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The Validity of the Super-Particle Approximation during Planetesimal Formation
planet formation planetesimals N-body simulations convergence accretion disc
2010/3/8
The formation mechanism of planetesimals in protoplanetary discs is hotly debated. Currently, the favoured model involves the accumulation of meter-sized objects within a turbulent disc, followed by a...
On the validity of ideal MHD in the vicinity of stagnation points in the heliosphere and other astrospheres
heliospheric boundaries magnetic fields stagnation points
2009/5/27
The paradigm of ideal MHD is investigated in the vicinity of null points of flows and magnetic fields. These null points determine the location and geometrical shape of the heliopause (or other astrop...
Some Doubts on the Validity of the Foreground Galactic Contribution
Cosmic microwave background—ISM clouds—dust extinction—ISM structure
2009/5/12
The Galactic foreground contamination inCMBRanisotropies,
especially from the dust component, is not easily separable from the cosmological
or extragalactic component. In this paper, some doubts wi...
Some Doubts on the Validity of the Foreground Galactic Contribution
Cosmic microwave background—ISM clouds—dust extinction—ISM structure
2010/9/16
The Galactic foreground contamination inCMBRanisotropies,especially from the dust component, is not easily separable from the cosmological or extragalactic component. In this paper, some doubts will b...