A Mini-Neptune Orbiting the Metal-poor K Dwarf BD+29 2654
(2023)
Journal Article
A planet within the debris disk around the pre-main-sequence star AU Microscopii.
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 years1. AU Mic possesses a relatively rare2 and spatially resolved3 edge-on debris disk extending from about 35 to 210 astronomical units from the star4, and with clumps exhibiting non-Keplerian motion5-7. 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 star8,9. 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 3s 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.
Acceptance Date | Mar 17, 2020 |
---|---|
Publication Date | Jun 24, 2020 |
Journal | Nature |
Print ISSN | 0028-0836 |
Publisher | Nature Publishing Group |
Pages | 497 - 500 |
DOI | https://doi.org/10.1038/s41586-020-2400-z |
Publisher URL | https://www.nature.com/articles/s41586-020-2400-z |
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