Results 101 to 110 of about 11,561 (252)
Accretion Bursts in Young Intermediate-mass Stars Make Planet Formation Challenging
The Astrophysical JournalWe investigate the occurrence of accretion bursts, dust accumulation, and the prospects for planetesimal formation in a gravitationally unstable magnetized protoplanetary disk (PPD) with globally suppressed but episodically triggered magnetorotational ...
Indrani Das +2 more
doaj +1 more source
The Multifaceted Planetesimal Formation Process [PDF]
, 2014 Accumulation of dust and ice particles into planetesimals is an important step in the planet formation process. Planetesimals are the seeds of both terrestrial planets and the solid cores of gas and ice giants forming by core accretion. Left-over planetesimals in the form of asteroids, trans-Neptunian objects and comets provide a unique record of the ...
Johansen, Anders +5 more
openaire +3 more sources
The Astronomical JournalIn the Nice model of Solar System formation, Uranus and Neptune undergo an orbital upheaval, sweeping through a planetesimal disk. The region of the disk from which material is accreted by the ice giants during this phase of their evolution has not ...
Eva Zlimen +2 more
doaj +1 more source
A quantification of hydrodynamical effects on protoplanetary dust growth
, 2013 Context. The growth process of dust particles in protoplanetary disks can be modeled via numerical dust coagulation codes. In this approach, physical effects that dominate the dust growth process often must be implemented in a parameterized form.
Dullemond, C. P. +3 more
core +1 more source
From Dust To Planetesimal: The Snowball Phase ?
, 2010 The standard model of planet formation considers an initial phase in which planetesimals form from a dust disk, followed by a phase of mutual planetesimal-planetesimal collisions, leading eventually to the formation of planetary embryos.
Ge, Jian +4 more
core +2 more sources
Dust Coagulation Assisted by Streaming Instability in Protoplanetary Disks
The Astrophysical JournalThe streaming instability is a promising mechanism for planetesimal formation. The instability can rapidly form dense clumps that collapse self-gravitationally, which is efficient for large dust grains with Stokes number of the order of 0.1.
Ryosuke T. Tominaga, Hidekazu Tanaka
doaj +1 more source
Accretion and Destruction of Planetesimals in Turbulent Disks [PDF]
, 2008 Shigeru Ida +2 more
openalex +1 more source
FORMING PLANETESIMALS BY GRAVITATIONAL INSTABILITY. I. THE ROLE OF THE RICHARDSON NUMBER IN TRIGGERING THE KELVIN-HELMHOLTZ INSTABILITY [PDF]
, 2010 Aaron T. Lee +3 more
openalex +1 more source
Streaming Instabilities in Accreting Protoplanetary Disks: A Parameter Study
The Astrophysical JournalThe streaming instability (SI) is currently the leading candidate for triggering planetesimal formation in protoplanetary disks. Recently, a novel variation, the “azimuthal-drift” streaming instability (AdSI), was discovered in disks exhibiting laminar ...
Shiang-Chih Wang, Min-Kai Lin
doaj +1 more source
Selective Aggregation Experiments on Planetesimal Formation and Mercury-Like Planets
Geosciences, 2018 Much of a planet’s composition could be determined right at the onset of formation. Laboratory experiments can constrain these early steps. This includes static tensile strength measurements or collisions carried out under Earth’s gravity and
Gerhard Wurm
doaj +1 more source