354 citations · 2.2k across the 23 of their papers we have counts for
11 papers · 1 filter
Enhanced Dust Emission in the HL Tau Disc: A Low-Mass Companion in Formation?
J. S. Greaves, A. M. S. Richards, W. K. M. Rice +1
We have imaged the disc of the young star HL Tau using the VLA at 1.3 cm, with 0.08" resolution (as small as the orbit of Jupiter). The disc is around half the stellar mass, assumi…
Dust filtration at gap edges: Implications for the spectral energy distributions of discs with embedded planets
W. K. M. Rice, Philip J. Armitage, Kenneth Wood +1
The spectral energy distributions (SEDs) of some T Tauri stars display a deficit of near-IR flux that could be a consequence of an embedded Jupiter-mass planet partially clearing a…
Investigating fragmentation conditions in self-gravitating accretion discs
W. K. M. Rice, G. Lodato, P. J. Armitage
The issue of fragmentation in self-gravitating gaseous accretion discs has implications both for the formation of stars in discs in the nuclei of active galaxies, and for the forma…
Planetary migration
Philip J. Armitage, W. K. M. Rice
Gravitational torques between a planet and gas in the protoplanetary disk result in orbital migration of the planet, and are likely to play an important role in the formation and e…
Quantifying orbital migration from exoplanet statistics and host metallicities
W. K. M. Rice, Philip J. Armitage
We investigate how the statistical distribution of extrasolar planets may be combined with knowledge of the host stars' metallicity to yield constraints on the migration histories…
Accelerated planetesimal growth in self-gravitating protoplanetary discs
W. K. M. Rice, G. Lodato, J. E. Pringle +2
In this paper we consider the evolution of small planetesimals in marginally stable, self-gravitating protoplanetary discs. The drag force between the disc gas and the embedded pla…
Substellar companions and isolated planetary mass objects from protostellar disc fragmentation
W. K. M. Rice, P. J. Armitage, I. A. Bonnell +3
Self-gravitating protostellar discs are unstable to fragmentation if the gas can cool on a time scale that is short compared to the orbital period. We use a combination of hydrodyn…
On the formation time scale and core masses of gas giant planets
W. K. M. Rice, Philip J. Armitage
Numerical simulations show that the migration of growing planetary cores may be dominated by turbulent fluctuations in the protoplanetary disk, rather than by any mean property of…
On the stability of self-gravitating protoplanetary discs
W. K. M. Rice, P. J. Armitage, I. A. Bonnell +1
It has already been shown, using a local model, that accretion discs with cooling times t_cool <= 3 Omega^-1 fragment into gravitationally bound objects, while those with cooling t…
Constraints on a planetary origin for the gap in GM Aurigae's protoplanetary disc
W. K. M. Rice, Kenneth Wood, P. J. Armitage +2
The unusual spectral energy distribution (SED) of the classical T Tauri star GM Aurigae provides evidence for the presence of an inner disc hole extending to several au. Using a co…
The effect of cooling on the global stability of self-gravitating protoplanetary discs
W. K. M. Rice, P. J. Armitage, M. R. Bate +1
Using a local model Gammie (2001) has shown that accretion discs with cooling times t_cool <= 3/Omega fragment into gravitationally bound objects, while those with cooling times t_…