Zobrazeno 1 - 10
of 169
pro vyhledávání: '"Rice, W. K. M."'
It is likely that most protostellar systems undergo a brief phase where the protostellar disc is self-gravitating. If these discs are prone to fragmentation, then they are able to rapidly form objects that are initially of several Jupiter masses and
Externí odkaz:
http://arxiv.org/abs/1711.01133
Autor:
Ilee, J. D., Forgan, D. H., Evans, M. G., Hall, C., Booth, R., Clarke, C. J., Rice, W. K. M., Boley, A. C., Caselli, P., Hartquist, T. W., Rawlings, J. M. C.
In this paper, we model the chemical evolution of a 0.25 M$_{\odot}$ protoplanetary disc surrounding a 1 M$_{\odot}$ star that undergoes fragmentation due to self-gravity. We use Smoothed Particle Hydrodynamics including a radiative transfer scheme,
Externí odkaz:
http://arxiv.org/abs/1708.01815
The mechanism through which meter-sized boulders grow to km-sized planetesimals in protoplanetary discs is a subject of active research, since it is critical for planet formation. To avoid spiralling into the protostar due to aerodynamic drag, object
Externí odkaz:
http://arxiv.org/abs/1508.02879
We study particle dynamics in self-gravitating gaseous discs with a simple cooling law prescription via two-dimensional simulations in the shearing sheet approximation. It is well known that structures arising in the gaseous component of the disc due
Externí odkaz:
http://arxiv.org/abs/1404.6953
Recently it has been suggested that the fragmentation boundary in Smoothed Particle Hydrodynamic (SPH) and FARGO simulations of self-gravitating accretion discs with beta-cooling do not converge as resolution is increased. Furthermore, this recent wo
Externí odkaz:
http://arxiv.org/abs/1311.7355
Autor:
Rice, W. K. M.
Whistlers have, for many years, been used as probes of the ionosphere and magnetosphere. Whistlers received on the ground have been shown (Smith [1961], Helliwell [1965]) to have propagated, in almost all cases, through ducts of enhanced ionisation a
Externí odkaz:
http://hdl.handle.net/10413/4825
It is well accepted that 'hot Jupiters' did not form in situ, as the temperature in the protoplanetary disc at the radius at which they now orbit would have been too high for planet formation to have occurred. These planets, instead, form at larger r
Externí odkaz:
http://arxiv.org/abs/1207.5970
We study particle dynamics in local two-dimensional simulations of self-gravitating accretion discs with a simple cooling law. It is well known that the structure which arises in the gaseous component of the disc due to a gravitational instability ca
Externí odkaz:
http://arxiv.org/abs/1207.4677
Recent simulations of self-gravitating accretion discs, carried out using a three-dimensional Smoothed Particle Hydrodynamics (SPH) code by Meru and Bate, have been interpreted as implying that three-dimensional global discs fragment much more easily
Externí odkaz:
http://arxiv.org/abs/1111.3147
Self-gravity becomes competitive as an angular momentum transport process in accretion discs at large radii, where the temperature is low enough that external irradiation likely contributes to the thermal balance. Irradiation is known to weaken the s
Externí odkaz:
http://arxiv.org/abs/1108.1194