Results 1 to 10 of about 4,679 (191)
Metallicity, planetary formation and migration [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 Recent observations show a clear correlation between the probability of hosting a planet and the metallicity of the parent star. Since radial velocity surveys are biased, however, towards detecting planets with short orbital periods, the probability-metallicity correlation could merely reflect a dependence of migration rates on metallicity.
Mario Livio, J. E. Pringle
openalex +4 more sources
PLANETARY MIGRATION IN EVOLVING PLANETESIMAL DISKS [PDF]
International Journal of Modern Physics D, 2003 In the current paper, we further improved the model for the migration of planets introduced and extended to time-dependent planetesimal accretion disks by Del Popolo. In the current study, the assumption of Del Popolo, that the surface density in planetesimals is proportional to that of gas, is relaxed. In order to obtain the evolution of planetesimal
I. S. Yeşilyurt +2 more
openalex +6 more sources
Planetary migration to large radii [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Accepted for publication in ...
Rebecca G. Martin +3 more
openalex +5 more sources
Is planetary migration inevitable?
, 2003 According to current theories, tidal interactions between a disk and an embedded planet may lead to the rapid migration of the protoplanet on a timescale shorter than the disk lifetime or estimated planetary formation timescales. Therefore, planets can form only if there is a mechanism to hold at least some of the cores back on their way in.
Caroline Terquem
openalex +6 more sources
Type I Planetary Migration with MHD Turbulence [PDF]
The Astrophysical Journal, 2004 Submitted to ApJ on July 29th, 2003.
Gregory Laughlin +2 more
openalex +4 more sources
Planetary migration in gaseous protoplanetary disks [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractTides come from the fact that different parts of a system do not fall in exactly the same way in a non-uniform gravity field. In the case of a protoplanetary disk perturbed by an orbiting, prograde protoplanet, the protoplanet tides raise a wake in the disk which causes the orbital elements of the planet to change over time.
F. Masset
openalex +2 more sources
Stopping inward planetary migration by a toroidal magnetic field [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 We calculate the linear torque exerted by a planet on a circular orbit on a disc containing a toroidal magnetic field. All fluid perturbations are singular at the so--called magnetic resonances, where the Doppler shifted frequency of the perturbation matches that of a slow MHD wave propagating along the field line.
Caroline Terquem
openalex +4 more sources
Saving Planetary Systems: Dead Zones and Planetary Migration [PDF]
The Astrophysical Journal, 2007 The tidal interaction between a disk and a planet leads to the planet's migration. A long-standing question regarding this mechanism is how to stop the migration before planets plunge into their central stars. In this paper, we propose a new, simple mechanism to significantly slow down planet migration, and test the possibility by using a hybrid ...
Soko Matsumura +2 more
openalex +7 more sources
RESONANT REMOVAL OF EXOMOONS DURING PLANETARY MIGRATION [PDF]
The Astrophysical Journal, 2016 ABSTRACT Jupiter and Saturn play host to an impressive array of satellites, making it reasonable to suspect that similar systems of moons might exist around giant extrasolar planets. Furthermore, a significant population of such planets is known to reside at distances of several Astronomical Units (AU), leading to speculation that some ...
Christopher Spalding +2 more
openalex +7 more sources
Percolative sulfide core formation in oxidized planetary bodies [PDF]
Nature CommunicationsModels of planetary core formation traditionally involve the fractionation of Fe,Ni-metal melts from silicate mantles after extensive silicate melting.
Samuel D. Crossley +9 more
doaj +2 more sources