Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Lovelace, Richard V. E."'
Autor:
Romanova, Marina M., Koldoba, Alexander V., Ustyugova, Galina V., Lai, Dong, Lovelace, Richard V. E.
We carry out hydrodynamical simulations to study the eccentricity growth of a 1-30 Jupiter mass planet located inside the fixed cavity of a protoplanetary disc. The planet exchanges energy and angular momentum with the disc at resonant locations, and
Externí odkaz:
http://arxiv.org/abs/2303.17784
We study the Rossby wave instability (RWI) in a thin accretion disc threaded by an initially toroidal magnetic field using the magnetohydrodynamics (MHD) code PLUTO. We find that for plasma $10^1 < \beta < 10^3$ , the growth rate and late-time densit
Externí odkaz:
http://arxiv.org/abs/1711.08849
Autor:
Romanova, Marina M., Blinova, Alisa A., Ustyugova, Galina V., Koldoba, Alexander V., Lovelace, Richard V. E.
We investigate the properties of magnetized stars in the propeller regime using axisymmetric numerical simulations. We modelled the propeller regime for stars with realistically large magnetospheres (5-7 stellar radii), so that our results could be a
Externí odkaz:
http://arxiv.org/abs/1704.08336
Autor:
Dyda, Sergei, Lovelace, Richard V. E., Ustyugova, Galina V., Koldoba, Alexander V., Wasserman, Ira
We numerically investigate the generation of a magnetic field in a protostellar disc via an $\alpha \Omega$-dynamo and the resulting magnetohydrodynamic (MHD) driven outflows. We find that for small values of the dimensionless dynamo parameter $\alph
Externí odkaz:
http://arxiv.org/abs/1507.08702
Autor:
Dyda, Sergei, Lovelace, Richard V. E., Ustyugova, Galina V., Lii, Patrick S., Romanova, Marina M., Koldoba, Alexander V.
Observations of jets from young stellar objects reveal the asymmetric outflows from some sources. A large set of $2.5$D MHD simulations has been carried out for axisymmetric viscous/diffusive disc accretion to rotating magnetized stars for the purpos
Externí odkaz:
http://arxiv.org/abs/1502.01357
We use an N-body simulation, constructed using GADGET-2, to investigate an accretion flow onto an astrophysical disk that is in the opposite sense to the disk's rotation. In order to separate dynamics intrinsic to the counter-rotating flow from the i
Externí odkaz:
http://arxiv.org/abs/1412.5508
A non-negligible fraction of a Supermassive Black Hole's (SMBH) rest mass energy gets transported into extragalactic space by a remarkable process in jets which are incompletely understood. What are the physical processes which transport this energy?
Externí odkaz:
http://arxiv.org/abs/1412.3835
Observations of galaxies and models of accreting systems point to the occurrence of counter-rotating discs where the inner part of the disc ($r
Externí odkaz:
http://arxiv.org/abs/1408.5625
Autor:
Dyda, Sergei, Lovelace, Richard V. E., Ustyugova, Galina V., Romanova, Marina M., Koldoba, Alexander V.
Counter-rotating discs can arise from the accretion of a counter-rotating gas cloud onto the surface of an existing co-rotating disc or from the counter-rotating gas moving radially inward to the outer edge of an existing disc. At the interface, the
Externí odkaz:
http://arxiv.org/abs/1408.5626
An analytic model is developed for the erosion of protoplanetary gas discs by high velocity magnetized stellar winds. The winds are centrifugally driven from the surface of rapidly rotating, strongly magnetized young stars. The presence of the magnet
Externí odkaz:
http://arxiv.org/abs/1405.5720