Planets, candidates, and binaries from the CoRoT/Exoplanet programme: The CoRoT transit catalogue
Journal article, 2018
The CoRoT space mission observed 163 665 stars over 26 stellar fields in the faint star channel. The exoplanet teams detected a total of 4123 transit-like features in the 177 454 light curves. We present the complete re-analysis of all these detections carried out with the same softwares so that to ensure their homogeneous analysis. Although the vetting process involves some human evaluation, it also involves a simple binary flag system over basic tests: Detection significance, presence of a secondary, difference between odd and even depths, colour dependence, V-shape transit, and duration of the transit. We also gathered the information from the large accompanying ground-based programme carried out on the planet candidates and checked how useful the flag system could have been at the vetting stage of the candidates. From the initial list of transit-like features, we identified and separated 824 false alarms of various kind, 2269 eclipsing binaries among which 616 are contact binaries and 1653 are detached ones, 37 planets and brown dwarfs, and 557 planet candidates. We provide the catalogue of all these transit-like features, including false alarms. For the planet candidates, the catalogue gives not only their transit parameters but also the products of their light curve modelling: Reduced radius, reduced semi-major axis, and impact parameter, together with a summary of the outcome of follow-up observations when carried out and their current status. For the detached eclipsing binaries, the catalogue provides, in addition to their transit parameters, a simple visual classification. Among the planet candidates whose nature remains unresolved, we estimate that eight (within an error of three) planets are still to be identified. After correcting for geometric and sensitivity biases, we derived planet and brown dwarf occurrences and confirm disagreements with Kepler estimates, as previously reported by other authors from the analysis of the first runs: Small-size planets with orbital period less than ten days are underabundant by a factor of three in the CoRoT fields whereas giant planets are overabundant by a factor of two. These preliminary results would however deserve further investigations using the recently released CoRoT light curves that are corrected of the various instrumental effects and a homogeneous analysis of the stellar populations observed by the two missions.
Methods: Data analysis
Binaries: Eclipsing
Space vehicles: Instruments
Techniques: Photometric
Author
M. Deleuil
Laboratoire d'Astrophysique de Marseille
S. Aigrain
University of Oxford
C. Moutou
Laboratoire d'Astrophysique de Marseille
J. Cabrera
German Aerospace Center (DLR)
F. Bouchy
University of Geneva
Laboratoire d'Astrophysique de Marseille
H. Deeg
University of La Laguna
Instituto de Astrofísica de Canarias
J. M. Almenara
Laboratoire d'Astrophysique de Marseille
University of Geneva
G. Hebrard
Observatoire de Haute-Provence
Institut d 'Astrophysique de Paris
A. Santerne
Laboratoire d'Astrophysique de Marseille
R. Alonso
University of La Laguna
A. S. Bonomo
Strada Osservatorio 20
P. Bordé
Laboratoire d'Astrophysique de Bordeaux
Szilard Csizmadia
German Aerospace Center (DLR)
R. F. Diaz
Universidad de Buenos Aires
Facultad de Ciencias Exactas y Naturales
Anders Erikson
German Aerospace Center (DLR)
Malcolm Fridlund
Leiden University
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
D. Gandolfi
University of Turin
Heidelberg-Königstuhl State Observatory
E. W. Guenther
Thüringer Landessternwarte Tautenburg
T. Guillot
Laboratoire Joseph-Louis Lagrange
P. Guterman
Laboratoire d'Astrophysique de Marseille
S. Grziwa
University of Cologne
A. Hatzes
Thüringer Landessternwarte Tautenburg
A. Léger
University of Paris-Sud
T. Mazeh
Tel Aviv University
A. Ofir
Weizmann Institute of Science
University of Göttingen
M. Ollivier
University of Paris-Sud
Martin Pätzold
University of Cologne
H. Parviainen
Instituto de Astrofísica de Canarias
University of La Laguna
H. Rauer
Technische Universität Berlin
German Aerospace Center (DLR)
D. Rouan
LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique
J. Schneider
Paris Diderot University
R. Titz-Weider
German Aerospace Center (DLR)
B. Tingley
Aarhus University
J. Weingrill
Institut fur Weltraumforschung
Leibniz Institute for Astrophysics Potsdam
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 619 A97Subject Categories
Astronomy, Astrophysics and Cosmology
Computer Vision and Robotics (Autonomous Systems)
Medical Image Processing
Infrastructure
Onsala Space Observatory
DOI
10.1051/0004-6361/201731068