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101 papers · 1 filter
Helium in natal HII regions: the origin of the X-ray absorption in gamma-ray burst afterglows
Darach Watson, Tayyaba Zafar, Anja C. Andersen +8
Soft X-ray absorption in excess of Galactic is observed in the afterglows of most gamma-ray bursts (GRBs), but the correct solution to its origin has not been arrived at after more…
CLASH: The enhanced lensing efficiency of the highly elongated merging cluster MACS J0416.1-2403
A. Zitrin, M. Meneghetti, K. Umetsu +21
We perform a strong-lensing analysis of the merging galaxy cluster MACS J0416.1-2403 (M0416; z=0.42) in recent CLASH/HST observations. We identify 70 new multiple images and candid…
Quantum law of rare events for systems with Bose-Einstein statistics
Dmitri Sokolovski
In classical physics the joint probability of a number of individually rare independent events is given by the Poisson distribution. It describes, for example, unidirectional trans…
Ferromagnetic coupling of mononuclear Fe centers in a self-assembled metal-organic network on Au(111)
T. R. Umbach, M. Bernien, C. F. Hermanns +7
The magnetic state and magnetic coupling of individual atoms in nanoscale structures relies on a delicate balance between different interactions with the atomic-scale surrounding.…
Spin dynamics in tunneling decay of a metastable state
Yue Ban, E. Ya. Sherman
We analyze spin dynamics in the tunneling decay of a metastable localized state in the presence of spin-orbit coupling. We find that the spin polarization at short time scales is a…
A direct solver with reutilization of previously-computed LU factorizations for h-adaptive finite element grids with point singularities
Maciej Paszynski, Victor Calo, David Pardo
This paper describes a direct solver algorithm for a sequence of finite element meshes that are h-refined towards one or several point singularities. For such a sequence of grids,…