Journal ArticleDOI
Physics of the Primitive Solar Accretion Disk
A. G. W. Cameron
- Vol. 18, Iss: 1, pp 5-40
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TLDR
The theory of viscous accretion disks developed by Lynden-Bell and Pringle (1974) has been applied to the evolution of the primitive solar nebula as mentioned in this paper, and it was concluded that the late stages of evolution would be dominated by the effects of mass loss from the expansion of a hot disk corona into space.Abstract:
The theory of viscous accretion disks developed by Lynden-Bell and Pringle (1974) has been applied to the evolution of the primitive solar nebula The additional physical input needed to determine the structure of the disk is described A series of calculations was carried out using a steady flow approximation to explore the effects on the disk properties of variations in such parameters as the angular momentum and accretion rate of the infalling material from a collapsing interstellar cloud fragment The more detailed evolutionary calculations involved five cases with various combinations of parameters It was concluded that the late stages of evolution of the disks would be dominated by the effects of mass loss from the expansion of a hot disk corona into space, and the effects of this were included in the evolutionary calculations A new theory of comet formation is formulated upon these results The most important result is the conclusion that the primitive solar accretion disk was repeatedly unstable against axisymmetric perturbations, in which rings would form and collapse upon themselves, with the subsequent formation of giant gaseous protoplanetsread more
Citations
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Journal ArticleDOI
Orbital migration of the planetary companion of 51 Pegasi to its present location
TL;DR: In this paper, the authors show that if the companion is indeed a gas-giant planet, it is extremely unlikely to have formed at its present location, and suggest instead that the planet probably formed by gradual accretion of solids and capture of gas at a much larger distance from the star (∼5 AU), and that it subsequently migrated inwards through interactions with the remnants of the circumstellar disk.
Journal ArticleDOI
Giant Planet Formation by Gravitational Instability
TL;DR: In this paper, an alternative to the favored core accretion hypothesis is examined; gravitational instability in the outer solar nebula leading to giant planet formation is examined, and three-dimensional hydrodynamic calculations of protoplanetary disks show that giant gaseous protoplanets can form with locally isothermal or adiabatic disk thermodynamics.
Journal ArticleDOI
Formation of the Giant Planets
TL;DR: In this paper, the structure of a gaseous envelope surrounding a protoplanet has been investigated in connection with the formation of the giant planets, and the most remarkable result is that a common relation between the core mass and the total mass holds irrespectively of the regions in the solar nebula.
Journal ArticleDOI
Planet-Disk Interaction and Orbital Evolution
Willy Kley,Richard P. Nelson +1 more
TL;DR: In this paper, the authors review current understanding of disk-planet interactions, focusing in particular on physical processes that determine the speed and direction of migration of the planet, and examine the influence of Lindblad and corotation torques as a function of disk properties.
References
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Journal ArticleDOI
The Evolution of viscous discs and the origin of the nebular variables.
Donald Lynden-Bell,J. E. Pringle +1 more
Journal ArticleDOI
On Sound Generated Aerodynamically. II. Turbulence as a Source of Sound
TL;DR: The theory of sound generated aerodynamically is extended by taking into account the statistical properties of turbulent airflows, from which the sound radiated (without the help of solid boundaries) is called aerodynamic noise as mentioned in this paper.
Journal ArticleDOI
The formation of planetesimals.
Peter Goldreich,William R. Ward +1 more
TL;DR: In this paper, four stages in the accretion of planetesimals are described, the initial stage is the condensation of dust particles from the gaseous solar nebula as it cools.
Journal ArticleDOI
The supernova trigger for formation of the solar system
A. G. W. Cameron,J. W. Truran +1 more
TL;DR: In this paper, it was suggested that the explosion of a Type II supernova triggered the collapse of a nearby interstellar cloud and led to the formation of the solar system, and the abundances resulting from nuclear processing of the supernova ejecta were presented.
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