J/A+A/559/A63 Photometric frequencies of HD 174966 (Garcia Hernandez+, 2013)
An in-depth study of HD 174966 with CoRoT photometry and HARPS spectroscopy.
Large separation as a new observable for delta Scuti.
Garcia Hernandez A., Moya A., Michel E., Suarez J.C., Poretti E.,
Martin-Ruiz S., Amado P., Garrido R., Rodriguez E., Rainer M.,
Uytterhoeven K., Rodrigo C., Solano E., Rodon J.R., Mathias P., Rolland A.,
Auvergne M., Baglin A., Baudin F., Catala C., Samadi R.
<Astron. Astrophys. 559, A63 (2013)>
=2013A&A...559A..63G 2013A&A...559A..63G
ADC_Keywords: Stars, variable ; Spectroscopy
Keywords: asteroseismology - stars: oscillations -
stars: variables: delta Scuti - stars: interiors -
stars: fundamental parameters - stars: rotation
Abstract:
The aim of this work was to use a multi-approach technique to derive
the most accurate values possible of the physical parameters of the
delta Sct star HD 174966, which was observed with the CoRoT
satellite. In addition, we searched for a periodic pattern in the
frequency spectra with the goal of using it to determine the mean
density of the star.
First, we extracted the frequency content from the CoRoT light curve.
Then, we derived the physical parameters of HD 174966 and carried a
mode identification out from the spectroscopic and photometric
observations. We used this information to look for the models
fulfilling all the conditions and discussed the inaccuracies of the
method because of the rotation effects. In a final step, we searched
for patterns in the frequency set using a Fourier transform, discussed
its origin, and studied the possibility of using the periodicity to
obtain information about the physical parameters of the star.
Description:
Frequencies from the CoRoT light curve for HD 174966. The frequency in
d-1) and uHz, the amplitude, phase, spectral significance, and S/N
are listed, as well as the r.m.s. (before extracting the peak) and the
errors in the determination of the frequencies, amplitudes, and
phases. The last column contains the close frequencies (closer than
the frequency resolution) and the possible combinations.
Objects:
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RA (2000) DE Designation(s)
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18 53 07.83 +01 45 19.7 HD 174966 = HIP 92683
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
freqs.dat 140 185 HD 174966 photometric frequencies from CoRoT
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See also:
J/A+A/506/79 : HD 174936 asteroseismic analysis (Garcia Hernandez+, 2009)
J/A+A/506/85 : HD 50844 observed by CoRoT (Poretti+, 2009)
J/A+A/506/143 : Pulsations of HD 181231 (Neiner+, 2009)
J/A+A/525/A23 : Frequency analysis of HD 49434 (Mathias+, 2011)
J/MNRAS/415/1577 : CoRoT 105288363 Blazhko modulation (Guggenberger+, 2011)
J/A+A/551/A12 : HD 48977 frequency analysis (Thoul+, 2013)
J/A+A/556/A87 : CoRot 100866999 frequency analysis (Chapellier+, 2013)
Byte-by-byte Description of file: freqs.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [F]
2- 4 I3 --- ID [1/185] Frequency ID number
6- 16 F11.8 d-1 Freq1 [0.049/77.12] Frequency in cycles per day
18- 29 F12.8 uHz Freq2 Frequency in µHertz
31- 36 F6.4 mmag Amp [0.007/6.3] Amplitude of the frequency
38- 46 F9.6 rad Phase [-3.14/3.141] Phase of the frequency
48- 56 F9.3 --- Sig [10/11621] Spectral significance of the frequency
58- 65 F8.3 --- S/N [3.6/3385] Signal-to-noise ratio of the frequency
67- 71 F5.3 mmag rms Root mean square before extracting the frequency
73- 82 F10.8 d-1 e_Freq1 Error in the determination of the frequency
84- 89 F6.4 mmag e_Amp Error in the determination of the amplitude
91- 98 F8.6 rad e_Phase Error in the determination of the phase
100-140 A41 --- Com Close frequencies and possible combinations
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Acknowledgements:
Antonio Garcia Hernandez, agh(at)astro.up.pt
(End) A. Garcia Hernandez [CAUP, Portugal], P. Vannier [CDS] 27-Sep-2013