Results 91 to 100 of about 2,741,953 (182)

A dark matter model that reconciles tensions between the cosmic-ray e± excess and the gamma-ray and CMB constraints

Physics Letters B, 2017
The cosmic-ray (CR) e± excess observed by AMS-02 can be explained by dark matter (DM) annihilation. However, the DM explanation requires a large annihilation cross section which is strongly disfavored by other observations, such as the Fermi-LAT gamma ...
Qian-Fei Xiang, Xiao-Jun Bi, Su-Jie Lin, Peng-Fei Yin   +3 more
doaj  

A Timing View of the Additional High-energy Spectral Component Discovered in the Black Hole Candidate Swift J1727.8-1613

The Astrophysical Journal Letters
We present an energy-dependent analysis for the type-C quasiperiodic oscillations (QPOs) observed in the black hole X-ray binary Swift J1727.8–1613 using Insight-HXMT observations.
Zi-Xu Yang, Liang Zhang, Shuang-Nan Zhang, Lian Tao, Shu Zhang, Ruican Ma, Qing-Cui Bu, Yue Huang, He-Xin Liu, Wei Yu, Guangcheng Xiao, Peng-Ju Wang, Hua Feng, Li-Ming Song, Xiang Ma, Mingyu Ge, Qing-Chang Zhao, Jin-Lu Qu   +17 more
doaj   +1 more source

New Physics with PeV Astrophysical Neutrino Beams [PDF]

arXiv
Astrophysical neutrinos allow us to access energies and baselines that cannot be reached by human-made accelerators, offering unique probes of new physics phenomena. This thesis aims to address the challenges currently facing searches for Beyond Standard Model (BSM) physics in the high-energy universe using astrophysical neutrinos, particularly in the ...
arxiv  

High-energy astrophysics and the search for sources of gravitational waves. [PDF]

Philos Trans A Math Phys Eng Sci, 2018
O'Brien PT, Evans P.
europepmc   +1 more source

Formulation of Galilean relativistic Born–Infeld theory

European Physical Journal C: Particles and Fields
In this paper, we formulate, for the first time, in a systematic manner, Galilean relativistic Born–Infeld action in detail. Exploiting maps connecting Lorentz relativistic and Galilean relativistic vectors, we construct the two limits (electric and ...
Rabin Banerjee, Soumya Bhattacharya, Bibhas Ranjan Majhi   +2 more
doaj   +1 more source

Design and expected performance of a novel hybrid detector for very-high-energy gamma-ray astrophysics [PDF]

, 2016
P. Assis, U. D. Almeida, A. Blanco, R. Conceição, B. Piazzoli, A. Angelis, M. Doro, P. Fonte, L. Lopes, G. Matthiae, M. Pimenta, R. Shellard, B. Tom'e   +12 more
semanticscholar   +1 more source

Thermodynamics of a Schwarzschild black hole surrounded by quintessence in the generalized uncertainty principle framework

European Physical Journal C: Particles and Fields
We investigate the thermodynamics of a Schwarzschild black hole, surrounded by the quintessence energy-matter in the linear and quadratic generalized uncertainty principle framework.
Soham Sen, Abhijit Dutta, Sunandan Gangopadhyay   +2 more
doaj   +1 more source

The advanced telescope for high energy astrophysics

Astronomical Notes - Astronomische Nachrichten, 2019
G. Matt
semanticscholar   +1 more source

Sengupta transformations and Carrollian relativistic theory

European Physical Journal C: Particles and Fields
A detailed and systematic formulation of Carrollian relativity is provided. Based on the transformations, first provided by Sengupta (Nuovo Cim, 54:512, 1966), we construct a mapping between Lorentz relativistic and Carrollian relativistic vectors. Using
Rabin Banerjee, Soumya Bhattacharya, Bibhas Ranjan Majhi   +2 more
doaj   +1 more source

Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary System

The Astrophysical Journal Letters
We report the study of a huge optical intraday flare on 2021 November 12 at 2 a.m. UT in the blazar OJ 287. In the binary black hole model, it is associated with an impact of the secondary black hole on the accretion disk of the primary.
Mauri J. Valtonen, Staszek Zola, Alok C. Gupta, Shubham Kishore, Achamveedu Gopakumar, Svetlana G. Jorstad, Paul J. Wiita, Minfeng Gu, Kari Nilsson, Alan P. Marscher, Zhongli Zhang, Rene Hudec, Katsura Matsumoto, Marek Drozdz, Waldemar Ogloza, Andrei V. Berdyugin, Daniel E. Reichart, Markus Mugrauer, Lankeswar Dey, Tapio Pursimo, Harry J. Lehto, Stefano Ciprini, T. Nakaoka, M. Uemura, Ryo Imazawa, Michal Zejmo, Vladimir V. Kouprianov, James W. Davidson Jr., Alberto Sadun, Jan Štrobl, Z. R. Weaver, Martin Jelínek   +31 more
doaj   +1 more source