Long-Lag, Wide-Pulse Gamma-Ray Bursts
- J. Norris, J. Bonnell, D. Kazanas, J. Scargle, J. Hakkila, T. Giblin
- Physics
- 17 March 2005
Currently, the best available probe of the early phase of gamma-ray burst (GRB) jet attributes is the prompt gamma-ray emission, in which several intrinsic and extrinsic variables determine GRB pulse…
The Axisymmetric Pulsar Magnetosphere
- I. Contopoulos, D. Kazanas, C. Fendt
- Physics
- 20 January 1999
We present, for the first time, the structure of the axisymmetric force-free magnetosphere of an aligned rotating magnetic dipole, in the case in which there exists a sufficiently large charge…
Exact vacuum solution to conformal Weyl gravity and galactic rotation curves
- P. Mannheim, D. Kazanas
- Physics
- 15 July 1989
The complete, exact exterior solution for a static, spherically symmetric source in locally conformal invariant Weyl gravity is presented. The solution includes the familiar exterior Schwarzschild…
Fermi gamma-ray imaging of a radio galaxy.
- A. Abdo, M. Ackermann, D. Kazanas
- PhysicsScience
- 7 May 2010
These measurements provide gamma-ray constraints on the magnetic field and particle energy content in radio galaxy lobes, as well as a promising method to probe the cosmic relic photon fields.
Thermal Instability and Photoionized X-Ray Reflection in Accretion Disks
- S. Nayakshin, D. Kazanas, T. Kallman
- Physics
- 21 September 1999
The self-consistent density determination makes evident the presence of a thermal ionization instability well known in the context of quasar emission line studies, and proposes that future X-ray reflection calculations should always utilize hydrostatic balance in order to provide a reliable interpretation ofX-ray spectra of active galactic nuclei and galactic black hole candidates.
Science with the Cherenkov Telescope Array
- The Cherenkov Telescope Array Consortium B.S. Acharya, I. Agudo, J. Zorn
- Physics
- 23 September 2017
The Cherenkov Telescope Array, CTA, will be the major global observatory for very high energy gamma-ray astronomy over the next decade and beyond. The scientific potential of CTA is extremely broad:…
Supernova bounds on the dark photon using its electromagnetic decay
- D. Kazanas, R. Mohapatra, S. Nussinov, V. Teplitz, Yong-chao Zhang
- Physics
- 1 October 2014
GAMMA-RAY EMISSION IN DISSIPATIVE PULSAR MAGNETOSPHERES: FROM THEORY TO FERMI OBSERVATIONS
- C. Kalapotharakos, A. Harding, D. Kazanas
- Physics
- 14 October 2013
We compute the patterns of γ-ray emission due to curvature radiation in dissipative pulsar magnetospheres. Our ultimate goal is to construct macrophysical models that are able to reproduce the…
Multiwavelength Observations of a Dramatic High-Energy Flare in the Blazar 3C 279
The blazar 3C 279, one of the brightest identified extragalactic objects in the γ-ray sky, underwent a large (factor of ~10 in amplitude) flare in γ-rays toward the end of a 3 week pointing by…
Exact Expressions for the Critical Mach Numbers in the Two-Fluid Model of Cosmic-Ray-modified Shocks
- P. Becker, D. Kazanas
- Physics
- 2 January 2001
The acceleration of relativistic particles due to repeated scattering across a shock wave remains the most attractive model for the production of energetic cosmic rays. This process has been analyzed…
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