Search Publications
Rotation in NGC 2264: a study based on CoRoT photometric observations
Bouvier, J.; Micela, G.; Favata, F. +2 more
Rotation is one of the key stellar parameters which undergo substantial evolution during the stellar lifetime, in particular during the early stages. Stellar rotational periods can be determined on the basis of the periodic modulation of starlight produced by non-uniformities on the surface of the stars, due to manifestation of stellar activity. W…
CoRoT: Harvest of the exoplanet program
Guillot, Tristan; Cabrera, Juan; Deeg, Hans J. +6 more
One of the objectives of the CoRoT mission is the search for transiting extrasolar planets using high-precision photometry, and the accurate characterization of their fundamental parameters. The CoRoT satellite consecutively observes crowded stellar fields since February 2007, in high-cadence precise photometry; periodic eclipses are detected and …
An in-depth study of HD 174966 with CoRoT photometry and HARPS spectroscopy. Large separation as a new observable for δ Scuti stars
Auvergne, M.; Amado, P. J.; Baudin, F. +18 more
Aims: The aim of this work was to use a multi-approach technique to derive the most accurate values possible of the physical parameters of the δ Sct star HD 174966, which was observed with the CoRoT satellite. In addition, we searched for a periodic pattern in the frequency spectra with the goal of using it to determine the mean density of th…
CoRoT 102918586: a γ Doradus pulsator in a short-period eccentric eclipsing binary
Gandolfi, D.; Rainer, M.; Montalbán, J. +2 more
Pulsating stars in eclipsing binary systems are powerful tools to test stellar models. Binarity enables us to constrain the pulsating component's physical parameters and this knowledge drastically improves the input physics for asteroseismic studies. The study of stellar oscillations then allows us to improve our understanding of stellar interiors…
Overview of semi-sinusoidal stellar variability with the CoRoT satellite
Baglin, A.; Catelan, M.; Janot-Pacheco, E. +13 more
Context. To date, the CoRoT space mission has produced more than 124 471 light curves. Classifying these curves in terms of unambiguous variability behavior is mandatory for obtaining an unbiased statistical view on their controlling root-causes.
Aims: The present study provides an overview of semi-sinusoidal light curves observed by the CoRo…
γ Doradus pulsation in two pre-main sequence stars discovered by CoRoT
Chaintreuil, S.; Ryabchikova, T.; Fossati, L. +5 more
Context. Pulsations in pre-main sequence stars have been discovered several times within the last years. But nearly all of these pulsators are of δ Scuti-type. γ Doradus-type pulsation in young stars has been predicted by theory, but lack observational evidence.
Aims: We present the investigation of variability caused by rotation and (γ Dorad…
CoRoT 101186644: A transiting low-mass dense M-dwarf on an eccentric 20.7-day period orbit around a late F-star. Discovered in the CoRoT lightcurves
Mazeh, T.; Alonso, R.; Bouchy, F. +10 more
We present the study of the CoRoT transiting planet candidate 101186644, also named LRc01_E1_4780. Analysis of the CoRoT lightcurve and the HARPS spectroscopic follow-up observations of this faint (mV = 16) candidate revealed an eclipsing binary composed of a late F-type primary (Teff = 6090 ± 200 K) and a low-mass, dense lat…
Secondary eclipses in the CoRoT light curves. A homogeneous search based on Bayesian model selection
Deeg, H. J.; Parviainen, H.; Belmonte, J. A.
Aims: We aim to identify and characterize secondary eclipses in the original light curves of all published CoRoT planets using uniform detection and evaluation critetia.
Methods: Our analysis is based on a Bayesian model selection between two competing models: one with and one without an eclipse signal. The search is carried out by mappi…
The Future of the Sun: An Evolved Solar Twin Revealed by CoRoT
Porto de Mello, G. F.; Castro, M.; da Costa, J. S. +3 more
The question of whether the Sun is peculiar within the class of solar-type stars has been the subject of active investigation over the past three decades. Although several solar twins have been found with stellar parameters similar to those of the Sun (albeit in a range of Li abundances and with somewhat different compositions), their rotation per…
New Suns in the Cosmos?
Catelan, M.; Ferreira Lopes, C. E.; De Medeiros, J. R. +5 more
The present work reports on the discovery of three stars that we have identified to be rotating Sun-like stars, based on rotational modulation signatures inferred from light curves from the CoRoT mission's Public Archives. In our analysis, we performed an initial selection based on the rotation period and position in the period-T eff di…