reference for Teff 81- 84 F4.2 [cm/s2] loggK ? logg value from KIC (2) 86- 89 F4.2 [cm/s2] logg1 ? logg value from the literature 93- 96 F4.2 [cm/s2] e_logg1 ? Error on the logg value from the literature 97 A1 --- r_logg1 Reference for logg1 103-106 F4.2 [cm/s2] logg2 ? logg value from the literature 110-113 F4.2 [cm/s2] e_logg2 ? Error on the logg value from the literature 114 A1 --- r_logg2 Reference for logg2 120-123 F4.2 [cm/s2] logg ? Adopted logg value 127-130 F4.2 [cm/s2] e_logg ? Error on the adopted logg value 131 A1 --- r_logg Reference for n_logg 136-140 F5.1 km/s vsini1 ? vsini value from the literature 142-143 I2 km/s e_vsini1 ? Error on vsini1 144 A1 --- r_vsini1 Reference for vsini1 159-163 F5.1 km/s vsini2 ? vsini value from the literature 165-166 I2 km/s e_vsini2 ? Error on vsini2 168-170 A3 --- r_vsini2 Reference for vsini2
Note (1): The estimated error on the effective temperature is 290K Note (2): The estimated error on the logg value is 0.3[cm/s2]
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Note Note number 4- 80 A77 --- Text Text of note
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
2- 9 I8 --- KIC Kepler Input Catalogue identifier 11- 16 A6 --- Class Classification as dSct (delta Scuti), hybrid or gDor (γ Doradus) (G1) 18- 21 I4 --- N Number of independent frequencies 23- 25 I3 --- Ng Number of independent γ Doradus-type frequencies 27- 29 I3 --- Nd Number of independent δ Scuti-type frequencies 31- 34 I4 --- Ntot Total number of detected frequencies 36 A1 --- --- [[] 37- 40 F4.1 d-1 fg.min ? Lower boundary of the detected frequency range for γ Doradus (gDor)-type frequencies 41 A1 --- --- [,] 42- 45 F4.1 d-1 fg.max ? Upper boundary of the detected frequency range for γ Doradus (gDor)-type frequencies 46 A1 --- --- []] 48 A1 --- --- [[] 49- 52 F4.1 d-1 fd.min ? Lower boundary of the detected frequency range for δ Scuti (dSct)-type frequencies 53 A1 --- --- [,] 54- 58 F5.1 d-1 fd.max ? Upper boundary of the detected frequency range for δ Scuti (dSct)-type frequencies 59 A1 --- --- []] 62- 67 I6 10-6 amp Highest detected amplitude (in ppm) 69- 74 F6.3 d-1 f Frequency associated to the highest amplitude 76 A1 --- Flag [*] Flag indicating a high contamination factor
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
2- 9 I8 --- KIC Kepler Input Catalogue identifier 11- 30 A20 --- Class Classification (G1) 32 A1 --- Flag [*] Flag indicating a high contamination factor
Global Notes: Note (G1): the classes are: Bstar = B star SPB = slowly pulsating B star bCep = β Cep variable Cepheid = classical (δ Cep) variable EB = eclipsing binary dSct = δ Scuti variable gDor = γ Doradus variable hybrid = hybrid star binary = binary star contaminated = contaminated star red giant = red giant star solar-like = solar-like star rotation/activity = rotationally modulated/active star
Acknowledgements: Katrien Uytterhoeven, katrien(at)iac.es
(End) Francois Ochsenbein [CDS] 23-Jul-2011
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