Search Results - "Weidenschilling, S."

Accretion of the asteroids: Implications for their thermal evolution by Weidenschilling, S. J.

“…Thermal models of asteroids generally assume that they accreted either instantaneously or over an extended interval with a prescribed growth rate. It is…”
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Initial sizes of planetesimals and accretion of the asteroids by Weidenschilling, S.J.

“…► The present asteroid belt preserves a record of an early population with an excess of bodies of size ∼ 100 km. ► Simulations of accretion from km-sized…”
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Collisional and Luminosity Evolution of a Debris Disk: The Case of HD 12039 by Weidenschilling, S. J

“…Extrasolar debris disks that are bright enough to be observed are dense enough to be collision-dominated; i.e., the small grains that produce their infrared…”
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Eccentric Extrasolar Planets: The Jumping Jupiter Model by Marzari, F., Weidenschilling, S.J.

“…Most extrasolar planets discovered to date are more massive than Jupiter, in surprisingly small orbits (semimajor axes less than 3 AU). Many of these have…”
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On the Origin of Binary Transneptunian Objects by Weidenschilling, S.J.

“…The observed transneptunian binaries, with components of comparable mass and large separations, cannot be the result of collisions in the present dynamical…”
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Accretion of planetary embryos in the inner and outer solar system by Weidenschilling, S J

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Gravitational scattering as a possible origin for giant planets at small stellar distances by Weidenschilling, Stuart J, Marzari, Francesco

“…The recent discoveries of massive planetary companions orbiting several solar-type stars pose a conundrum. Conventional models for the formation of giant…”
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Models of particle layers in the midplane of the solar nebula by Weidenschilling, S.J.

“…In the absence of global turbulence, solid particles in the solar nebula tend to settle into a thin layer in the central plane. Shear between this layer and…”
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Jumping Jupiters in Binary Star Systems by Marzari, F, Weidenschilling, S. J, Barbieri, M, Granata, V

“…We investigate the outcomes of the dynamical interaction of Jupiter-mass planets orbiting the central star in a binary system. These systems are unstable and…”
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Growth and form of planetary seedlings: results from a microgravity aggregation experiment by Blum, J, Wurm, G, Kempf, S, Poppe, T, Klahr, H, Kozasa, T, Rott, M, Henning, T, Dorschner, J, Schräpler, R, Keller, H U, Markiewicz, W J, Mann, I, Gustafson, B A, Giovane, F, Neuhaus, D, Fechtig, H, Grün, E, Feuerbacher, B, Kochan, H, Ratke, L, El Goresy, A, Morfill, G, Weidenschilling, S J, Schwehm, G, Metzler, K, Ip, W H

“…The outcome of the first stage of planetary formation, which is characterized by ballistic agglomeration of preplanetary dust grains due to Brownian motion in…”
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Formation of the cores of the outer planets by WEIDENSCHILLING, S. J

“…Issue Title: The Outer Planets and their Moons The formation of the giant planets seems to be best explained by accretion of planetesimals to form massive…”
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Radial drift of particles in the solar nebula: implications for planetesimal formation by Weidenschilling, S.J

“…For standard cosmic abundances of heavy elements, a layer of small particles in the central plane of the solar nebula cannot attain the critical density for…”
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The Origin of Chondrules at Jovian Resonances by Weidenschilling, S. J., Marzari, F., Hood, L. L.

“…Isotopic dating indicates that chondrules were produced a few million years after the solar nebula formed. This timing is incompatible with dynamical lifetimes…”
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The Origin of Comets in the Solar Nebula: A Unified Model by Weidenschilling, S.J.

“…Comets originated as icy planetesimals in the outer Solar System, as shown by dynamical studies and direct observation of objects in the Kuiper disk. Their…”
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The period of rotation, shape, density, and homogeneous surface color of the Centaur 5145 Pholus by Tegler, S.C., Romanishin, W., Consolmagno, G.J., Rall, J., Worhatch, R., Nelson, M., Weidenschilling, S.

“…We present optical photometry of the Centaur 5145 Pholus during 2003 May and 2004 April using the facility CCD camera on the 1.8-m Vatican Advanced Technology…”
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Origin of cometary nuclei as 'rubble piles' by Weidenschilling, S. J

“…Attempts to explain the formation of comets in the outer solar system have emphasized either collisional coagulation or gravitational collapse of a layer of…”
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The Possibility of Ice on the Moon by Weidenschilling, S. J., Nozette, S., Shoemaker, E. M., Spudis, P., Lichtenberg, C. L., Stacy, N. J. S., Campbell, D. B., Ford, P. G.

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Can Gravitational Instability Form Planetesimals? by Weidenschilling, S.J.

“…Gravitational instability of a particle layer in the solar nebula is inhibited by effects of the nebular gas. Particles must grow to at least meter size in…”
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The distribution of mass in the planetary system and solar nebula by Weidenschilling, S. J.

“…A model 'solar nebula' is constructed by adding the solar complement of light elements to each planet, using recent models of planetary compositions…”
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Aerodynamics of solid bodies in the solar nebula by Weidenschilling, S. J.

“…In a centrally condensed solar nebula, the pressure gradient in the gas causes the nebula to rotate more slowly than the free orbital velocity. Drag forces…”
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