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78 papers · 1 filter
The Giant X-ray Flare of GRB 050502B: Evidence for Late-Time Internal Engine Activity
A. D. Falcone, D. N. Burrows, D. Lazzati +28
Until recently, X-ray flares during the afterglow of gamma ray bursts (GRBs) were a rarely detected phenomenon, thus their nature is unclear. During the afterglow of GRB 050502B, t…
Understanding the superfluid phase diagram in trapped Fermi gases
Qijin Chen, C. A. Regal, M. Greiner +2
Trapped ultracold Fermi gases provide a system that can be tuned between the BCS and BEC regimes by means of a magnetic-field Feshbach resonance. Condensation of fermionic atom pai…
Released momentum distribution of a Fermi gas in the BCS-BEC crossover
M. L. Chiofalo, S. Giorgini, M. Holland
We develop a time-dependent mean-field theory to investigate the released momentum distribution and the released energy of an ultracold Fermi gas in the BCS-BEC crossover after the…
Thick fireballs and the steep decay in the early X-ray afterglow of gamma-ray bursts
Davide Lazzati, Mitchell C. Begelman
We study the early afterglows of gamma-ray bursts produced by geometrically thick fireballs, following the development of the external shock as energy is continually supplied to th…
Viscosity in cosmological simulations of clusters of galaxies
M. Brüggen, M. Ruszkowski
The physics of the intracluster medium, in particular the values for the thermal conductivity and the viscosity are largely unknown and subject to an ongoing debate. Here, we study…
Iron depletion in the hot bubbles in planetary nebulae
Leonid N. Georgiev, Michael G. Richer, Anabel Arrieta +1
We have searched for the emission from \fex and \fexiv that is expected from the gas emitting in diffuse X-rays in \bd, NGC 6543, NGC 7009, and NGC 7027. Neither line was detected…