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 A97

Ämneskategorier

Astronomi, astrofysik och kosmologi

Datorseende och robotik (autonoma system)

Medicinsk bildbehandling

Infrastruktur

Onsala rymdobservatorium

DOI

10.1051/0004-6361/201731068

Mer information

Senast uppdaterat

2018-11-27