NGTS-12b：一颗在7.53天轨道上运行的亚土星质量凌星系外行星
地球与行星天体物理
2020-10-07 v1
摘要
我们报告了下一代凌星巡天（NGTS）发现的凌星系外行星NGTS-12b。其宿主恒星NGTS-12是一颗V=12.38等的恒星，有效温度T= K。NGTS-12b以周期天轨道运行，是迄今主NGTS巡天发现周期最长的行星。我们利用从TESS全帧图像中提取的数据验证了NGTS凌星信号，并结合HARPS和FEROS的视向速度测量，确定NGTS-12b的质量为 M、半径为 R。当考虑恒星性质时，NGTS-12b位于海王星沙漠边缘，凸显了研究沙漠时同时考虑行星与恒星的重要性。NGTS-12b的长周期及其仅 g cm的低密度，使其成为通过透射光谱进行大气表征的有吸引力的目标，其透射光谱度量值为89.4。
引用
@article{arxiv.2009.10620,
title = {NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit},
author = {Edward M. Bryant and Daniel Bayliss and Louise D. Nielsen and Dimitri Veras and Jack S. Acton and David R. Anderson and David J. Armstrong and Francois Bouchy and Joshua T. Briegal and Matthew R. Burleigh and Juan Cabrera and Sarah L. Casewell and Alexander Chaushev and Benjamin F. Cooke and Szilard Csizmadia and Philipp Eigmuller and Anders Erikson and Samuel Gill and Edward Gillen and Michael R. Goad and Nolan Grieves and Maximilian N. Gunther and Beth Henderson and Aleisha Hogan and James S. Jenkins and Monika Lendl and James McCormac and Maximiliano Moyano and Didier Queloz and Heike Rauer and Liam Raynard and Alexis M. S. Smith and Rosanna H. Tilbrook and Stephane Udry and Jose I. Vines and Christopher A. Watson and Richard G. West and Peter J. Wheatley},
journal= {arXiv preprint arXiv:2009.10620},
year = {2020}
}
备注
Accepted for publication in MNRAS, 11 pages