期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 475, 期 4, 页码 4467-4475出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx2778
关键词
techniques: photometric; techniques: radial velocities; stars: individual: NGTS; 1-planetary systems
资金
- UK Science and Technology Facilities Council (STFC) [ST/M001962/1]
- Swiss National Science Foundation (SNSF)
- STFC [ST/L000733/1, ST/P000495/1, ST/N000757/1, ST/P000312/1, 1226157, 1490409]
- Fondecyt [1161218]
- CATA-Basal (CONICYT) [PB06]
- European Research Council (ERC) under the European Union's Horizon research and innovation programme [681601]
- European Research Council under the European Union's Seventh Framework Programme (FP)/ERC [320964]
- STFC [ST/M001962/1, ST/N000757/1, 1795021, ST/P000312/1, ST/P000495/1, ST/L000733/1, ST/L001306/1, ST/N001524/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/P000495/1, ST/P000312/1, ST/L000733/1, 1226157, 1795021, ST/N000757/1, ST/M001962/1] Funding Source: researchfish
We present the discovery of NGTS-1b, a hot Jupiter transiting an early M-dwarf host (T-eff,(*) = 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) M-J, making it the most massive planet ever discovered transiting an M-dwarf. The radius of the planet is 1.33(-0.33)(+0.61) R-J. 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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