Planets, candidates, and binaries from the CoRoT/Exoplanet programme: The CoRoT transit catalogue
Artikel i vetenskaplig tidskrift, 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.
Space vehicles: Instruments
Techniques: Photometric
Binaries: Eclipsing
Methods: Data analysis
Författare
M. Deleuil
Laboratoire d'Astrophysique de Marseille
S. Aigrain
University of Oxford
C. Moutou
Laboratoire d'Astrophysique de Marseille
J. Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
F. Bouchy
Laboratoire d'Astrophysique de Marseille
Universite de Geneve
H. Deeg
Instituto Astrofisico de Canarias
Universidad de la Laguna
J. M. Almenara
Laboratoire d'Astrophysique de Marseille
Universite de Geneve
G. Hebrard
Institut d 'Astrophysique de Paris
Observatoire de Haute-Provence
A. Santerne
Laboratoire d'Astrophysique de Marseille
R. Alonso
Universidad de la Laguna
A. S. Bonomo
Strada Osservatorio 20
P. Bordé
Laboratoire d'Astrophysique de Bordeaux
Szilard Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
R. F. Diaz
Universidad de Buenos Aires
Facultad de Ciencias Exactas y Naturales
Anders Erikson
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Malcolm Fridlund
Universiteit Leiden
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik
D. Gandolfi
Landessternwarte Heidelberg-Königstuhl
Universita degli Studi di Torino
E. W. Guenther
Thüringer Landessternwarte Tautenburg
T. Guillot
Laboratoire Joseph-Louis Lagrange
P. Guterman
Laboratoire d'Astrophysique de Marseille
S. Grziwa
Universität zu Köln
A. Hatzes
Thüringer Landessternwarte Tautenburg
A. Léger
Université Paris-Sud
T. Mazeh
Tel Aviv University
A. Ofir
Weizmann Institute of Science
Georg-August-Universität Göttingen
M. Ollivier
Université Paris-Sud
Martin Pätzold
Universität zu Köln
H. Parviainen
Universidad de la Laguna
Instituto Astrofisico de Canarias
H. Rauer
Technische Universität Berlin
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
D. Rouan
LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique
J. Schneider
Université Paris Diderot
R. Titz-Weider
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
B. Tingley
Aarhus Universitet
J. Weingrill
Institut fur Weltraumforschung
Astrophysikalisches Institut Potsdam
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 619 A97Ämneskategorier
Astronomi, astrofysik och kosmologi
Datorseende och robotik (autonoma system)
Medicinsk bildbehandling
Infrastruktur
Onsala rymdobservatorium
DOI
10.1051/0004-6361/201731068