Reference : Global analysis of the TRAPPIST Ultra-Cool Dwarf Transit Survey
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/250850
Global analysis of the TRAPPIST Ultra-Cool Dwarf Transit Survey
English
Lienhard, F. [Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK]
Queloz, D. [Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK]
Gillon, Michaël mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Burdanov, A. [Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA]
Delrez, Laetitia mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Ducrot, Elsa mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Handley, W. [Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Murray, C. A. [Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK]
Triaud, A. H. M. J. [School of Physics & Astronomy, University of Birmingham, Edgbaston, Birmingham B152TT, UK]
Gillen, E. [Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK]
Mortier, Annelies [> >]
Rackham, B. V. [Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA)]
1-Jul-2020
Monthly Notices of the Royal Astronomical Society
Oxford University Press
497
3
3790
Yes
International
0035-8711
1365-2966
Oxford
United Kingdom
[en] atmospheric effects ; techniques: photometric ; planets and satellites: detection ; Astrophysics - Earth and Planetary Astrophysics ; Astrophysics - Instrumentation and Methods for Astrophysics ; Astrophysics - Solar and Stellar Astrophysics
[en] We conducted a global analysis of the TRAPPIST Ultra-Cool Dwarf Transit Survey - a prototype of the SPECULOOS transit search conducted with the TRAPPIST-South robotic telescope in Chile from 2011 to 2017 - to estimate the occurrence rate of close-in planets such as TRAPPIST-1b orbiting ultra-cool dwarfs. For this purpose, the photometric data of 40 nearby ultra-cool dwarfs were reanalysed in a self-consistent and fully automated manner starting from the raw images. The pipeline developed specifically for this task generates differential light curves, removes non-planetary photometric features and stellar variability, and searches for transits. It identifies the transits of TRAPPIST-1b and TRAPPIST-1c without any human intervention. To test the pipeline and the potential output of similar surveys, we injected planetary transits into the light curves on a star-by-star basis and tested whether the pipeline is able to detect them. The achieved photometric precision enables us to identify Earth-sized planets orbiting ultra-cool dwarfs as validated by the injection tests. Our planet-injection simulation further suggests a lower limit of 10 per cent on the occurrence rate of planets similar to TRAPPIST-1b with a radius between 1 and 1.3 R[SUB]⊕[/SUB] and the orbital period between 1.4 and 1.8 d.
Professionals
http://hdl.handle.net/2268/250850
10.1093/mnras/staa2054
https://ui.adsabs.harvard.edu/abs/2020MNRAS.497.3790L

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