A fresh look at the seismic spectrum of HD49933: analysis of 180 days of CoRoT photometry

@article{Benomar2009AFL,
  title={A fresh look at the seismic spectrum of HD49933: analysis of 180 days of CoRoT photometry},
  author={O. Benomar and F. Baudin and T. Campante and W. Chaplin and R. Garc'ia and P. Gaulme and T. Toutain and G. Verner and T. Appourchaux and J. Ballot and C. Barban and Y. Elsworth and S. Mathur and B. Mosser and C. R'egulo and I. Roxburgh and M. Auvergne and A. Baglin and C. Catal{\`a} and E. Michel and R. Samadi},
  journal={Astronomy and Astrophysics},
  year={2009},
  volume={507}
}
Context. Solar-like oscillations have now been observed in several stars, thanks to ground-based spectroscopic observations and space-borne photometry. CoRoT, which has been in orbit since December 2006, has observed the star HD49933 twice. The oscillation spectrum of this star has proven difficult to interpret. Aims. Thanks to a new timeseries provided by CoRoT, we aim to provide a robust description of the oscillations in HD49933, i.e., to identify the degrees of the observed modes, and to… Expand
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References

SHOWING 1-10 OF 14 REFERENCES
The solar-like oscillations of HD 49933: a Bayesian approach
Context. Asteroseismology has entered a new era with the availability of continuous observations from space-borne missions such as MOST, CoRoT and Kepler. However, the low amplitude and the… Expand
Mode width fitting with a simple Bayesian approach - Application to CoRoT targets HD 181420 and HD 49933
Aims. We investigate the asteroseismology of two solar-like targets as observed with the CoRoT satellite, with particular attention paid to the mode fitting. HD 181420 and HD 49933 are typical CoRoT… Expand
Seismology and activity of the F type star HD 49933
A 10-night asteroseismic observation programme has been conducted in January 2004 with the spectrometer Harps at the ES0 3.6-m telescope. The selected target, the 6th magnitude F5V star HD 49933, was… Expand
CoRoT sounds the stars: p-mode parameters of Sun-like oscillations on HD 49933
Context. The first asteroseismology results from CoRoT are presented, on a star showing Sun-like oscillations. We have analyzed a 60 day lightcurve of high-quality photometric data collected by CoRoT… Expand
Short-lived spots in solar-like stars as observed by CoRoT
Context. CoRoT light curves have an unprecedented photometric quality, having simultaneously a high signal-to-noise ratio, a long time span and a nearly continuous duty-cycle. Aims. We analyse the… Expand
Improved fundamental parameters and LTE abundances of the CoRoT solar-type pulsator HD 49933
Aims. The knowledge of accurate stellar parameters is a key stone in several fields of stellar astrophysics, such as asteroseismology and stellar evolution. Although the parameters can be derived… Expand
Accurate fundamental parameters of CoRoT asteroseismic targets - The solar-like stars HD 49933, HD 175726, HD 181420, and HD 181906
Context. The CoRoT satellite has provided high-quality light curves of several solar-like stars. Analysis of these light curves provides oscillation frequencies that make it possible to probe the… Expand
A spectroscopic study of southern (candidate) gamma Doradus stars. II. Detailed abundance analysis and fundamental parameters
Context. The γ Doradus stars are a recent class of variable main sequence F-type stars located on the red edge of the Cepheid instability strip. They pulsate in gravity modes, and this makes them… Expand
On the detection of Lorentzian profiles in a power spectrum: a Bayesian approach using ignorance priors
Aims. Deriving accurate frequencies, amplitudes, and mode lifetimes from stochastically driven pulsation is challenging, more so, if one demands that realistic error estimates be given for all model… Expand
Excitation of solar-like oscillations across the HR diagram
Aims. We extend semi-analytical computations of excitation rates for solar oscillation modes to those of other solar-like oscillating stars to compare them with recent observations Methods. Numerical… Expand
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