Now showing items 1-10 of 10
LETTER: The Life and Times of Extremal Black Holes
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 2000-11)
Charged extremal black holes cannot fully evaporate through the Hawking effect and are thus long lived. Over their lifetimes, these black holes take part in a variety of astrophysical processes, including many that lead ...
Lithopanspermia in Star-Forming Clusters
(Mary Ann Liebert, Inc., publishers, 2005-08-01)
This paper considers the lithopanspermia hypothesis in star-forming groups and clusters, where the chances of biological material spreading from one solar system to another is greatly enhanced (relative to action in the ...
Nonlinear stationary waves and solitary waves in fluid systems with long-range forces
(Elsevier, 1993-11-15)
We study a class of nonlinear model equations which represent one-dimensional fluid systems with long range forces (such as gravity). We present elementary theorems which constrain the allowed types of stationary wave and ...
Astronomical Engineering: A Strategy For Modifying Planetary Orbits
(Kluwer Academic Publishers; Springer Science+Business Media, 2001-03)
The Sun's gradual brightening will seriously compromise the Earth'sbiosphere within ∼ 10 9 years. If Earth's orbit migrates outward,however, the biosphere could remain intact over the entiremain-sequence lifetime of the ...
Protostellar Disk Formation and Early Evolution
(Kluwer Academic Publishers; Springer Science+Business Media, 2000-03)
This contribution describes the formation of circumstellar disks and their earliest evolutionary phases when self-gravity in the disk plays a crucial role in eliciting the transport of mass and angular momentum. We first ...
The asymptotic form of cosmic structure: Small-scale power and accretion history
(Univ Chicago Press, 2007-08-10)
We explore the effects of small-scale structure on the formation and equilibrium of dark matter halos in a universe dominated by vacuum energy. We present the results of a suite of four N-body simulations, two with a Lambda ...
The ultimate halo mass in a ?CDM universe
(Blackwell Science Ltd, 2004-10-01)
In the far future of an accelerating ?CDM cosmology, the cosmic web of large-scale structure consists of a set of increasingly isolated haloes in dynamical equilibrium. We examine the approach of collisionless dark matter ...
The asymptotic structure of space-time
(World Scientific Publ Co Pte Ltd, 2003-10)
Astronomical observations strongly suggest that our universe is now accelerating and contains a substantial admixture of dark vacuum energy. Using numerical simulations to study this newly consolidated cosmological model ...
Inflation without inflaton(s)
(IOP Publishing Ltd, 2007-11-01)
We propose a model for early universe cosmology without the need for fundamental scalar fields. Cosmic acceleration and phenomenologically viable reheating of the universe result from a series of energy transitions, where ...
Future evolution of cosmic structure in an accelerating universe
(Univ Chicago Press, 2003-10-20)
Current cosmological data indicate that our universe contains a substantial component of dark vacuum energy that is driving the cosmos to accelerate. We examine the immediate and longer term consequences of this dark energy ...