Giant planet migration during FU Orionis outbursts: 1D disc models

Dunhill, Alex orcid iconORCID: 0000-0003-3951-0318 (2018) Giant planet migration during FU Orionis outbursts: 1D disc models. Monthly Notices Of The Royal Astronomical Society, 478 (3). pp. 3438-3446. ISSN 0035-8711

[thumbnail of Version of Record]
PDF (Version of Record) - Published Version
Available under License Creative Commons Attribution.


Official URL:


I present the results of semi-analytic calculations of migrating planets in young, outbursting circumstellar discs. Formed far out in the disc via gravitational fragmentation early on in its lifetime, these planets typically migrate at very slow rates and are therefore mostly expected to remain at large radii (such as is the case in HR 8799). I show that changes in the disc structure during FUor outbursts affect the planet’s ability to maintain a gap and can allow a massive giant planet’s semimajor axis to reduce by almost 5 per cent in a single outburst under the most optimistic conditions. Given that a single disc will likely undergo ∼ 10 such outbursts this process can significantly alter the expected radial distribution for GI-formed planets.

Repository Staff Only: item control page