NGTS-10b: The shortest period hot Jupiter yet discovered
James McCormac, Edward Gillen, James A. G. Jackman, David J. A. Brown, Daniel Bayliss, Peter J. Wheatley, Richard G. West, David R. Anderson, David J. Armstrong… 展开作者
James McCormac, Edward Gillen, James A. G. Jackman, David J. A. Brown, Daniel Bayliss, Peter J. Wheatley, Richard G. West, David R. Anderson, David J. Armstrong, Francois Bouchy, Joshua T. Briegal, Matthew R. Burleigh, Juan Cabrera, Sarah L. Casewell, Alexander Chaushev, Bruno Chazelas, Paul Chote, Benjamin F. Cooke, Jean C. Costes, Szilard Csizmadia, Philipp Eigmuller, Anders Erikson, Emma Foxell, Boris T. Gaensicke, Michael R. Goad, Maximilian N. Gunther, Simon T. Hodgkin, Matthew J. Hooton, James S. Jenkins, Gregory Lambert, Monika Lendl, Emma Longstaff, Tom Louden, Maximiliano Moyano, Louise D. Nielsen, Don Pollacco, Didier Queloz, Heike Rauer, Liam Raynard, Alexis M. S. Smith, Barry Smalley, Maritza Soto, Oliver Turner, Stephane Udry, Jose I. Vines, Simon. R. Walker, Christopher A. Watson
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16 pages, 19 figures and 5 tables. Submitted 27 Sept 2019. Accepted 10 Jan 2020. Published 20 Feb 2020
We report the discovery of a new ultra-short period transiting hot Jupiter from the Next Generation Transit Survey (NGTS). NGTS-10b has a mass and radius of $2.162\,^{+0.092}_{-0.107}$ M$_{\rm J}$ and $1.205\,^{+0.117}_{-0.083}$ R$_{\rm J}$ and orbits its host star with a period of $0.7668944\pm0.0000003$ days, making it the shortest period hot Jupiter yet discovered. The host is a $10.4\pm2.5$ Gyr old K5V star ($T_\mathrm{eff}$=$4400\pm100$\,K) of Solar metallicity ([Fe/H] = $-0.02\pm0.12$\,dex) showing moderate signs of stellar activity. NGTS-10b joins a short list of ultra-short period Jupiters that are prime candidates for the study of star-planet tidal interactions. NGTS-10b orbits its host at just $1.46\pm0.18$ Roche radii, and we calculate a median remaining inspiral time of $38$\,Myr and a potentially measurable transit time shift of $7$\,seconds over the coming decade, assuming a stellar tidal quality factor $Q'_{\rm s}=2\times10^{7}$.
NGTS-2b: An inflated hot-Jupiter transiting a bright F-dwarf
我们报告NGTS-2b的发现,一个膨胀的热木星过境一个明亮的F5 V恒星(2质量J14202949-3112074; $T_{\rm eff}$ = $6478^{+94}_{-89}$ K),发现作为下一代过境调查(NGTS)的一部分。这颗行星的轨道是P=4.51天,质量为$0.74^{+0.13}_{-0.12}$ M $_{J}$,半径为$1.595^{+0.047}_{-0.045}$ R $_{J}$,密度为$0.226^{+0.040}_{-0.038}$ g cm $^{-3}$,因此是目前已知密度最低的系外行星之一。NGTS-2b在一颗明亮的V=10.96的主星周围有相对较深的1.0%的凌日,是通过大气透射光谱探测巨行星组成的主要目标。快速旋转($vsin$ i= $15.2\pm0.8$ km s $^{-1}$)也使该系统成为Rossiter McLaughlin后续观测的一个很好的候选者,以测量天空投影的恒星平行度。由于NGTS光度测定的高精度,无需后续光度测定即可确认NGTS-2b。
A search for transit timing variations in the transiting hot Jupiter systems HIP 65, NGTS-6, NGTS-10 and WASP-173
