J/A+A/506/95 Fourier analysis of HD 49330 CoRoT light curve (Huat+, 2009)
The B0.5IVe CoRoT target HD 49330.
I. Photometric analysis from CoRoT data.
Huat A.-L., Hubert A.-M., Baudin F., Floquet M., Neiner C., Fremat Y.,
Gutierrez-Soto J., Andrade L., de Batz B., Diago P.D., Emilio M.,
Espinosa Lara F., Fabregat J., Janot-Pacheco E., Leroy B., Martayan C.,
Semaan T., Suso J., Auvergne M., Catala C., Michel E., Samadi R.
<Astron. Astrophys. 506, 95 (2009)>
=2009A&A...506...95H 2009A&A...506...95H
ADC_Keywords: Stars, early-type ; Stars, Be ; Photometry
Keywords: stars: early-type - stars: emission-line, Be -
stars: individual: HD 49330 - stars: rotation - stars: oscillations
Abstract:
Be stars undergo outbursts producing a circumstellar disk from the
ejected material. The beating of non-radial pulsations has been put
forward as a possible mechanism of ejection.
We analyze the pulsational behavior of the early B0.5IVe star HD 49330
observed during the first CoRoT long run towards the Galactical
anticenter (LRA1). This Be star is located close to the lower edge of
the β Cephei instability strip in the HR diagram and showed a
0.03mag outburst during the CoRoT observations. It is thus an ideal
case for testing the aforementioned hypothesis.
Description:
This work analyses the high precision photometric light curve obtained
for the CoRoT target HD49330 (B0.5 IVe) which was observed during
136.886 days with a sample of 32s. During the CoRoT run the star
underwent an outburst often observed in hot Be star. The CoRoT light
curve was analysed using Fourier methods and non-linear least square
fitting.
Objects:
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RA (2000) DE Designation(s)
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06 47 57.3 +00 46 34 HD 49330 = HIP 32586
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 66 77 *Independent frequencies found by TiSAFT for the
entire light curve of HD 49330
table4.dat 74 110 *Frequencies found by TiSAFT for the
relative quiescence phase of HD 49330
table5.dat 73 103 *Frequencies found by TiSAFT for the
precursor phase of HD 49330
table6.dat 67 74 *Frequencies found by TiSAFT for the
outburst phase of HD 49330
table7.dat 73 65 *Frequencies found by TiSAFT for the
relaxation phase of HD 49330
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Note on table*.dat: A confidence level of 99% has been used for this study.
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See also:
B/corot : CoRoT observation log (CoRoT, 2009)
J/A+A/451/1053 : Fundamental parameters of Be stars (Fremat+, 2006)
Byte-by-byte Description of file: table?.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Num Number of the frequency (FNN)
7- 13 F7.4 d-1 Freq Value of the frequency in c/d
15- 23 F9.5 uHz Frequ Value of the frequency in µHz
25- 29 F5.3 mmag Ampl Amplitude of the frequency
31- 40 E10.4 mmag e_Ampl Error on the amplitude
42- 45 F4.2 rad Phi Phase given between 0 and 2pi
47- 55 E9.3 rad e_Phi Error on the phase given in radian
57- 74 A18 --- Comm Comments
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Acknowledgements:
Anne-Laure Huat, anne-laure.huat(at)obspm.fr
(End) Patricia Vannier [CDS] 08-Sep-2009