@article{b607c0be55ed44118bacc50f3363b143,
title = "NGTS 15b, 16b, 17b, and 18b: four hot Jupiters from the Next-Generation Transit Survey",
abstract = "We report the discovery of four new hot Jupiters with the Next Generation Transit Survey (NGTS). NGTS-15b, NGTS-16b, NGTS-17b, and NGTS-18b are short-period (P < 5d) planets orbiting G-type main sequence stars, with radii and masses between 1.10–1.30 RJ and 0.41–0.76 MJ. By considering the host star luminosities and the planets{\textquoteright} small orbital separations (0.039–0.052 AU), we find that all four hot Jupiters are highly irradiated and therefore occupy a region of parameter space in which planetary inflation mechanisms become effective. Comparison with statistical studies and a consideration of the planets{\textquoteright} high incident fluxes reveals that NGTS-16b, NGTS-17b, and NGTS-18b are indeed likely inflated, although some disparities arise upon analysis with current Bayesian inflationary models. However, the underlying relationships which govern radius inflation remain poorly understood. We postulate that the inclusion of additional hyperparameters to describe latent factors such as heavy element fraction, as well as the addition of an updated catalogue of hot Jupiters, would refine inflationary models, thus furthering our understanding of the physical processes which give rise to inflated planets.",
keywords = "Astronomy and Astrophysics, Space and Planetary Science",
author = "Tilbrook, {Rosanna H.} and Burleigh, {Matthew R.} and Costes, {Jean C.} and Samuel Gill and Nielsen, {Louise D.} and Vines, {Jos{\'e} I.} and Didier Queloz and Hodgkin, {Simon T.} and Worters, {Hannah L.} and Goad, {Michael R.} and Acton, {Jack S.} and Henderson, {Beth A.} and Armstrong, {David J.} and Anderson, {David R.} and Daniel Bayliss and Fran{\c c}ois Bouchy and Briegal, {Joshua T.} and Bryant, {Edward M.} and Casewell, {Sarah L.} and Alexander Chaushev and Cooke, {Benjamin F.} and Philipp Eigm{\"u}ller and Edward Gillen and G{\"u}nther, {Maximilian N.} and Aleisha Hogan and Jenkins, {James S.} and Monika Lendl and James McCormac and Maximiliano Moyano and Liam Raynard and Smith, {Alexis M. S.} and St{\'e}phane Udry and Watson, {Christopher A.} and West, {Richard G.} and Wheatley, {Peter J.} and Hannes Breytenbach and Sefako, {Ramotholo R.} and Thomas, {Jessymol K.} and Alves, {Douglas R.}",
year = "2021",
month = jul,
doi = "10.1093/mnras/stab815",
language = "English",
volume = "504",
pages = "6018–6032",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "4",
}