Search Results - "Morsony, Brian J."
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Late Time Afterglow Observations Reveal a Collimated Relativistic Jet in the Ejecta of the Binary Neutron Star Merger GW170817
Published in Physical review letters (13-06-2018)“…The binary neutron star (BNS) merger GW170817 was the first astrophysical source detected in gravitational waves and multiwavelength electromagnetic radiation…”
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Suppression of AGN-driven Turbulence by Magnetic Fields in a Magnetohydrodynamic Model of the Intracluster Medium
Published in The Astrophysical journal (20-04-2018)“…We investigate the role of active galactic nucleus (AGN) feedback in turbulent heating of galaxy clusters. Specifically, we analyze the production of…”
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PHOTOSPHERIC EMISSION AS THE DOMINANT RADIATION MECHANISM IN LONG-DURATION GAMMA-RAY BURSTS
Published in The Astrophysical journal (10-03-2013)“…We present the results of a set of numerical simulations of long-duration gamma-ray burst jets associated with massive, compact stellar progenitors. The…”
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THREE-DIMENSIONAL SIMULATIONS OF LONG DURATION GAMMA-RAY BURST JETS: TIMESCALES FROM VARIABLE ENGINES
Published in The Astrophysical journal (01-08-2016)“…ABSTRACT Gamma-ray burst (GRB) light curves are characterized by marked variability, each showing unique properties. The origin of this variability, at least…”
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THREE-DIMENSIONAL ADAPTIVE MESH REFINEMENT SIMULATIONS OF LONG-DURATION GAMMA-RAY BURST JETS INSIDE MASSIVE PROGENITOR STARS
Published in The Astrophysical journal (10-04-2013)“…We present the results of special relativistic, adaptive mesh refinement, 3D simulations of gamma-ray burst jets expanding inside a realistic stellar…”
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Photospheric emission from long-duration gamma-ray bursts powered by variable engines
Published in Monthly notices of the Royal Astronomical Society (11-08-2014)“…We present the results of a set of numerical simulations of long-duration gamma-ray burst jets aimed at studying the effect of a variable engine on the peak…”
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Temporal and Angular Properties of Gamma-Ray Burst Jets Emerging from Massive Stars
Published in The Astrophysical journal (10-08-2007)“…We study the long-term evolution of relativistic jets in collapsars and examine the effects of viewing angle on the subsequent gamma-ray bursts. We carry out a…”
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Very High Efficiency Photospheric Emission in Long-Duration γ-Ray Bursts
Published in The Astrophysical journal (20-07-2009)“…We numerically analyze the evolution of a long-duration gamma-ray burst jet as it leaves the progenitor star and propagates to the photospheric radius, where…”
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UNIFYING THE ZOO OF JET-DRIVEN STELLAR EXPLOSIONS
Published in The Astrophysical journal (01-05-2012)“…We present a set of numerical simulations of stellar explosions induced by relativistic jets emanating from a central engine sitting at the center of compact,…”
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The afterglow of GW170817 from every angle: prospects for detecting the afterglows of binary neutron star mergers
Published in Monthly notices of the Royal Astronomical Society (01-09-2024)“…ABSTRACT To date GW170817, produced by a binary neutron star (BNS) merger, is the only gravitational wave (GW) event with an electromagnetic counterpart. It…”
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Swimming against the current: simulations of central AGN evolution in dynamic galaxy clusters
Published in Monthly notices of the Royal Astronomical Society (01-09-2010)“…We present a series of three-dimensional hydrodynamical simulations of central active galactic nuclei (AGN)-driven jets in a dynamic, cosmologically evolved…”
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Gamma-ray burst jet dynamics and their interaction with the progenitor star
Published in Philosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences (15-05-2007)“…The association of at least some long gamma-ray bursts with type Ic supernova explosions has been established beyond reasonable doubt. Theoretically, the…”
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Short-duration Gamma-ray Bursts From Off-axis Collapsars
Published in The Astrophysical journal (01-07-2010)“…We present two-dimensional (2D) high-resolution hydrodynamic simulations of the relativistic outflows of long-duration gamma-ray burst (GRB) progenitors. We…”
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14
G2 and Sgr A: A Cosmic Fizzle at the Galactic Center
Published in The Astrophysical journal (01-07-2017)“…We carry out a series of simulations of G2-type clouds interacting with the black hole at the galactic center, to determine why no large changes in the…”
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Simulations of bent-double radio sources in galaxy groups
Published in Monthly notices of the Royal Astronomical Society (01-05-2013)“…Bent-double radio sources have been used as a probe to measure the density of intergalactic gas in galaxy groups. We carry out a series of high-resolution,…”
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The Origin and Propagation of Variability in the Outflows of Long-duration Gamma-ray Bursts
Published in The Astrophysical journal (01-11-2010)“…We present the results of hydrodynamical simulations of gamma-ray burst (GRB) jets propagating through their stellar progenitor material and subsequently…”
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Modelling increased metal production in galaxy clusters with pair-instability supernovae
Published in Monthly notices of the Royal Astronomical Society (01-07-2014)“…Galaxy clusters contain much more metal per star, typically three times as much, than is produced in normal galaxies. We set out to determine what changes are…”
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High-efficiency Photospheric Emission of Long-duration Gamma-ray Burst Jets: The Effect of the Viewing Angle
Published in The Astrophysical journal (01-05-2011)“…We present the results of a numerical investigation of the spectra and light curves of the emission from the photospheres of long-duration gamma-ray burst…”
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Jitter radiation in gamma-ray bursts and their afterglows: emission and self-absorption
Published in Monthly notices of the Royal Astronomical Society (01-05-2008)“…Relativistic electrons moving into a highly tangled magnetic field emit jitter radiation. We present a detailed computation of the jitter radiation spectrum,…”
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Jitter radiation images, spectra and light curves from a relativistic spherical blastwave
Published in Monthly notices of the Royal Astronomical Society (01-02-2009)“…We consider radiation emitted by the jitter mechanism in a Blandford–McKee self-similar blastwave. We assume the magnetic field configuration throughout the…”
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