Zobrazeno 1 - 10
of 2 081
pro vyhledávání: '"Colgate, S A"'
Autor:
Li, H., Arons, J., Bellan, P., Colgate, S., Forest, C., Fowler, K., Goodman, J., Intrator, T., Kronberg, P., Lyutikov, M., Zweibel, E.
In this White Paper, we emphasize the need for and the important role of plasma astrophysics in the studies of formation, evolution of, and feedback by Active Galaxies. We make three specific recommendations: 1) We need to significantly increase the
Externí odkaz:
http://arxiv.org/abs/0902.3469
Publikováno v:
Astrophys.J. 575 (2002) 1151
Despite the importance of the magnetorotational instability (MRI) as a fundamental mechanism for angular momentum transport in magnetized accretion disks, it has yet to be demonstrated in the laboratory. A liquid sodium alpha-omega dynamo experiment
Externí odkaz:
http://arxiv.org/abs/astro-ph/0204299
A magnetic dynamo experiment is under construction at the New Mexico Institute of Mining and Technology. The experiment is designed to demonstrate in the laboratory the alpha-omega magnetic dynamo, which is believed to operate in many rotating and co
Externí odkaz:
http://arxiv.org/abs/astro-ph/0112541
We study the evolution of a magnetic arcade that is anchored to an accretion disk and is sheared by the differential rotation of a Keplerian disk. By including an extremely low external plasma pressure at large distances, we obtain a sequence of axis
Externí odkaz:
http://arxiv.org/abs/astro-ph/0107412
A quantitative analysis of two radio source samples having opposite extremes of ambient gas density leads to important new conclusions about the magnetic energy in the IGM. We conclude that giant sources in rarefied IGM environments, which contain ma
Externí odkaz:
http://arxiv.org/abs/astro-ph/0106281
The powerful narrow jets observed to emanate from many compact accreting objects may arise from the twisting of a magnetic field threading a differentially rotating accretion disk which acts to magnetically extract angular momentum and energy from th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0103330
(abridged) The interpretation of Faraday rotation measure maps of AGNs within galaxy clusters has revealed regions, $\sim 50-100$ kpc, that are populated with large, $\sim 30 \mu$ G magnetic fields. The magnetic energy of these coherent regions is $\
Externí odkaz:
http://arxiv.org/abs/astro-ph/0012484
(abridged) We study the nonlinear evolution of the Rossby wave instability in thin disks using global 2D hydrodynamic simulations. The key questions we are addressing in this paper are: (1) What happens when the instability becomes nonlinear? Specifi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0012479
In earlier work we identified a global, non-axisymmetric instability associated with the presence of an extreme in the radial profile of the key function ${\cal L}(r) \equiv (\Sigma \Omega/\kappa^2) S^{2/\Gamma}$ in a thin, inviscid, nonmagnetized ac
Externí odkaz:
http://arxiv.org/abs/astro-ph/9907279
The lack of our knowledge on how angular momentum is transported in accretion disks around black holes has prevented us from fully understanding their high energy emissions. We briefly highlight some theoretical models, emphasizing the energy flow an
Externí odkaz:
http://arxiv.org/abs/astro-ph/9812418