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6 papers · 1 filter
Radio Supernovae: Circum-Stellar Investigation (C.S.I.) of Supernova Progenitor Stars
Christopher J. Stockdale, Kurt W. Weiler, Nino Panagia +8
Prior to explosion, a supernova progenitor slowly loses significant amounts of its hydrogen envelope in a stellar wind. After the explosion, the blastwave interacts with this wind…
Discerning the physical origins of cosmological Gamma-ray bursts based on multiple observational criteria: the cases of z=6.7 GRB 080913, z=8.3 GRB 090423, and some short/hard GRBs
Bing Zhang, Bin-Bin Zhang, Francisco J. Virgili +10
(Abridged) The two high-redshift gamma-ray bursts, GRB 080913 at z=6.7 and GRB 090423 at z=8.3, recently detected by Swift appear as intrinsically short, hard GRBs. They could have…
Radiation from relativistic jets in turbulent magnetic fields
K. -I. Nishikawa, M. Medvedev, B. Zhang +7
Using our new 3-D relativistic electromagnetic particle (REMP) code parallelized with MPI, we have investigated long-term particle acceleration associated with an relativistic elec…
The unusual X-ray light-curve of GRB 080307: the onset of the afterglow?
K. L. Page, R. Willingale, P. T. O'Brien +11
Swift-detected GRB 080307 showed an unusual smooth rise in its X-ray light-curve around 100 seconds after the burst, at the start of which the emission briefly softened. This `hump…
Naked-eye optical flash from GRB 080319B: Tracing the decaying neutrons in the outflow
Yi-Zhong Fan, Bing Zhang, Da-Ming Wei
For an unsteady baryonic gamma-ray burst (GRB) outflow, the fast and slow proton shells collide with each other and produce energetic soft gamma-ray emission. If the outflow has a…
Feedback from central black holes in elliptical galaxies. I: models with either radiative or mechanical feedback but not both
L. Ciotti, J. P. Ostriker, D. Proga
The importance of the radiative feedback from SMBHs at the centers of elliptical galaxies is not in doubt, given the well established relations among electromagnetic output, black…