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CoRoT Measures Solar-Like Oscillations and Granulation in Stars Hotter Than the Sun
Neiner, Coralie; Baudin, Frédéric; Aerts, Conny +41 more
Oscillations of the Sun have been used to understand its interior structure. The extension of similar studies to more distant stars has raised many difficulties despite the strong efforts of the international community over the past decades. The CoRoT (Convection Rotation and Planetary Transits) satellite, launched in December 2006, has now measur…
CoRoT sounds the stars: p-mode parameters of Sun-like oscillations on HD 49933
Auvergne, M.; Baudin, F.; Jiménez-Reyes, S. J. +19 more
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 on the F5 V star HD 49933. The data reveal a rich spectrum of overtones of low-degree p modes.
Aims: Our aim was to extract robust estimates of t…
Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an active G star
Mazeh, T.; Aigrain, S.; Alonso, R. +40 more
Context: The CoRoT mission, a pioneer in exoplanet searches from space, has completed its first 150 days of continuous observations of ~12 000 stars in the galactic plane. An analysis of the raw data identifies the most promising candidates and triggers the ground-based follow-up.
Aims: We report on the discovery of the transiting planet CoRoT…
Transiting exoplanets from the CoRoT space mission . VI. CoRoT-Exo-3b: the first secure inhabitant of the brown-dwarf desert
Mazeh, T.; Aigrain, S.; Zucker, S. +39 more
Context: The CoRoT space mission routinely provides high-precision photometric measurements of thousands of stars that have been continuously observed for months.
Aims: The discovery and characterization of the first very massive transiting planetary companion with a short orbital period is reported.
Methods: A series of 34 transits was de…
Transiting exoplanets from the CoRoT space mission. IV. CoRoT-Exo-4b: a transiting planet in a 9.2 day synchronous orbit
Mazeh, T.; Aigrain, S.; Zucker, S. +32 more
CoRoT, the first space-based transit search, provides ultra-high-precision light curves with continuous time-sampling over periods of up to 5 months. This allows the detection of transiting planets with relatively long periods, and the simultaneous study of the host star's photometric variability. In this Letter, we report the discovery of the tra…
Transiting exoplanets from the CoRoT space mission. V. CoRoT-Exo-4b: stellar and planetary parameters
Mazeh, T.; Aigrain, S.; Alonso, R. +42 more
Aims: The CoRoT satellite has announced its fourth transiting planet (Aigrain et al. 2008, A&A, 488, L43) with space photometry. We describe and analyse complementary observations of this system performed to establish the planetary nature of the transiting body and to estimate the fundamental parameters of the planet and its parent star.
M…
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.
Radiation effects on space-based stellar photometry: theoretical models and empirical results for CoRoT Space Telescope
Auvergne, M.; Rolland, G.; Pinheiro da Silva, L. +1 more
Convection, Rotation and planetary Transits (CoRoT) is a space mission dedicated to stellar seismology and the search for extrasolar planets. Both scientific programs are based on very high precision photometry and require long, uninterrupted observations. The instrument is based on an afocal telescope and a wide-field camera, consisting of four E…
Correcting for background changes in CoRoT exoplanet data
Auvergne, M.; Costa, J. E. S.; Samadi, R. +4 more
Context: The CoRoT satellite is a highly accurate photometer with 2 channels respectively optimised for asteroseismology and exoplanet finding. The design includes an effective straylight rejection system, however residual straylight reaches the detectors.
Aims: We test four different background models in order to apply the best possible backg…
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 …