Results 21 to 30 of about 2,944 (214)
The Hot Main Kuiper Belt Size Distribution from OSSOS
The Astrophysical Journal Letters, 2023 Using the absolute detection calibration and abundant detections of the Outer Solar System Origins Survey project, we provide population measurements for the main Kuiper Belt.
Jean-Marc Petit +6 more
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, 2023 During the formation of our solar system, a large number of planetesimals were ejected into interstellar space by gravitational encounters with the planets. Debris disks observations and numerical simulations indicate that many other planetary systems, now known to be quite common, would have undergone a similar dynamical clearing process.
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The Formation of Planetesimals
The Astrophysical Journal, 1973 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. These dust particles settle into a thin disk which is gravitationally unstable. A first generation of planetesimals, whose radii range up to about 0.1 km, form from the dust disk by direct ...
Peter Goldreich, William R. Ward
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From stellar nebula to planetesimals [PDF]
Astronomy & Astrophysics, 2014 Solar and extrasolar comets and extrasolar planets are the subject of numerous studies in order to determine their chemical composition and internal structure. In the case of planetesimals, their compositions are important as they govern in part the composition of future planets.
Marboeuf, U. +4 more
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APPLICATION OF GAS DYNAMICAL FRICTION FOR PLANETESIMALS. I. EVOLUTION OF SINGLE PLANETESIMALS [PDF]
The Astrophysical Journal, 2015 Accepted to ...
Evgeni Grishin, Hagai B. Perets
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PLANETESIMAL DISK MICROLENSING [PDF]
The Astrophysical Journal, 2009 Motivated by debris disk studies, we investigate the gravitational microlensing of background starlight by a planetesimal disk around a foreground star. We use dynamical survival models to construct a plausible example of a planetesimal disk and study its microlensing properties using established ideas of microlensing by small bodies. When a solar-type
Kevin Heng +2 more
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High-resolution Study of Planetesimal Formation by Gravitational Collapse of Pebble Clouds
The Astrophysical Journal, 2023 Planetary embryos are built through the collisional growth of 10–100 km-sized objects called planetesimals, a formerly large population of objects, of which asteroids, comets, and Kuiper Belt objects represent the leftovers from planet formation in our ...
Brooke Polak, Hubert Klahr
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CONGLOMERATION OF KILOMETER-SIZED PLANETESIMALS [PDF]
The Astrophysical Journal, 2015 We study the efficiency of forming large bodies, starting from a sea of equal-sized planetesimals. This is likely one of the earlier steps of planet formation and relevant for the formation of the asteroid belt, the Kuiper belt and extra-solar debris disks.
Yoram Lithwick +3 more
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Evidence for the Disruption of a Planetary System During the Formation of the Helix Nebula
The Astronomical Journal, 2022 The persistence of planetary systems after their host stars evolve into their post-main-sequence phase is poorly constrained by observations. Many young white dwarf systems exhibit infrared excess emission and/or spectral absorption lines associated with
Jonathan P. Marshall +7 more
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Modelling of compaction in planetesimals [PDF]
Astronomy & Astrophysics, 2014 Aims. Compaction of initially porous material prior to melting is an important process that has influenced the interior structure and the thermal evolution of planetesimals in their early history. On the one hand, compaction decreases the porosity resulting in a reduction of the radius and on the other hand, the loss of porosity results in an increase ...
Wladimir Neumann +3 more
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