Browsing Open Access Repositories by Author "Papaloizou, John Christopher"
Now showing items 1-11 of 11
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Consequences of tidal interaction between disks and orbiting protoplanets for the evolution of multi-planet systems with architecture resembling that of Kepler 444
Papaloizou, John Christopher (SpringerCelestial Mechanics and Dynamical Astronomy, 2016)We study orbital evolution of multi-planet systems with masses in the terrestrial planet regime induced through tidal interaction with a protoplanetary disk assuming that this is the dominant mechanism for producing orbital ...
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Dynamical tides in exoplanetary systems containing hot Jupiters: Confronting theory and observations
Chernov, SV; Ivanov, PB; Papaloizou, John Christopher (Oxford University PressMonthly Notices of the Royal Astronomical Society, 2017-09-11)We study the effect of dynamical tides associated with the excitation of gravity waves in an interior radiative region of the central star on orbital evolution in observed systems containing hot Jupiters. We consider ...
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In situ accretion of gaseous envelopes on to planetary cores embedded in evolving protoplanetary discs
Coleman, Gavin AL; Papaloizou, John Christopher; Nelson, Richard P (Oxford University PressMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017-09-21)The core accretion hypothesis posits that planets with significant gaseous envelopes accreted them from their protoplanetary discs after the formation of rocky/icy cores. Observations indicate that such exoplanets exist ...
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Local models of astrophysical discs
Latter, Henrik Nils; Papaloizou, John Christopher (Oxford University PressMonthly Notices of the Royal Astronomical Society, 2017-12-01)Local models of gaseous accretion discs have been successfully employed for decades to describe an assortment of small-scale phenomena, from instabilities and turbulence, to dust dynamics and planet formation. For the most ...
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On the energy dissipation rate at the inner edge of circumbinary discs
Terquem, Caroline; Papaloizou, John Christopher (Oxford University PressMonthly Notices of the Royal Astronomical Society, 2016-10-03)We study, by means of numerical simulations and analysis, the details of the accretion process from a disc on to a binary system. We show that energy is dissipated at the edge of a circumbinary disc and this is associated ...
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On the formation of a quasi-stationary twisted disc after a tidal disruption event
Xiang-Gruess, M; Ivanov, PB; Papaloizou, John Christopher (Oxford University PressMonthly Notices of the Royal Astronomical Society, 2016-08-24)We investigate misaligned accretion discs formed after tidal disruption events that occur when a star encounters a supermassive black hole. We employ the linear theory of warped accretion discs to find the shape of a disc ...
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On the orbital evolution of a pair of giant planets in mean motion resonance
André, Q; Papaloizou, John Christopher (Oxford University PressMonthly Notices of the Royal Astronomical Society, 2016-07-04)Pairs of extrasolar giant planets in a mean motion commensurability are common with 2:1 resonance occurring most frequently. Disc–planet interaction provides a mechanism for their origin. However, the time-scale on which ...
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Planet-Disc Interactions and Early Evolution of Planetary Systems
Baruteau, Clément; Crida, Aurélien; Paardekooper, Sijme-Jan; Masset, Frédéric; Guilet, Jérôme; Bitsch, Bertram; Nelson, Richard P; Kley, Wilhelm; Papaloizou, John Christopher
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The Evolution of a Supermassive Retrograde Binary Embedded in an Accretion Disk
Ivanov, PB; Papaloizou, John Christopher; Paardekooper, S.-J; Polnarev, AG (Open Astronomy, 2015-01-01)
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Torsional Alfvén resonances as an efficient damping mechanism for non-radial oscillations in red giant stars
Loi, ST; Papaloizou, John Christopher (Oxford University PressMonthly Notices of the Royal Astronomical Society, 2017-06-01)Stars are self-gravitating fluids in which pressure, buoyancy, rotation and magnetic fields provide the restoring forces for global modes of oscillation. Pressure and buoyancy energetically dominate, while rotation and ...
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Vortices and the saturation of the vertical shear instability in protoplanetary discs
Latter, Henrik Nils; Papaloizou, John Christopher (Monthly Notices of the Royal Astronomical Society, 2018-03-01)