Keele University(基尔大学);University of Edinburgh(爱丁堡大学);University of Hertfordshire(赫特福德大学);Niels Bohr Institute(尼尔斯·玻尔研究所);Cosmic Dawn Centre (DAWN)(宇宙黎明中心(DAWN));University of Leeds(利兹大学);Università di Salerno(萨莱诺大学);Istituto Nazionale di Fisica Nucleare, Sezione di Napoli(意大利国家核物理研究院那不勒斯分部);Universität Hamburg(汉堡大学);Alma Mater Studiorum - University of Bologna(博洛尼亚大学);University of St Andrews(圣安德鲁斯大学);Universidad de Atacama(阿塔卡马大学);Millennium Institute of Astrophysics MAS(天体物理学千年研究所 MAS);Pontificia Universidad Católica de Chile(智利天主教 Pontificia 大学);University of Southern Denmark(南丹麦大学);Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH)(海德堡大学天文学计算研究所 (ZAH));Seoul National University(首尔大学);Universidad de Antofagasta(安托法加斯塔大学);Università degli Studi di Roma Tor Vergata(罗马第二大学);Max Planck Institute for Astronomy(马克斯·普朗克天文学研究所);Universidade de Coimbra(科英布拉大学);Universidad Católica de la Santísima Concepción(至圣领报天主教大学);Perimeter Institute for Theoretical Physics(理论物理珀imeter研究所);The Open University(开放大学)
BOWIE-ALIGN: Exploring degeneracies in the muted transmission spectrum of the aligned hot Jupiter NGTS-2b with NIRSpec/G395H
University of Warwick(华威大学);University of Bristol(布里斯托大学);Imperial College London(帝国理工学院);Max Planck Institute for Astronomy (MPIA)(马克斯·普朗克天文学研究所);Johns Hopkins University(约翰斯·霍普金斯大学);Academia Sinica(中央研究院);University of Leeds(利兹大学);Ludwig-Maximilians-Universität München(慕尼黑大学)
Inhomogeneous Cloud Coverage and Altitude-Dependent Heat Transport on the Hot-Jupiter NGTS-10 Ab from its Optical-to-Infrared Phase Curve
Planétarium de Montréal, Espace pour la Vie(蒙特利尔天文馆,生命空间);Trottier Institute for Research on Exoplanets, Department of Physics, Université de Montréal(特罗蒂埃系外行星研究所,物理系,蒙特利尔大学);Laboratoire Lagrange, Université de la Côte d’Azur, Observatoire de la Côte d’Azur, CNRS(拉格朗日实验室,蔚蓝海岸大学,蔚蓝海岸天文台,法国国家科学研究中心);Johns Hopkins APL(约翰斯·霍普金斯大学应用物理实验室);Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University(汤川秀树研究所与物理天文学院,上海交通大学);Astrophysics & Space Center, Schmidt Sciences(天体物理与太空中心,施密特科学);School of Earth and Space Exploration, Arizona State University(地球与太空探索学院,亚利桑那州立大学);Astrophysics, Department of Physics, University of Oxford(天体物理学,物理系,牛津大学);Department of Astronomy & Astrophysics, University of California, Santa Cruz(天文与天体物理学系,加州大学圣克鲁兹分校);Anton Pannekoek Institute for Astronomy, University of Amsterdam(安东·潘内科克天文学研究所,阿姆斯特丹大学);Department of Astronomy & Astrophysics, University of Chicago(天文与天体物理学系,芝加哥大学)
短周期轨道上的巨行星预计会膨胀,最终被其宿主恒星吞没。然而,这些过程的详细时间表和阶段尚不清楚。在这里,我们发现了三个热彗星(P $<$ 10 d)的轨道演化,中等质量的恒星($M_\star$ $\approx$ 1.5 M $_\odot$,2 R $_\odot$ $<$ $R_\star < $ 5 R $_\odot$)。通过结合\tess测光与地面测光和径向速度测量,我们报告的质量和半径为0.4和1.8 M $_\mathrm{J}$和0.8和1.8 R $_\mathrm{J}$这三颗行星。\planet是迄今为止在红巨星周围发现的所有行星中周期最短的(P= \period)。\planettwo和\planetthree均显示充盈,但\planet未显示任何充盈迹象。\planettwo和\planetthree的大半径和相对较低的质量使它们成为目前已知的密度最低的热中子星之一,而\planet相反地是密度最高的热中子星之一。这三颗行星的轨道偏心率都低于0.2。这些系统在半径上的巨大差异意味着行星膨胀对行星质量、半径、入射通量和轨道特性有着复杂的依赖性。我们预测\planet是目前已知的所有行星中轨道衰变时间最短的,但在这个系统中没有检测到任何轨道衰变。\planettwo的透射光谱将为探测围绕演化恒星运行的行星大气中的水、二氧化碳和一氧化碳特征提供有利的机会,并可…
JWST and HST Confirm Transit Timing Variations for the Ultra-Hot Jupiter TOI-2109 b
Carnegie Institution for Science(卡内基科学机构);University of California San Diego(加州大学圣迭戈分校);Carnegie Science Observatories(卡内基科学天文台);Space Telescope Science Institute(太空望远镜科学研究所);University of Oxford(牛津大学);University of California, Santa Cruz(加州大学圣克鲁兹分校);University of Hawai‘i(夏威夷大学)
Fractal Aggregate Aerosols in the Virga Cloud Code II: Exploring the Effects of Key Cloud Parameters in Warm Neptune, Hot Jupiter and Brown Dwarf Atmospheres
School of Physics, HH Wills Physics Laboratory(物理学院,HH威尔斯物理实验室);NASA Goddard Space Flight Center(美国国家航空航天局戈达德太空飞行中心);University of Arizona(亚利桑那大学)