SIMBAD references

2020MNRAS.497.3790L - Mon. Not. R. Astron. Soc., 497, 3790-3808 (2020/September-3)

Global analysis of the TRAPPIST Ultra-Cool Dwarf Transit Survey.

LIENHARD F., QUELOZ D., GILLON M., BURDANOV A., DELREZ L., DUCROT E., HANDLEY W., JEHIN E., MURRAY C.A., TRIAUD A.H.M.J., GILLEN E., MORTIER A. and RACKHAM B.V.

Abstract (from CDS):

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 and the orbital period between 1.4 and 1.8 d.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): atmospheric effects - techniques: photometric - planets and satellites: detection

Simbad objects: 45

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2021.06.13-03:50:20

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