A planet within the debris disk around the pre-main-sequence star AU Microscopii,Nature

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A planet within the debris disk around the pre-main-sequence star AU Microscopii
Nature ( IF 50.5 ) Pub Date : 2020-06-01 , DOI: 10.1038/s41586-020-2400-z
Peter Plavchan ₁ , Thomas Barclay _{2,

3} , Jonathan Gagné ₄ , Peter Gao ₅ , Bryson Cale ₁ , William Matzko ₁ , Diana Dragomir _{6,

7} , Sam Quinn ₈ , Dax Feliz ₉ , Keivan Stassun ₉ , Ian J M Crossfield _{6,

10} , David A Berardo ₆ , David W Latham ₈ , Ben Tieu ₁ , Guillem Anglada-Escudé ₁₁ , George Ricker ₆ , Roland Vanderspek ₆ , Sara Seager ₆ , Joshua N Winn ₁₂ , Jon M Jenkins ₁₃ , Stephen Rinehart ₃ , Akshata Krishnamurthy ₆ , Scott Dynes ₆ , John Doty ₃ , Fred Adams ₁₄ , Dennis A Afanasev ₃ , Chas Beichman _{15,

16} , Mike Bottom ₁₇ , Brendan P Bowler ₁₈ , Carolyn Brinkworth ₁₉ , Carolyn J Brown ₂₀ , Andrew Cancino ₂₁ , David R Ciardi ₁₆ , Mark Clampin ₃ , Jake T Clark ₂₀ , Karen Collins ₈ , Cassy Davison ₂₂ , Daniel Foreman-Mackey ₂₃ , Elise Furlan ₁₅ , Eric J Gaidos ₂₄ , Claire Geneser ₂₅ , Frank Giddens ₂₁ , Emily Gilbert ₂₆ , Ryan Hall ₂₂ , Coel Hellier ₂₇ , Todd Henry ₂₈ , Jonathan Horner ₂₀ , Andrew W Howard ₂₉ , Chelsea Huang ₆ , Joseph Huber ₂₁ , Stephen R Kane ₃₀ , Matthew Kenworthy ₃₁ , John Kielkopf ₃₂ , David Kipping ₃₃ , Chris Klenke ₂₁ , Ethan Kruse ₃ , Natasha Latouf ₁ , Patrick Lowrance ₃₄ , Bertrand Mennesson ₁₅ , Matthew Mengel ₂₀ , Sean M Mills ₂₉ , Tim Morton ₃₅ , Norio Narita _{36,

37,

38,

39,

40} , Elisabeth Newton ₄₁ , America Nishimoto ₂₁ , Jack Okumura ₂₀ , Enric Palle ₄₀ , Joshua Pepper ₄₂ , Elisa V Quintana ₃ , Aki Roberge ₃ , Veronica Roccatagliata _{43,

44,

45} , Joshua E Schlieder ₃ , Angelle Tanner ₂₅ , Johanna Teske ₄₆ , C G Tinney ₄₇ , Andrew Vanderburg ₁₈ , Kaspar von Braun ₄₈ , Bernie Walp ₄₉ , Jason Wang _{5,

29} , Sharon Xuesong Wang ₄₆ , Denise Weigand ₂₁ , Russel White ₂₂ , Robert A Wittenmyer ₂₀ , Duncan J Wright ₂₀ , Allison Youngblood ₃ , Hui Zhang ₅₀ , Perri Zilberman ₅₁

