J/A+A/614/A46 delta Scuti stars <Teff>-νmax relation (Barcelo Forteza+, 2018)
The envelope of the power spectra of over a thousand delta Scuti stars.
The <Teff>-νmax scaling relation.
Barcelo Forteza S., Roca Cortes T., Garcia R.A.
<Astron. Astrophys. 614, A46 (2018)>
=2018A&A...614A..46B 2018A&A...614A..46B (SIMBAD/NED BibCode)
ADC_Keywords: Asteroseismology ; Stars, variable ; Effective temperatures
Keywords: asteroseismology - stars: variables: delta Scuti stars: oscillations -
Abstract:
CoRoT and Kepler high-precision photometric data allowed the detection
and characterization of the oscillation parameters in stars other than
the Sun. Moreover, thanks to the scaling relations, it is possible to
estimate masses and radii for thousands of solar-type oscillating
stars. Recently, a Δν-ρ relation has been found for
delta Scuti stars. Now, analysing several hundreds of this kind of
stars observed with CoRoT and Kepler, we present an empiric relation
between their frequency at maximum power of their oscillation spectra
and their effective temperature. Such a relation can be explained with
the help of the κ-mechanism and the observed dispersion of the
residuals is compatible with they being caused by the
gravity-darkening effect.
Description:
The seismic characterization of over one thousand of delta Scuti stars
using CoRoT and Kepler light curves is presented. The frequency at
maximum power and their predicted mean effective temperature is
obtained for those non-hybrid delta Scuti stars. Comparing the mean
effective temperature with the measured effective temperature allowed
us to constrain the rotation rate and the inclination values.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 72 1055 Rotation rate and inclination limits of our
stars' sample
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)
J/ApJS/211/2 : Revised stellar properties of Q1-16 Kepler targets (Huber+ 2014)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- KIC Kepler ID of the star
10- 12 I3 uHz nu-max ?=- Frequency at maximum power
14- 15 I2 uHz e_nu-max ? rms uncertainty on nu-max
17- 20 I4 K <Teff> ?=- Mean effective temperature
22- 24 I3 K e_<Teff> ? rms uncertainty on <Teff>
26- 30 I5 K Teff Mesured effective temperature (1)
32- 33 A2 --- l_Omega/OmegaK [≳ ] Limit flag on Omega/OmegaK
34- 36 I3 % Omega/OmegaK ?=- Rotation rate limits
38- 39 A2 --- l_i [<≳ ] Limit flag on i
40- 41 I2 deg i ? Inclination limits
44- 72 A29 --- Com Comments
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Note (1): Measured temperature with an estimated error of 250K
(Brown et al., 2011, Cat. J/AJ/142/112, Huber et al., 2014, Cat. J/ApJS/211/2).
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Acknowledgements:
Sebastia Barcelo Forteza, sebastia_ext(at)iac.es
(End) S. Barcelo Forteza [CAB (CSIC-INTA), Spain], P. Vannier [CDS] 22-Feb-2018