NGTS-10b: the shortest period hot Jupiter yet discovered

Medientyp: E-Artikel
Titel: NGTS-10b: the shortest period hot Jupiter yet discovered
Beteiligte: 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; [...]
Erschienen: Oxford University Press (OUP), 2020
Erschienen in: Monthly Notices of the Royal Astronomical Society
Sprache: Englisch
DOI: 10.1093/mnras/staa115
ISSN: 0035-8711; 1365-2966
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Beschreibung: <jats:title>ABSTRACT</jats:title> <jats:p>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.</jats:p>
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