NGTS-10b: the shortest period hot Jupiter yet discovered. Issue 1 (20th February 2020)

• Record Type: Journal Article
• Authors: McCormac, James; Gillen, Edward; Jackman, James A G; Brown, David J A; Bayliss, Daniel; Wheatley, Peter J; Anderson, David R; Armstrong, David J; Bouchy, François; Briegal, Joshua T; Burleigh, Matthew R; Cabrera, Juan; Casewell, Sarah L; Chaushev, Alexander; Chazelas, Bruno; Chote, Paul; Cooke, Benjamin F; Costes, Jean C; Csizmadia, Szilárd; Eigmüller, Philipp; Erikson, Anders; Foxell, Emma; Gänsicke, Boris T; Goad, Michael R; Günther, Maximilian N; Hodgkin, Simon T; Hooton, Matthew J; Jenkins, James S; Lambert, Gregory; Lendl, Monika; Longstaff, Emma; Louden, Tom; Moyano, Maximiliano; Nielsen, Louise D; Pollacco, Don; Queloz, Didier; Rauer, Heike; Raynard, Liam; Smith, Alexis M S; Smalley, Barry; Soto, Maritza; Turner, Oliver; Udry, Stéphane; Vines, Jose I; Walker, Simon R; Watson, Christopher A; West, Richard G;
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 493:Issue 1(2020)
• Page Start: 126
• Page End: 140
• Publication Date: 2020-02-20
• Subjects: techniques: photometric -- stars: individual: NGTS-10 -- planetary systems; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/staa115
• Languages: English
• ISSNs: 0035-8711

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 $2.162\, ^{+0.092}_{-0.107}$ M J and $1.205\, ^{+0.117}_{-0.083}$ R J 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 ( T eff = 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 × 10 7 .