搜索结果: 1-15 共查到“天文学 Fragmentation”相关记录19条 . 查询时间(0.109 秒)
PLANETESIMALS TO PROTOPLANETS. I. EFFECT OF FRAGMENTATION ON TERRESTRIAL PLANET FORMATION
n-body simulations planetary systems solar system
2015/12/25
We present results from a dozen direct N-body simulations of terrestrial planet formation with various initial conditions. In order to increase the realism of our simulations and investigate theeffect...
Catastrophic disruption of asteroids and family formation:a review of numerical simulations including both fragmentation and gravitational reaccumulations
Asteroids composition Asteroids dynamics Collisional physics Impact processes
2015/12/25
In the last few years, thanks to the development of sophisticated numerical codes, a major breakthrough has been achieved in our understanding of the processes involved in small bodycollisions. In thi...
Formation of Asteroid Families by Catastrophic Disruption:Simulations with Fragmentation and Gravitational Reaccumulation
asteroids dynamics planetesimals resonances surfaces asteroids
2015/12/25
This paper builds on preliminary work in which numerical simulations of the collisional disruption of large asteroids (represented by the Eunomia and Koronis family parent bodies) were performed and w...
Dense core formation by fragmentation of velocity-coherent filaments in L1517
Stars: formation - ISM: clouds - molecules - kinematics and dynamics - structure - Radio lines: ISM
2011/9/28
Context. Low-mass star-forming cores differ from their surrounding molecular cloud in turbulence, shape, and density structure. Aims. We aim to understand how dense cores form out of the less dense cl...
The Jeans Mass as a Fundamental Measure of Self-Gravitating Disc Fragmentation and Initial Fragment Mass
stars: formation accretion accretion discs methods:analytical
2011/9/28
As a formation route for objects such as giant planets and low-mass stars in protostellar discs (as well as stars in AGN discs), theories of self-gravitating disc fragmentation need to be able to pred...
The Interplay of Magnetic Fields, Fragmentation and Ionization Feedback in High-Mass Star Formation
Magnetic Fields Fragmentation High-Mass Star Formation
2011/1/13
Massive stars disproportionately influence their surroundings. How they form has only started to become clear recently through radiation gas dynamical simulations. However, until now, no simulation ha...
Non-convergence of the critical cooling timescale for fragmentation of self-gravitating discs
accretion accretion discs protoplanetary discs planets and satellites
2010/11/10
We carry out a resolution study on the fragmentation boundary of self-gravitating discs. We perform three-dimensional Smoothed Particle Hydrodynamics simulations of discs to determine whether the crit...
Is protostellar heating sufficient to halt fragmentation? A case study of the massive protocluster G8.68-0.37
stars formation — submillimeter — stars: winds outflows — ISM clouds — stars
2010/11/11
If star formation proceeds by thermal fragmentation and the subsequent gravitational collapse of the individual fragments, how is it possible to form fragments massive enough for O and B stars in a ty...
The Effects of Radiation Feedback on Early Fragmentation and Multiplicity
Radiation Feedback Early Fragmentation
2011/1/10
Forming stars emit a significant amount of radiation into their natal environment. While the importance of radiation feedback from high-mass stars is widely accepted, radiation has generally been igno...
The Formation of Low-Mass Binary Star Systems Via Turbulent Fragmentation
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/7
We characterize the infall rate onto protostellar systems forming in self-gravitating radiation-hydrodynamic simulations. Using two dimensionless parameters to determine disks' susceptability to gravi...
The fragmentation of expanding shells III: Oligarchic accretion and the mass spectrum of fragments
Galaxy Astrophysics (astro-ph.GA)
2010/12/28
We use SPH simulations to investigate the gravitational fragmentation of expanding shells through the linear and non--linear regimes.
Stellar and substellar initial mass function: a model that implements gravoturbulent fragmentation and accretion
Solar and Stellar Astrophysics (astro-ph.SR) Galaxy Astrophysics (astro-ph.GA)
2010/12/28
In this work, we derive the stellar initial mass function (IMF) from the superposition of mass distributions of dense cores, generated through gravoturbulent fragmentation of unstable clumps in molecu...
3D Simulations of the Fragmentation of Photoevaporating Clumps Embedded in a Stellar Wind
3D Simulations Stellar Wind Photoevaporating Clumps Embedded
2009/6/25
3D Simulations of the Fragmentation of Photoevaporating Clumps Embedded in a Stellar Wind。
Numerical simulations of the fragmentation of photoevaporating nonuniform clumps
Numerical simulations photoevaporating fragmentation
2009/6/25
Numerical simulations of the fragmentation of photoevaporating nonuniform clumps。
Numerical Simulations of Collapse and Fragmentation of Magnetized Molecular Cloud Cores -- Formation of Binary
Magnetized Molecular Cloud Cores Formation of Binary
2009/6/16
Numerical Simulations of Collapse and Fragmentation of Magnetized Molecular Cloud Cores -- Formation of Binary。