Affiliation

Department of Physics and Astronomy, George Mason University, Fairfax, VA, USA.
Center for Space Sciences and Technology, University of Maryland Baltimore County (UMBC), Baltimore, MD, USA.
Exoplanets and Stellar Astrophysics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA.
Institute for Research on Exoplanets, Département de Physique, Université de Montréal, Montréal, Quebec, Canada.
Department of Astronomy, University of California, Berkeley, CA, USA.
Massachusetts Institute of Technology, Cambridge, MA, USA.
Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA.
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA.
Department of Physics and Astronomy, Vanderbilt University, Nashville, TN, USA.
Department of Physics and Astronomy, University of Kansas, Lawrence, KS, USA.
School of Physics and Astronomy, Queen Mary, University of London, London, UK.
Department of Astrophysical Sciences, Princeton University, Princeton, NJ, USA.
SETI Institute, Mountain View, CA, USA.
Department of Astronomy, University of Michigan, Ann Arbor, MI, USA.
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.
NASA Exoplanet Science Institute, California Institute of Technology, Pasadena, CA, USA.
Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI, USA.
Department of Astronomy, University of Texas at Austin, Austin, TX, USA.
University Corporation for Atmospheric Research, Boulder, CO, USA.
University of Southern Queensland, Centre for Astrophysics, Toowoomba, Queensland, Australia.
Department of Physics, Astronomy and Materials Science, Missouri State University, Springfield, MO, USA.
Department of Physics and Astronomy, Georgia State University, Atlanta, GA, USA.
Center for Computational Astrophysics, Flatiron Institute, New York, NY, USA.
Department of Earth Sciences, University of Hawaii at Manoa, Honolulu, HI, USA.
Department of Physics and Astronomy, Mississippi State University, Starkville, MS, USA.
Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL, USA.
Keele University, Keele, Staffordshire, UK.
RECONS Institute, Chambersburg, PA, USA.
Department of Astronomy, California Institute of Technology, Pasadena, CA, USA.
Department of Earth and Planetary Sciences, University of California, Riverside, CA, USA.
Leiden Observatory, Leiden University, Leiden, The Netherlands.
Department of Physics and Astronomy, University of Louisville, Louisville, KY, USA.
Department of Astronomy, Columbia University, New York, NY, USA.
IPAC, California Institute of Technology, Pasadena, CA, USA.
Astronomy Department, University of Florida, Gainesville, FL, USA.
Department of Astronomy, The University of Tokyo, Tokyo, Japan.
JST, PRESTO, Tokyo, Japan.
Astrobiology Center, NINS, Tokyo, Japan.
National Astronomical Observatory of Japan, NINS, Tokyo, Japan.
Instituto de Astrofisica de Canarias (IAC), La Laguna, Tenerife, Spain.
Department of Physics and Astronomy, Dartmouth College, Hanover, NH, USA.
Department of Physics, Lehigh University, Bethlehem, PA, USA.
Dipartimento di Fisica "Enrico Fermi", Universita' di Pisa, Pisa, Italy.
INAF-Osservatorio Astrofisico di Arcetri, Firenze, Italy.
INFN, Sezione di Pisa, Pisa, Italy.
Observatories of the Carnegie Institution for Science, Pasadena, CA, USA.
Exoplanetary Science at UNSW, School of Physics, UNSW Sydney, New South Wales, Australia.
Lowell Observatory, Flagstaff, AZ, USA.
NASA Infrared Telescope Facility, Hilo, HI, USA.
School of Astronomy and Space Science, Key Laboratory of Ministry of Education, Nanjing University, Nanjing, China.
SUNY Stony Brook, Stony Brook, NY, USA.

AU Microscopii (AU Mic) is the second closest pre-main-sequence star, at a distance of 9.79 parsecs and with an age of 22 million years 1 . AU Mic possesses a relatively rare 2 and spatially resolved 3 edge-on debris disk extending from about 35 to 210 astronomical units from the star 4 , and with clumps exhibiting non-Keplerian motion 5 – 7 . Detection of newly formed planets around such a star is challenged by the presence of spots, plage, flares and other manifestations of magnetic ‘activity’ on the star 8 , 9 . Here we report observations of a planet transiting AU Mic. The transiting planet, AU Mic b, has an orbital period of 8.46 days, an orbital distance of 0.07 astronomical units, a radius of 0.4 Jupiter radii, and a mass of less than 0.18 Jupiter masses at 3 σ confidence. Our observations of a planet co-existing with a debris disk offer the opportunity to test the predictions of current models of planet formation and evolution. A transiting planet with a period of about 8.5 days and a radius 0.4 times that of Jupiter is reported within the debris disk around the star AU Microscopii.

中文翻译：

主序前恒星AU Microscopii周围的碎片盘中的一颗行星

AU Microscopii (AU Mic) 是第二近的主序前恒星，距离为 9.79 秒差距，年龄为 2200 万年 1 。AU Mic 拥有一个相对罕见的 2 和空间分辨 3 边缘碎片盘，从恒星 4 延伸约 35 到 210 个天文单位，并且具有表现出非开普勒运动 5-7 的团块。探测这样一颗恒星周围新形成的行星受到恒星上存在的斑点、斑块、耀斑和其他磁“活动”现象的挑战 8, 9 。在这里，我们报告了对经过 AU Mic 的行星的观察。凌日行星AU Mic b的轨道周期为8.46天，轨道距离为0.07天文单位，半径为0.4木星半径，在3σ置信度下质量小于0.18木星质量。我们对与碎片盘共存的行星的观察提供了检验当前行星形成和演化模型预测的机会。据报道，在 AU Microscopii 恒星周围的碎片盘内有一颗周期约为 8.5 天、半径为木星 0.4 倍的凌日行星。

更新日期：2020-06-01

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