McCormac, J, Gillen, E, Jackman, JAG, Brown, DJA, Bayliss, D, Wheatley, PJ, West, RG, Anderson, DR, Armstrong, DJ, Bouchy, F, Briegal, JT, Burleigh, MR, Cabrera, J, Casewell, SL, Chaushev, A, Chazelas, B, Chote, P, Cooke, BF, Costes, JC, Csizmadia, S, Eigmuller, P, Erikson, A, Foxell, E, Gaensicke, BT, Goad, MR, Gunther, MN, Hodgkin, ST, Hooton, MJ, Jenkins, JS, Lambert, G, Lendl, M, Longstaff, E, Louden, T, Moyano, M, Nielsen, LD, Pollacco, D, Queloz, D, Rauer, H, Raynard, L, Smith, AMS, Smalley, B, Soto, M, Turner, O, Udry, S, Vines, JI, Walker, SR and Watson, CA (2019) NGTS-10b: The shortest period hot Jupiter yet discovered. arXiv.

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We report the discovery of a new ultra-short period 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$_{\rm J}$ and $1.205\,^{+0.117}_{-0.083}$ R$_{\rm J}$ and orbits its host star with a period of $0.7668944\pm0.0000003$ days, making it the shortest period hot Jupiter yet discovered. The host is a $10.4\pm2.5$ Gyr old K5V star ($T_\mathrm{eff}$=$4400\pm100$\,K) of Solar metallicity ([Fe/H] = $-0.02\pm0.12$\,dex) showing moderate signs of stellar activity. NGTS-10b joins a short list of ultra-short period Jupiters that are prime candidates for the study of star-planet tidal interactions. NGTS-10b orbits its host at just $1.46\pm0.18$ Roche radii, and we calculate a median remaining inspiral time of $38$\,Myr and a potentially measurable transit time shift of $7$\,seconds over the coming decade, assuming a stellar tidal quality factor $Q'_{\rm s}=2\times10^{7}$.

Item Type: Article
Subjects: ?? astro-ph.EP ??
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 04 Oct 2019 15:40
Last Modified: 04 Oct 2019 15:40

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