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Bayliss, Daniel; Gillen, Edward; Eigmüller, Philipp; McCormac, James; Alexander, Richard D; Armstrong, David J; Booth, Rachel S; Bouchy, François; Burleigh, Matthew R; Cabrera, Juan; Casewell, Sarah L; Chaushev, Alexander; Chazelas, Bruno; Csizmadia, Szilard; Erikson, Anders; Faedi, Francesca; Foxell, Emma; Gänsicke, Boris T; Goad, Michael R; Grange, Andrew; Günther, Maximilian N; Hodgkin, Simon T; Jackman, James; Jenkins, James S; Lambert, Gregory; Louden, Tom; Metrailler, Lionel; Moyano, Maximiliano; Pollacco, Don; Poppenhaeger, Katja; Queloz, Didier; Raddi, Roberto; Rauer, Heike; Raynard, Liam; Smith, Alexis M S; Soto, Maritza; Thompson, Andrew P G; Titz-Weider, Ruth; Udry, Stéphane; Walker, Simon R; Watson, Christopher A; West, Richard G; Wheatley, Peter J
Monthly notices of the Royal Astronomical Society, 04/2018, Letnik: 475, Številka: 4Journal Article
Abstract We present the discovery of NGTS-1b, a hot Jupiter transiting an early M-dwarf host (Teff,* = $3916\, ^{+71}_{-63}$ K) in a P = 2.647 d orbit discovered as part of the Next Generation Transit Survey (NGTS). The planet has a mass of $0.812\, ^{+0.066}_{-0.075}$ MJ, making it the most massive planet ever discovered transiting an M-dwarf. The radius of the planet is $1.33\, ^{+0.61}_{-0.33}$ RJ. Since the transit is grazing, we determine this radius by modelling the data and placing a prior on the density from the population of known gas giant planets. NGTS-1b is the third transiting giant planet found around an M-dwarf, reinforcing the notion that close-in gas giants can form and migrate similar to the known population of hot Jupiters around solar-type stars. The host star shows no signs of activity, and the kinematics hint at the star being from the thick disc population. With a deep (2.5 per cent) transit around a K = 11.9 host, NGTS-1b will be a strong candidate to probe giant planet composition around M-dwarfs via James Webb Space Telescope transmission spectroscopy.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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