Results 11 to 20 of about 11,561 (252)
Planetesimal disk evolution driven by embryo-planetesimal gravitational scattering [PDF]
The Astronomical Journal, 2002 The process of gravitational scattering of planetesimals by a massive protoplanetary embryo is explored theoretically. We propose a method to describe the evolution of the disk surface density, eccentricity, and inclination caused by the embryo ...
Goldreich P. +7 more
core +5 more sources
Kozai effect on planetesimal accretion in highly inclined binaries [PDF]
EPJ Web of Conferences, 2011 Planet formation in highly inclined binaries is a complex issue. The Kozai mechanism plays an important role in this situation, since it will lead to high eccentricity and high relative impact velocity of planetesimals, thus hinder the planetesimal ...
Zhou J.-L., Lin D.N.C., Zhao G.
doaj +2 more sources
High-resolution Study of Planetesimal Formation by Gravitational Collapse of Pebble Clouds [PDF]
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
doaj +2 more sources
Growth and thermal evolution of icy planetesimals
Earth, Planets and SpaceIcy planetesimals are thought to contribute to the volatile inventory of terrestrial planets and serve as building blocks of icy bodies in the outer Solar System.
Jun Kimura +3 more
doaj +2 more sources
Planetesimal Population Synthesis: Pebble Flux-regulated Planetesimal Formation [PDF]
The Astrophysical Journal, 2019 Abstract We propose an expression for a local planetesimal formation rate proportional to the instantaneous radial pebble flux. The result—a radial planetesimal distribution—can be used as an initial condition to study the formation of planetary embryos.
Christian T. Lenz +2 more
openaire +3 more sources
Astronomy & Astrophysics, 2023 Planetesimals are born fragile and are subject to destruction by wind erosion as they move through the gas of a protoplanetary disk. In microgravity experiments, we determined the shear stress necessary for erosion of a surface consisting of 1 mm dust pebbles down to 1 Pa ambient pressure. This is directly applicable to protoplanetary disks.
L. Schönau +7 more
openaire +3 more sources
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
Heng, Kevin, Keeton, Charles R.
openaire +2 more sources
Binary Formation in Planetesimal Disks. I. Equal Mass Planetesimals [PDF]
Publications of the Astronomical Society of Japan, 2011 As of April 2010, 48 TNO (trans-Neptunian Object) binaries have been found. This is about 6% of known TNOs. However, in previous theoretical studies of planetary formation in the TNO region, the effect of binary formation has been neglected. TNO binaries can be formed through a variety of mechanisms, such as a three-body process, dynamical friction on ...
Daisaka, Junko K. +2 more
openaire +2 more sources
Planetesimal Formation by the Gravitational Instability of Dust Ring Structures
The Astrophysical Journal, 2023 We investigate the gravitational instability (GI) of dust ring structures and the formation of planetesimals by their gravitational collapse. The normalized dispersion relation of a self-gravitating ring structure includes two parameters that are related
Sanemichi Z. Takahashi +2 more
doaj +1 more source
Frontiers in Earth Science, 2018 Core formation has left a lasting geochemical signature on the Earth. In order to constrain the composition of the Earth we must fully understand the processes by which newly formed Earth, and the bodies which accreted to it, differentiated.
Madeleine T. L. Berg +6 more
doaj +1 more source