Access to Astronomical Catalogues

← Click to display the menu
J/A+A/517/A3  Stellar parameters of Kepler early-type targets (Catanzaro+, 2010)

Characterization of Kepler early-type targets. Catanzaro G., Frasca A., Molenda-Zakowicz J., Marilli E. <Astron. Astrophys. 517, A3 (2010)> =2010A&A...517A...3C
ADC_Keywords: Stars, early-type ; Abundances ; Spectroscopy ; Photometry, uvby Keywords: stars: early-type - stars: abundances - stars: fundamental parameters - stars: binaries: spectroscopic Abstract: Stellar pulsation offers a unique opportunity to constrain the intrinsic parameters of stars and to unveil their inner structure. Kepler satellite is collecting a huge amount of data of unprecedent photometric precision, that will allow us to test theory and obtain a very precise tomography of stellar interiors. Aiming at providing the stars' fundamental parameters (Teff, logg, vsini, and luminosity) which are needed for computing asteroseismic models and interpreting Kepler data, we report spectroscopic observations of 23 early-type Kepler asteroseismic targets and 13 other stars in the Kepler field, but not selected to be observed. The cross-correlation with template spectra was used for measuring the radial velocity with the aim of identifying non-single stars. Spectral synthesis has been performed in order to derive the stellar parameters for our target stars. State-of-art LTE atmospheric models have been computed. For all the stars of our sample, we derive the radial velocity, Teff, logg, vsini, and luminosities. Further, for 12 stars, we perform a detailed abundance analysis of 20 species; for 16, we could derive only the [Fe/H] ratio. A spectral classification has been also performed for 17 stars in the sample. We found two double-lined spectroscopic binaries, HIP96299 and HIP98551, the former of which is an already known eclipsing binary, and two single-lined spectroscopic binaries, HIP97254 and HIP97724. We also report two suspected spectroscopic binaries, HIP92637 and HIP96762, and the detection of a possible variability of the radial velocity of HIP96277. Two of our program stars turn out to be chemically peculiar, namely HIP93941, which we classify as B2 He-weak, and HIP96210, which we classify as B6Mn. Finally, we find that HIP93522, HIP93941, HIP93943, HIP96210 and HIP96762, are very slow rotators (vsini<20km/s) which makes them very interesting and promising targets for an asteroseismic modeling. Description: Optical spectroscopy obtained with the 0.91m telescope of the Catania Astrophysical Observatory is presented in Table 3. For 14 stars, Stromgren photometry is also presented in Table 2. The chemical abundances derived for 12 stars are reported in Table 4. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 92 14 Stromgren photometry for 14 stars table3.dat 121 42 Stellar parameters derived for our sample stars table4.dat 21 106 Chemical abundances for 12 stars sp/* 0 40 FITS spectra for the sample stars
See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 I5 --- HIP Hipparcos number (I/239) 7- 12 F6.3 mag Vmag V magnitude 14- 18 F5.3 mag e_Vmag V magnitude error 20- 25 F6.3 mag b-y b-y color index 27- 31 F5.3 mag e_b-y b-y color index error 33- 37 F5.3 mag m1 m1 color index 39- 43 F5.3 mag e_m1 m1 color index error 45- 50 F6.3 mag c1 c1 color index 52- 56 F5.3 mag e_c1 c1 color index error 58- 62 F5.3 mag beta Hbeta index 64- 68 F5.3 mag e_beta Hbeta index error 70- 74 I5 K Teff Effective Temperature 76- 79 F4.2 [cm/s2] logg Surface gravity 81- 85 F5.2 mag VMAG Absolute V magnitude 87- 92 F6.3 mag dm0 Distance modulus
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1 A1 --- n_HIP [Kn] K: Kepler asteroseismic targets or n: stars not selected as Kepler targets 3- 7 I5 --- HIP Hipparcos number (I/239) 8 A1 --- m_HIP [AB] Multiplicity index in HIP 10- 17 I8 --- KIC ? Kepler Input Catalogue number 19- 23 F5.2 mag Vmag ? V magnitude 25- 29 F5.2 mas Plx ? Hipparcos parallax 31- 34 F4.2 mas e_Plx ? Parallax error 36- 37 A2 --- SpT MK spectral type 39 I1 --- e_SpT ? Spectral type error 41- 45 I5 K Teff ? Effective temperature 47- 50 I4 K e_Teff ? Effective temperature error 52- 54 F3.1 [cm/s2] logg ? Surface gravity 56- 58 F3.1 [cm/s2] e_logg ? Surface gravity error 60- 62 I3 km/s vsini ? Projected rotational velocity 64- 72 F9.3 d HJD Reduced Heliocentric Julian Day (HJD-2400000) 74- 78 F5.1 km/s RV Radial Velocity 80- 83 F4.1 km/s e_RV Radial Velocity error 85- 88 F4.2 solLum logL ? Luminosity 90- 93 F4.2 solLum e_logL ? Luminosity error left (lower limit) 95- 98 F4.2 solLum E_logL ? Luminosity error right (upper limit) 100-121 A22 --- FileName Name of the FITS spectra in subdirectory sp
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 5 I5 --- HIP Hipparcos number (I/239) 7- 8 I2 --- Z Atomic number 11- 12 A2 --- X Atomic symbol 14- 17 F4.1 [Sun] Abun Abundance 19- 21 F3.1 [Sun] e_Abun Abundance error
Acknowledgements: Gianni Catanzaro, gca(at)
(End) Giovanni Catanzaro [INAF-OACt, Italy], Patricia Vannier [CDS] 25-Mar-2010
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

catalogue service

© Unistra/CNRS