Zobrazeno 1 - 10
of 290
pro vyhledávání: '"Ogilvie, Gordon I"'
Autor:
Held, Loren E., Ogilvie, Gordon I.
Many accretion discs have been found to be distorted: either warped due a misalignment in the system, or non-circular as a result of orbital eccentricity or tidal deformation by a binary companion. Warped, eccentric, and tidally distorted discs are n
Externí odkaz:
http://arxiv.org/abs/2409.11490
Autor:
Brown, Joshua J., Ogilvie, Gordon I.
The key difficulty faced by 2D models for planet-disc interaction is in appropriately accounting for the impact of the disc's vertical structure on the dynamics. 3D effects are often mimicked via softening of the planet's potential; however, the plan
Externí odkaz:
http://arxiv.org/abs/2409.02687
Attempts to understand the dynamics of warped astrophysical discs have garnered significant attention, largely motivated by the growing catalogue of observed distorted systems. Previous studies have shown that the evolution of the warp is crucially r
Externí odkaz:
http://arxiv.org/abs/2301.07176
We simulate the propagation and dissipation of tidally induced nonlinear gravity waves in the cores of solar-type stars. We perform hydrodynamical simulations of a previously developed Boussinesq model using a spectral-element code to study the stell
Externí odkaz:
http://arxiv.org/abs/2210.12880
Autor:
Deng, Hongping, Ogilvie, Gordon I.
Astrophysical disks that are sufficiently cold and dense are linearly unstable to the formation of axisymmetric rings as a result of the disk's gravity. In practice, spiral structures are formed, which may in turn produce bound fragments. We study a
Externí odkaz:
http://arxiv.org/abs/2207.07960
Autor:
Ogilvie, Gordon I.
We show how the local approximation of astrophysical discs, which is the basis for the well known model of the shearing box, can be used to study many aspects of the dynamics of warped discs. In the local model, inclination of the orbit of a test par
Externí odkaz:
http://arxiv.org/abs/2204.00535
We revisit the Tidally Excited Oscillations (TEOs) in the A-type, main-sequence, eccentric binary KOI-54, the prototype of heartbeat stars. Although the linear tidal response of the star is a series of orbital-harmonic frequencies which are not stell
Externí odkaz:
http://arxiv.org/abs/2202.06101
Autor:
Lin, Yufeng, Ogilvie, Gordon I.
In rotating stars and planets, excitation of inertial waves in convective envelopes provides an important channel for tidal dissipation, but the dissipation rate due to inertial waves depends erratically on the tidal frequency. Tidal dissipation is s
Externí odkaz:
http://arxiv.org/abs/2108.08515
Understanding oscillations and waves in astrophysical fluid bodies helps to elucidate their observed variability and the underlying physical mechanisms. Indeed, global oscillations and bending modes of accretion discs or tori may be relevant to quasi
Externí odkaz:
http://arxiv.org/abs/2105.12465
Importance of magnetic fields in highly eccentric discs with applications to tidal disruption events
Autor:
Lynch, Elliot M., Ogilvie, Gordon I.
Whether tidal disruption events (TDEs) circularise or accrete directly as a highly eccentric disc is the subject of current research and appears to depend sensitively on the disc thermodynamics. In a previous paper we applied the theory of eccentric
Externí odkaz:
http://arxiv.org/abs/2101.01221