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First asteroseismic results from CoRoT
Auvergne, M.; Fridlund, M.; Ribas, I. +64 more
About one year after the end of the first observational run and six months after the first CoRoT data delivery, we comment the data exploitation progress for different types of stars. We consider first results to illustrate how these data of unprecedented quality shed a new light on the field of stellar seismology.
First results on the Be stars observed with the CoRoT satellite
Neiner, C.; Janot-Pacheco, E.; Floquet, M. +13 more
In this paper we present an overview of the analysis of some of the Be stars observed with the CoRoT satellite up to this date. Be stars are very fast-rotating B-type stars which may pulsate as β Cephei or SPB stars. CoRoT has already observed 5 bright Be stars in the seismology fields and several tens of fainter ones in the exoplanet fields with …
The pulsations of the B5IVe star HD181231 revealed by CoRoT
Neiner, C.; Janot-Pacheco, E.; Floquet, M. +12 more
We present the first results of the analysis of the light curve of the B5IVe star HD 181231 obtained during a long run (5 months) of the CoRoT mission. The light curve shows clear pulsations and even beating effects. Several frequencies are detected. Ground-based spec- troscopic data have also been analyzed and help to determine the rotation frequ…
Solar-like oscillations in red giants in the CoRoT exofield
De Ridder, J.; Barban, C.; Hekker, S. +4 more
Asteroseismic observations from space can provide us with long time series of uninterrupted high quality data for many stars at the same time. The CoRoT satellite (Convection Rota- tion and planetary Transits) was launched successfully in December 2006 and provides high precision photometery for a large number of stars. Here we present our researc…
Analysing the Hipparcos epoch photometry of λ Bootis stars
Paunzen, E.; Reegen, P.
We performed a homogeneous analysis of the available Hipparcos epoch photometry for all members of the LB group. Besides the known δ Scuti like pulsation frequencies, we searched for eclipses due to binarity or rotational induced variability. The already known frequencies of HD 15165 are confirmed with an additional lower single frequency, which m…
Solar-like stars as seen by CoRoT
Auvergne, M.; Baudin, F.; Michel, E. +7 more
For more than a year, photometric high-quality data have been achieved from the CoRoT (COnvection ROtation and Planetary Transits; Baglin et al. 2006, Michel et al. 2008) min- isatellite developed by the French space agency (CNES) in collaboration with the Science Program of ESA, Austria, Belgium, Brazil Germany and Spain. The power spectrum of 4 …
Extracting oscillation frequencies from sparse spectra: Fourier analysis
Jerzykiewicz, M.
I begin by explaining the properties of spectral windows of time-series data. Emphasis is on data obtained at a single geographic longitude, but ground-based multi-longitude cam- paigns and space missions such as MOST and Hipparcos are not entirely neglected. In the second section, I consider the Fourier transform of time-series data and the proce…