J/A+A/551/A12 HD 48977 frequency analysis (Thoul+, 2013)
High-precision CoRoT space photometry and fundamental parameter determination of
the B2.5V star HD 48977.
Thoul A., Degroote P., Catala C., Aerts C., Morel T., Briquet M.,
Hillen M., Raskin G., Van Winckel H., Auvergne M., Baglin A., Baudin F.,
Michel E.
<Astron. Astrophys., 551, A12 (2013)>
=2013A&A...551A..12T 2013A&A...551A..12T
ADC_Keywords: Stars, variable ; Spectroscopy
Keywords: asteroseismology - stars: individual: HD 48977 - stars: abundances -
stars: fundamental parameters - stars: oscillations -
techniques: photometric
Abstract:
We present the CoRoT light curve of the bright B2.5V star HD 48977
observed during a short run of the mission in 2008, as well as a
high-resolution spectrum gathered with the HERMES spectrograph at the
Mercator telescope. We use several time series analysis tools to
explore the nature of the variations in the light curve. We performed
a detailed analysis of the spectrum of the star to determine its
fundamental parameters and its element abundances. We find a large
number of high-order g-modes, and one rotationally induced frequency.
We find stable low-amplitude frequencies in the p-mode regime as well.
Description:
HD 48977 was observed by CoRoT with a cadence of 32s during a
short run in 2008, from 2454531.48027 JD (5 May) to 2454556.76361
(31 May), i.e., during some 25 days.
Objects:
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RA (2000) DE Designation(s)
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06 46 32.42 +08 35 13.8 HD 48977 = HR 2494
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 50 55 Frequencies in the light curve of HD 48977
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See also:
J/A+A/506/111 : Frequency analysis of HD 180642 (V1449 Aql) (Degroote+, 2009)
J/A+A/506/471 : Frequency analysis of CoRoT B stars (Degroote+, 2009)
J/A+A/525/A23 : Frequency analysis of HD 49434 (Mathias+, 2011)
J/A+A/544/A106 : p-mode frequencies of the solar twin 18 Sco (Bazot+, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- No Sequential number of the frequency
4- 9 F6.1 ppm Ampl Amplitude
11- 15 F5.1 ppm e_Ampl rms uncertainty on Ampl
18- 24 F7.4 d-1 Freq Frequency
26- 31 F6.4 d-1 e_Freq rms uncertainty on Freq
33- 39 F7.4 --- phi [-0.5/0.5] Phase φ, given with respect to
t0=0 (in 2πrad units)
41- 44 F4.2 --- e_phi rms uncertainty on phi
47- 50 F4.1 --- SN2 Signal-to-noise in a 6d-1 bin around the peak
after each prewhitening step
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 17-May-2013