Massive planets in FU Orionis discs: implications for thermal instability models

Details Massive planets in FU Orionis discs: implications for thermal instability models Massive planets in FU Orionis discs: implications for thermal instability models

2004-06-10

arxiv.org/abs/astro-ph/0406264v1

Astronomy and Astrophysics

Astrophysics

13 pages, 10 figures, accepted by MNRAS

Scientific paper

10.1111/j.1365-2966.2004.08112.x

FU Orionis are young stellar objects undergoing episodes of enhanced luminosity, which are generally ascribed to a sudden increase of mass accretion rate in the surrounding protostellar disc. Models invoking a thermal instability in the disc are able to reproduce many features of the outburst, but cannot explain the rapid rise time-scale observed in many cases. Here we explore the possibility (originally suggested by Clarke & Syer 1996) that the thermal instability is triggered away from the disc inner edge (at a distance of $\approx 10R_{\odot}$ from the central protostar) due to the presence of a massive planet embedded in the disc. We have constructed simple, one-dimensional, time-dependent models of the disc evolution, taking into account both the interaction between the disc and the planet, and the thermal evolution of the disc. We are indeed able to reproduce rapid rise outbursts (with rise time-scale $\approx 1$ yr), with a planet mass $M_{\mathrm{s}}=10-15M_{\mathrm{Jupiter}}$. We show that the luminosity and the duration of the outbursts are increasing functions of planet mass. We also show that the inward migration of the planet is significantly slowed once it reaches the radius where it is able to trigger FU Orionis outbursts, thus suggesting that a single planet may be involved in triggering several outbursts.

Affiliated with

Also associated with

No associations

Rating

Massive planets in FU Orionis discs: implications for thermal instability models 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 Massive planets in FU Orionis discs: implications for thermal instability models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Massive planets in FU Orionis discs: implications for thermal instability models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-668174