Results 61 to 70 of about 1,645,326 (221)

Very-high-energy gamma-ray emission from GRB 201216C detected by MAGIC

open access: yes, 2021
Institute for Cosmic Ray Research, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Japan Max Planck Institut for Physics,Föhringer Ring 6, Munich, Germany INFN MAGIC Group: INFN Sezione di Bari and Dipartimento Interateneo di Fisica dell’Università ...
S. Fukami   +194 more
semanticscholar   +1 more source

High Energy Astrophysics and Cosmology [PDF]

open access: yesHighlights of Astronomy, 1980
AbstractA brief review is given of cosmological tests based on quasars, of source evolution and of the X-ray background. The cosmological tests are still inconclusive because of the limited material available and the possibility of serious selection effects.
openaire   +2 more sources

High Energy Astrophysical Techniques [PDF]

open access: yesProceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII — PoS(MULTIF2019), 2017
This textbook presents ultraviolet and X-ray astronomy, gamma-ray astronomy, cosmic ray astronomy, neutrino astronomy, and gravitational wave astronomy as distinct research areas, focusing on the astrophysics targets and the requirements with respect to instrumentation and observation methods.
openaire   +3 more sources

On the Galactic Center being the main source of galactic cosmic rays as evidenced by recent cosmic ray and gamma ray observations

open access: yesNew Journal of Physics, 2013
We revisit the idea that the Galactic Center (GC) is the dominant source of galactic cosmic rays (GCRs), based on a series of new observational evidence. A unified model is proposed to explain the new phenomena of GCRs and γ -rays simultaneously.
Yi-Qing Guo   +4 more
doaj   +1 more source

TA Spectrum [PDF]

open access: yesEPJ Web of Conferences, 2019
The Telescope Array (TA) experiment is measuring cosmic rays of energies from PeV to 100 EeV and higher in the Northern hemisphere. TA has two parts: main TA and the TA low energy extension (TALE).
Ivanov Dmitri
doaj   +1 more source

Delensing for precision cosmology: optimizing future CMB B-mode surveys to constrain r

open access: yesEuropean Physical Journal C: Particles and Fields
The detection of primordial B-modes, a key probe of cosmic inflation, is increasingly challenged by contamination from weak gravitational lensing B-modes induced by large-scale structure (LSS).
Wen-Zheng Chen   +3 more
doaj   +1 more source

A Model for Nonthermal Particle Acceleration in Relativistic Magnetic Reconnection

open access: yesThe Astrophysical Journal Letters, 2023
The past decade has seen an outstanding development of nonthermal particle acceleration in magnetic reconnection in magnetically dominated systems, with clear signatures of power-law energy distributions as a common outcome of first-principles kinetic ...
Xiaocan Li, Fan Guo, Yi-Hsin Liu, Hui Li
doaj   +1 more source

Wide field imager instrument for the Advanced Telescope for High Energy Astrophysics

open access: yes, 2014
. The Advanced Telescope for High Energy Astrophysics (Athena) has been selected for ESA’s L2 mission, scheduled for launch in 2028. It will provide the necessary capabilities to achieve the ambitious goals of the science theme “The Hot and Energetic ...
N. Meidinger   +7 more
semanticscholar   +1 more source

New Timing Results of MSPs from NICER Observations

open access: yesUniverse
Millisecond pulsars (MSPs) are known for their long-term stability. Using six years of observations from the Neutron Star Interior Composition Explorer (NICER), we have conducted an in-depth analysis of the X-ray timing results for six MSPs: PSRs B1937 ...
Shijie Zheng   +12 more
doaj   +1 more source

Born–Infeld corrections to holographic transport coefficients with spatially modulated chemical potential

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
In this work, we have analytically computed the holographic transport coefficients for $$(2+1)$$ ( 2 + 1 ) -dimensional strongly coupled field theories, placed in a spatially modulated chemical potential along the x-direction, in the presence of Born ...
Ankur Srivastav   +2 more
doaj   +1 more source

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