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Title: NGTS-2b: an inflated hot-Jupiter transiting a bright F-dwarf
Authors: Raynard, L
Goad, MR
Gillen, E
Nielsen, LD
Watson, CA
Thompson, APG
McCormac, J
Bayliss, D
Soto, M
Csizmadia, S
Chaushev, A
Burleigh, MR
Alexander, R
Armstrong, DJ
Bouchy, F
Briegal, JT
Cabrera, J
Casewell, SL
Chazelas, B
Cooke, BF
Eigmueller, P
Erikson, A
Gansicke, BT
Grange, A
Guenther, MN
Hodgkin, ST
Hooton, MJ
Jenkins, JS
Lambert, G
Louden, T
Metrailler, L
Moyano, M
Pollacco, D
Poppenhaeger, K
Queloz, D
Raddi, R
Rauer, H
Read, AM
Smalley, B
Smith, AMS
Turner, O
Udry, S
Walker, SR
West, RG
Wheatley, PJ
First Published: 20-Sep-2018
Publisher: Oxford University Press (OUP), Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, 2018, 481 (4), pp. 4960-4970 (11)
Abstract: We report the discovery of NGTS-2b, an inflated hot-Jupiter transiting a bright F5V star (2MASS J14202949 − 3112074; Teff = 6478+94 −89 K), discovered as part of the Next Generation Transit Survey (NGTS). The planet is in a P = 4.51 d orbit with mass 0.74+0.13 −0.12 MJ, radius 1.595+0.047 −0.045 RJ, and density 0.226+0.040 −0.038 g cm−3; therefore one of the lowest density exoplanets currently known. With a relatively deep 1.0 per cent transit around a bright V = 10.96 host star, NGTS-2b is a prime target for probing giant planet composition via atmospheric transmission spectroscopy. The rapid rotation (v sin i = 15.2 ± 0.8 km s−1) also makes this system an excellent candidate for Rossiter–McLaughlin follow-up observations, to measure the sky-projected stellar obliquity. NGTS-2b was confirmed without the need for follow-up photometry, due to the high precision of the NGTS photometry.
DOI Link: 10.1093/mnras/sty2581
ISSN: 0035-8711
eISSN: 1365-2966
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2018, Oxford University Press (OUP), Royal Astronomical Society. Deposited with reference to the publisher’s open access archiving policy. (
Description: Supplementary data are available at MNRAS online. Table 1. NGTS photometry for NGTS-2.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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