NGTS-7Ab: An ultra-short period brown dwarf transiting a tidally-locked and active M dwarf

This research is based on data collected under the NGTS project at the ESO La Silla Paranal Observatory. The NGTS facility is funded by a consortium of institutes consisting of the University of Warwick, the University of Leicester, Queen’s University Belfast, the University of Geneva, the Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR; under the ‘Großinvestition GI-NGTS’), and the University of Cambridge, together with the UK Science and Technology Facilities Council (STFC; project reference ST/M001962/1 and ST/S002642/1). JAGJ was supported by STFC PhD studentship 176309. PJW, SG, TL, BTG, DP, and RGW were supported by STFC consolidated grant ST/P000495/1. SLC was supported by an STFC Ernest Rutherford fellowship. MNG acknowledges support from MIT’s Kavli Institute as a Torres Postdoctoral Fellow. JSJ acknowledges support by Fondecyt grant 1161218 and partial support by CATA-Basal (PB06, CONICYT). CAW acknowledges support from Science and Technology Facilities Council grant ST/P000312/1. EG gratefully acknowledges support from the David and Claudia Harding Foundation in the form of a Winton Exoplanet Fellowship.