NGTS-2b：一颗凌亮F型矮星膨胀热木星
地球与行星天体物理
2018-09-21 v2
摘要
我们报告发现NGTS-2b，一颗膨胀的热木星，它凌食一颗明亮的F5V恒星（2MASS J14202949-3112074；= K），该发现作为下一代凌星巡天（NGTS）的一部分。该行星位于周期P=4.51天的轨道上，质量 M、半径 R、密度 g cm；因此是迄今已知密度最低的系外行星之一。凭借在明亮V=10.96宿主星周围相对深的1.0%凌星，NGTS-2b是通过大气透射光谱探测巨行星组成的首要目标。其快速自转（i= km s）也使该系统成为Rossiter-McLaughlin后续观测以测量天球投影恒星倾角的极佳候选。由于NGTS测光的高精度，NGTS-2b无需后续测光即被确认。
引用
@article{arxiv.1805.10449,
title = {NGTS-2b: An inflated hot-Jupiter transiting a bright F-dwarf},
author = {Liam Raynard and Michael R. Goad and Edward Gillen and Louise D. Nielsen and Christopher A. Watson and Andrew P. G. Thompson and James McCormac and Daniel Bayliss and Maritza Soto and Szilard Csizmadia and Alexander Chaushev and Matthew R. Burleigh and Richard Alexander and David J. Armstrong and François Bouchy and Joshua T. Briegal and Juan Cabrera and Sarah L. Casewell and Bruno Chazelas and Benjamin F. Cooke and Philipp Eigmüller and Anders Erikson and Boris T. Gänsicke and Andrew Grange and Maximilian N. Günther and Simon T. Hodgkin and Matthew J. Hooton and James S. Jenkins and Gregory Lambert and Tom Louden and Lionel Metrailler and Maximiliano Moyano and Don Pollacco and Katja Poppenhaeger and Didier Queloz and Roberto Raddi and Heike Rauer and Andrew M. Read and Barry Smalley and Alexis M. S. Smith and Oliver Turner and Stéphane Udry and Simon R. Walker and Richard G. West and Peter J. Wheatley},
journal= {arXiv preprint arXiv:1805.10449},
year = {2018}
}
备注
12 pages, 8 figures, accepted for publication in MNRAS