NGTS-1b: a hot Jupiter transiting an M-dwarf

被引：77

作者：

Bayliss, Daniel ^{[1
]}

Gillen, Edward ^{[2
]}

Eigmueller, Philipp ^{[3
]}

McCormac, James ^{[4
,5
]}

Alexander, Richard D. ^{[6
]}

Armstrong, David J. ^{[4
,5
]}

Booth, Rachel S. ^{[7
]}

Bouchy, Francois ^{[1
]}

Burleigh, Matthew R. ^{[6
]}

Cabrera, Juan ^{[3
]}

Casewell, Sarah L. ^{[6
]}

Chaushev, Alexander ^{[6
]}

Chazelas, Bruno ^{[1
]}

Csizmadia, Szilard ^{[3
]}

Erikson, Anders ^{[3
]}

Faedi, Francesca ^{[4
]}

Foxell, Emma ^{[4
]}

Gansicke, Boris T. ^{[4
,5
]}

Goad, Michael R. ^{[6
]}

Grange, Andrew ^{[6
]}

Guenther, Maximilian N. ^{[2
]}

Hodgkin, Simon T. ^{[8
]}

Jackman, James ^{[4
]}

Jenkins, James S. ^{[9
,10
]}

Lambert, Gregory ^{[2
]}

Louden, Tom ^{[4
,5
]}

Metrailler, Lionel ^{[1
]}

Moyano, Maximiliano ^{[11
]}

Pollacco, Don ^{[4
,5
]}

Poppenhaeger, Katja ^{[7
]}

Queloz, Didier ^{[2
]}

Raddi, Roberto ^{[4
]}

Rauer, Heike ^{[3
,12
]}

Raynard, Liam ^{[6
]}

Smith, Alexis M. S. ^{[3
]}

Soto, Maritza ^{[9
]}

Thompson, Andrew P. G. ^{[7
]}

Titz-Weider, Ruth ^{[3
]}

Udry, Stephane ^{[1
]}

Walker, Simon. R. ^{[4
]}

Watson, Christopher A. ^{[7
]}

West, Richard G. ^{[4
,5
]}

Wheatley, Peter J. ^{[4
,5
]}

机构：

[1] Univ Geneva, Observ Geneva, 51 Ch Maillettes, CH-1290 Sauverny, Switzerland

[2] Cavendish Lab, Astrophys Grp, JJ Thomson Ave, Cambridge CB3 0HE, England

[3] German Aerosp Ctr, Inst Planetary Res, Rutherfordstr 2, D-12489 Berlin, Germany

[4] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[5] Univ Warwick, Ctr Exoplanets & Habitabil, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[6] Univ Leicester, Leicester Inst Space & Earth Observat, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[7] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland

[8] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[9] Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile

[10] CATA, Casilla 36-D, Santiago, Chile

[11] Univ Catolica Norte, Casa Cent, Inst Astron, Angamos 0610, Antofagasta, Chile

[12] TU Berlin, Ctr Astron & Astrophys, Hardenbergstr 36, D-10623 Berlin, Germany

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 475卷 / 04期

基金：

欧洲研究理事会; 瑞士国家科学基金会; 英国科学技术设施理事会;

关键词：

techniques: photometric; techniques: radial velocities; stars: individual: NGTS; 1-planetary systems; ALL-SKY; PLANETS; SEARCH; FREQUENCY; STARS; CANDIDATE; PROGRAM; ORBIT;

D O I：

10.1093/mnras/stx2778

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：4467 / 4475

页数：9

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