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The CoRoT satellite in flight: description and performance
Guterman, P.; Auvergne, M.; Jorda, L. +107 more
Context: CoRoT is a space telescope dedicated to stellar seismology and the search for extrasolar planets. The mission is led by the CNES in association with French laboratories and has a large international participation. The European Space Agency (ESA), Austria, Belgium, and Germany contribute to the payload, and Spain and Brazil contribute to t…
Transiting exoplanets from the CoRoT space mission. VIII. CoRoT-7b: the first super-Earth with measured radius
Mazeh, T.; Guterman, P.; Aigrain, S. +158 more
Aims: We report the discovery of very shallow (Δ F/F ≈ 3.4× 10-4), periodic dips in the light curve of an active V = 11.7 G9V star observed by the CoRoT satellite, which we interpret as caused by a transiting companion. We describe the 3-colour CoRoT data and complementary ground-based observations that support the planetary nature of t…
Characteristics of solar-like oscillations in red giants observed in the CoRoT exoplanet field
Baudin, F.; Hatzes, A. P.; Baglin, A. +6 more
Context: Observations during the first long run (~150 days) in the exo-planet field of CoRoT increase the number of G-K giant stars for which solar-like oscillations are observed by a factor of 100. This opens the possibility to study the characteristics of their oscillations in a statistical sense.
Aims: We aim to understand the statistical d…
Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in a young Sun-like star
Aigrain, S.; Alonso, R.; Auvergne, M. +18 more
Context: The space experiment CoRoT has recently detected transits by a hot Jupiter across the disc of an active G7V star (CoRoT-Exo-2a) that can be considered as a good proxy for the Sun at an age of approximately 0.5 Gyr.
Aims: We present a spot modelling of the optical variability of the star during 142 days of uninterrupted observations pe…
HD 50844: a new look at δ Scuti stars from CoRoT space photometry
Auvergne, M.; Amado, P. J.; Baudin, F. +21 more
Context:
Aims: This work presents the results obtained by CoRoT on HD 50844, the only δ Sct star observed in the CoRoT initial run (57.6 d). The aim of these CoRoT observations was to investigate and characterize for the first time the pulsational behaviour of a δ Sct star, when observed at a level of precision and with a much better duty cycl…
Evidence for nonlinear resonant mode coupling in the β Cephei star HD 180642 (V1449 Aquilae) from CoRoT photometry
Auvergne, M.; Michel, E.; Uytterhoeven, K. +8 more
Context: We present the CoRoT light curve of the β Cep star HD 180642, assembled during the first long run of the space mission, as well as archival single-band photometry.
Aims: Our goal is to analyse the detailed behaviour present in the light curve and interpret it in terms of excited-mode frequencies.
Methods: After describing the nois…
The B0.5IVe CoRoT target HD 49330. I. Photometric analysis from CoRoT data
Auvergne, M.; Baudin, F.; Michel, E. +19 more
Context: 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.
Aims: We analyze the pulsational behavior of the early B0.5IVe star HD 49330 observed during the first CoRoT long run towards the Galactical anticenter (LRA…
Asteroseismic analysis of the CoRoT δ Scuti star HD 174936
Auvergne, M.; Amado, P. J.; Baudin, F. +13 more
We present an analysis of the δ-Scuti star HD 174936 (
A fresh look at the seismic spectrum of HD49933: analysis of 180 days of CoRoT photometry
Auvergne, M.; Baudin, F.; García, R. A. +18 more
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 timeserie…
Solar-like oscillations with low amplitude in the CoRoT target HD 181906
Auvergne, M.; Baudin, F.; Jiménez-Reyes, S. J. +23 more
Context: The F8 star HD 181906 (effective temperature ∼6300 K) was observed for 156 days by the CoRoT satellite during the first long run in the direction of the galactic centre. Analysis of the data reveals a spectrum of solar-like acoustic oscillations. However, the faintness of the target (mv = 7.65) means the signal-to-noise (S/N) i…