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

Plavchan, Peter and Barclay, Thomas and Gagne, Jonathan and Gao, Peter and Cale, Bryson and Matzko, William and Dragomir, Diana and Quinn, Sam and Feliz, Dax and Stassun, Keivan and Crossfield, Ian J.M. and Berardo, David A. and Latham, David W. and Tieu, Ben and Anglada-Escude, Guillem and Ricker, George and Vanderspek, Roland and Seager, Sara and Winn, Joshua N. and Jenkins, Jon M. and Rinehart, Stephen and Krishnamurthy, Akshata and Dynes, Scott and Doty, John and Adams, Fred and Afanasev, Dennis A. and Beichman, Chas and Bottom, Mike and Bowler, Brendan P. and Brinkworth, Carolyn and Brown, Carolyn J. and Cancino, Andrew and Ciardi, David R. and Clampin, Mark and Clark, Jake T. and Collins, Karen and Davison, Cassy and Foreman-Mackey, Daniel and Furlan, Elise and Gaidos, Eric J. and Geneser, Claire and Giddens, Frank and Gilbert, Emily and Hall, Ryan and Hellier, Coel and Henry, Todd and Horner, Jonathan and Howard, Andrew W. and Huang, Chelsea and Huber, Joseph and Kane, Stephen R. and Kenworthy, Matthew and Kielkopf, John and Kipping, David and Klenke, Chris and Kruse, Ethan and Latouf, Natasha and Lowrance, Patrick and Mennesson, Bertrand and Mengel, Matthew and Mills, Sean M. and Morton, Tim and Narita, Norio and Newton, Elisabeth and Nishimoto, America and Okumura, Jack and Palle, Enric and Pepper, Joshua and Quintana, Elisa V. and Roberge, Aki and Roccatagliata, Veronica and Schlieder, Joshua E. and Tanner, Angelle and Teske, Johanna and Tinney, C. G. and Vanderburg, Andrew and von Braun, Kaspar and Walp, Bernie and Wang, Jason and Wang, Sharon Xuesong and Weigand, Denise and White, Russel and Wittenmyer, Robert A. and Wright, Duncan J. and Youngblood, Allison and Zhang, Hui and Zilberman, Perri (2020) A planet within the debris disk around the pre-main-sequence star AU Microscopii. Nature, 582. pp. 497-500. ISSN 0028-0836


Abstract

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<SUP>1</SUP>. AU Mic possesses a relatively rare<SUP>2</SUP> and spatially resolved<SUP>3</SUP> edge-on debris disk extending from about 35 to 210 astronomical units from the star<SUP>4</SUP>, and with clumps exhibiting non-Keplerian motion<SUP>5-7</SUP>. 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<SUP>8,9</SUP>. 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 3σ 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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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Date Deposited: 15 Sep 2020 00:20
Last Modified: 24 Sep 2020 06:22
Uncontrolled Keywords: Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar; and Stellar Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: https://doi.org/10.1038/s41586-020-2400-z
URI: http://eprints.usq.edu.au/id/eprint/39327

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