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Long-Lag, Wide-Pulse Gamma-Ray Bursts
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…
Fermi gamma-ray imaging of a radio galaxy.
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.
Exact vacuum solution to conformal Weyl gravity and galactic rotation curves
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…
Thermal Instability and Photoionized X-Ray Reflection in Accretion Disks
- S. Nayakshin, D. Kazanas, Timothy R. Kallman NASA's Goddard Space Flight Center, Nasnrc Research Associate
- Physics, Computer Science
- 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, +578 authors J. Zorn
- 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:…
Decelerating Flows in TeV Blazars: A Resolution to the BL Lac -- FR I Unification Problem
TeV emission from BL Lacertae (BL) objects i s commonly modeled as Synchrotron-Self Compton (SSC) radiation from relativistically moving homogeneous plasma blobs. In the context of these models, the…
A Method for Localizing Energy Dissipation in Blazars Using Fermi Variability
The distance of a Fermi-detected blazar γ-ray emission site from a supermassive black hole is a matter of active debate. Here we present a method for testing if the GeV emission of powerful blazars…
Exact Expressions for the Critical Mach Numbers in the Two-Fluid Model of Cosmic-Ray-modified Shocks
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…
Multiwavelength observations of short-timescale variability in NGC 4151 .4. Analysis of multiwavelength continuum variability
For pt.III see ibid., vol.470, no.1, p.349-63 (1996). Combines data from the three preceding papers in order to analyze the multi wave-band variability and spectral energy distribution of the Seyfert…
Timing Noise Properties of GRO J0422+32
OSSE observed the transient black hole candidate GRO J0422+32 (XN Per 92) between 1992 Aug 11 and 1992 Sep 17. High time resolution data were obtained in several energy bands over the 35-600 keV…