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

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arxiv 2006.13248 v2 pith:635KHMF4 submitted 2020-06-23 astro-ph.EP astro-ph.SR

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

Peter Plavchan , Thomas Barclay , Jonathan Gagn\'e , Peter Gao , Bryson Cale , William Matzko , Diana Dragomir , Sam Quinn
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Dax Feliz Keivan Stassun Ian J. M. Crossfield David A. Berardo David W. Latham Ben Tieu Guillem Anglada-Escud\'e George Ricker Roland Vanderspek Sara Seager Joshua N. Winn Jon M. Jenkins Stephen Rinehart Akshata Krishnamurthy Scott Dynes John Doty Fred Adams Dennis A. Afanasev Chas Beichman Mike Bottom Brendan P. Bowler Carolyn Brinkworth Carolyn J. Brown Andrew Cancino David R. Ciardi Mark Clampin Jake T. Clark Karen Collins Cassy Davison Daniel Foreman-Mackey Elise Furlan Eric J. Gaidos Claire Geneser Frank Giddens Emily Gilbert Ryan Hall Coel Hellier Todd Henry Jonathan Horner Andrew W. Howard Chelsea Huang Joseph Huber Stephen R. Kane Matthew Kenworthy John Kielkopf David Kipping Chris Klenke Ethan Kruse Natasha Latouf Patrick Lowrance Bertrand Mennesson Matthew Mengel Sean M. Mills Tim Morton Norio Narita Elisabeth Newton America Nishimoto Jack Okumura Enric Palle Joshua Pepper Elisa V. Quintana Aki Roberge Veronica Roccatagliata Joshua E. Schlieder Angelle Tanner Johanna Teske C. G. Tinney Andrew Vanderburg Kaspar von Braun Bernie Walp Jason Wang Sharon Xuesong Wang Denise Weigand Russel White Robert A. Wittenmyer Duncan J. Wright Allison Youngblood Hui Zhang Perri Zilberman
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classification astro-ph.EP astro-ph.SR
keywords planetstardebrisdiskaroundastronomicaldistancejupiter
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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. AU Mic possesses a relatively rare and spatially resolved3 edge-on debris disk extending from about 35 to 210 astronomical units from the star, and with clumps exhibiting non-Keplerian motion. 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. 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 sigma 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.

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  1. Unstable magnetospheric accretion on the T Tauri star TW Hya

    astro-ph.SR 2026-07 accept novelty 4.5

    TW Hya’s large-scale field is a ~0.83 kG tilted dipole that varies yearly; accretion is unstable (rmag/rcor ≈ 0.33–0.40) and no close-in planet is detected above ~0.3–1 Mjup.