Fu Ori outbursts and the planet-disc mass exchange

Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

revised and resubmitted to MNRAS. 23 pages, 16 figures

Scientific paper

It has been recently proposed that giant protoplanets migrating inward through the disc more rapidly than they contract could be tidally disrupted when they fill their Roche lobes ~ 0.1 AU away from their parent protostars. Here we consider the process of mass and angular momentum exchange between the tidally disrupted planet and the surrounding disc in detail. We find that the planet's adiabatic mass-radius relation and its ability to open a deep gap in the disc determine whether the disruption proceeds as a sudden runaway or a balanced quasi-static process. In the latter case the planet feeds the inner disc through its Lagrangian L1 point like a secondary star in a stellar binary system. As the planet loses mass it gains specific angular momentum and normally migrates in the outward direction until the gap closes. Numerical experiments show that planet disruption outbursts are preceded by long "quiescent" periods during which the disc inward of the planet is empty. The hole in the disc is created when the planet opens a deep gap, letting the inner disc to drain onto the star while keeping the outer one stalled behind the planet. We find that the mass-losing planet embedded in a realistic protoplanetary disc spawns an extremely rich set of variability patterns. In a subset of parameter space, there is a limit cycle behaviour caused by non-linear interaction between the planet mass loss and the disc hydrogen ionisation instability. We suggest that tidal disruptions of young massive planets near their stars may be responsible for the observed variability of young accreting protostars such as FU Ori, EXor and T Tauri stars in general.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Fu Ori outbursts and the planet-disc mass exchange does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fu Ori outbursts and the planet-disc mass exchange, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fu Ori outbursts and the planet-disc mass exchange will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-686149

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.