Published in
Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 1(493), p. 126-140, 2020
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NGTS-10b: the shortest period hot Jupiter yet discovered
,
James A. G. Jackman ,
David J. A. Brown ,
Daniel Bayliss ,
Peter J. Wheatley ,
David R. Anderson ,
David J. Armstrong ,
François Bouchy,
Joshua T. Briegal,
Matthew R. Burleigh,
Juan Cabrera ,
Sarah L. Casewell,
Alexander Chaushev,
Bruno Chazelas
and other authors.
Full text: Unavailable
Abstract
ABSTRACT We report the discovery of a new ultrashort period (USP) transiting hot Jupiter from the Next Generation Transit Survey (NGTS). NGTS-10b has a mass and radius of $2.162\, ^{+0.092}_{-0.107}$ MJ and $1.205\, ^{+0.117}_{-0.083}$ RJ and orbits its host star with a period of 0.7668944 ± 0.0000003 d, making it the shortest period hot Jupiter yet discovered. The host is a 10.4 ± 2.5 Gyr old K5V star (Teff = 4400 ± 100 K) of Solar metallicity ([Fe/H] = −0.02 ± 0.12 dex) showing moderate signs of stellar activity. NGTS-10b joins a short list of USP Jupiters that are prime candidates for the study of star–planet tidal interactions. NGTS-10b orbits its host at just 1.46 ± 0.18 Roche radii, and we calculate a median remaining inspiral time of 38 Myr and a potentially measurable orbital period decay of 7 s over the coming decade, assuming a stellar tidal quality factor $Q^{\prime }_{\rm s}$ =2 × 107.
