Some reports indicate that AU Mic b must migrate into its present location, https://phys.org/news/2020-06-neptune-sized-planet-orbiting-young-nearby.html
. The debris disk is studied in various reports too, https://ui.adsabs.harvard.edu/abs/2018csss.confE..16G/abstract
, some show the disk is eroding rapidly.
'A planet within the debris disk around the pre-main-sequence star AU Microscopii', https://www.nature.com/articles/s41586-020-2400-z
"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 motion5,6,7. 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 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."
This is some geeky stuff that I enjoy and show good observations and possible constraints on disk modeling for *new stars* and *new planets*
In our solar system we have no planets near 58 earth masses orbiting 0.07 au from the Sun.