Results 41 to 50 of about 4,977,656 (389)

Tailoring emission spectra by using microcavities

Results in Physics, 2019
We present a theoretical model to describe emission spectrum of an emitter in a micro-cavity. Our model proposes that the spectrum in a metal micro-cavity depends on the product of the emission spectrum in free space and the local density of states (LDOS)
Muhammad Hanif Ahmed Khan Khushik, Chun Jiang   +1 more
doaj   +1 more source

Relativistic Broadening of Iron Emission Lines in a Sample of AGN

, 2009
We present a uniform X-ray spectral analysis of eight type-1 active galactic nuclei (AGN) that have been previously observed with relativistically broadened iron emission lines.
Behar, Bevington, Brandt, Brenneman, Brenneman, Brenneman, Christopher S. Reynolds, Crenshaw, Crenshaw, Dewangan, Dovčiak, Fabian, George, Gilli, Guainazzi, Haardt, Kaspi, Kaspi, Kaspi, Laura W. Brenneman, Magdziarz, Mason, Mason, Matt, McHardy, Miller, Nandra, Narayan, Pounds, Reeves, Reeves, Reynolds, Reynolds, Ross, Turner, Turner, Turner, Uttley, Weaver, Weaver, Yaqoob   +40 more
core   +1 more source

The Perils of Clumpfind: The Mass Spectrum of Sub-structures in Molecular Clouds [PDF]

, 2009
We study the mass spectrum of sub-structures in the Perseus Molecular Cloud Complex traced by 13CO (1-0), finding that $dN/dM\propto M^{-2.4}$ for the standard Clumpfind parameters.
Alyssa A. Goodman, Blitz, Cambrésy, Clauset, Enoch, Erik W. Rosolowsky, Ikeda, Jaime E. Pineda, Johnstone, Kirk, Kramer, Li, Motte, Muench, Muñoz, Ossenkopf, Pineda, Rathborne, Reid, Reid, Reid, Ridge, Rosolowsky, Walsh   +23 more
core   +2 more sources

Emission spectrum of the driven nonlinear oscillator [PDF]

, 2012
Motivated by recent "circuit QED" experiments we investigate the noise properties of coherently driven nonlinear resonators. By using Josephson junctions in superconducting circuits, strong nonlinearities can be engineered, which lead to the appearance ...
St'ephane Andr'e, Lingzhen Guo, V. Peano, M. Marthaler, G. Schon   +4 more
semanticscholar   +1 more source

Excess GeV radiation and cosmic ray origin [PDF]

, 2001
Recent EGRET observations of the diffuse Galactic gamma-ray emission reveal a spectrum which is incompatible with the assumption that the cosmic ray spectra measured locally hold throughout the Galaxy: the spectrum above 1 GeV, where the emission is ...
Aharonian, Aharonian, Allen, Asakimori, Atoyan, Baring, Blandford, Borkowski, Brecher, Buckley, Clark, Dermer, Engel, Erlykin, Erlykin, Erlykin, Erlykin, Esposito, Ferrari, Ferrari, Hartman, Hunter, I. Büsching, Kamei, Koyama, Koyama, LeBohec, M. Pohl, Mannheim, Milne, Moffett, Mori, Muraishi, Möhring, Möhring, Pohl, R. Schlickeiser, Ranft, Reynolds, Roesler, Slane, Sreekumar, Stecker, Thanh Vân, Thanh Vân, Webber   +45 more
core   +2 more sources

Quasiclassical approach to synergic synchrotron–Cherenkov radiation in polarized vacuum

New Journal of Physics, 2020
Photon emission by an ultrarelativistic charged particle in extremely strong magnetic field is analyzed, with vacuum polarization and photon recoil taken into account. Vacuum polarization is treated phenomenologically via refractive index.
I I Artemenko, E N Nerush, I Yu Kostyukov   +2 more
doaj   +1 more source

Electromagnetic Vacuum of Complex Media: Dipole Emission vs. Light Propagation, Vacuum Energy, and Local Field Factors

, 2011
We offer a unified approach to several phenomena related to the electromagnetic vacuum of a complex medium made of point electric dipoles. To this aim, we apply the linear response theory to the computation of the polarization field propagator and study ...
A. A. Abrikosov, E. N. Economou, J. D. Jackson, L. D. Landau, M. Donaire, M. E. Peskin, U. Frisch, U. Frisch   +7 more
core   +1 more source

MAGNETIC NANOPARTICLES IN THE INTERSTELLAR MEDIUM: EMISSION SPECTRUM AND POLARIZATION [PDF]

, 2012
The presence of ferromagnetic or ferrimagnetic nanoparticles in the interstellar medium would give rise to magnetic dipole radiation at microwave and submillimeter frequencies.
B. Draine, B. Hensley
semanticscholar   +1 more source

Frequency Dependence of Air Breakdown and Investigation of Its Electro-Optical Characteristics

Energies
With the expanding frequency range of power equipment, understanding the frequency-dependent insulation performance of air becomes crucial. To address this, this paper establishes an integrated electrical–optical measurement platform for air breakdown to
Ya Wang, Bin Liu, Wenbin Zhao, Xinzhe Yu, Jiangang Bi, Chao Ding   +5 more
doaj   +1 more source

Revision of the γ-Ray Emission from SNR CTB 109 with the Fermi Large Area Telescope

The Astrophysical Journal, 2023
CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. We reanalyze the GeV γ -ray emission from CTB 109 using 13 yr of Pass 8 data recorded by the Fermi Large Area Telescope.
Yuliang Xin, Qizhen Zhao, Xiaolei Guo
doaj   +1 more source