Results 91 to 100 of about 1,645,326 (221)

Fast Transitions of X-Ray Variability in the Neutron Star Low-mass X-Ray Binary Cygnus X-2

The Astrophysical Journal
We present a spectral-timing analysis of two NICER observations of the weakly magnetized neutron star low-mass X-ray binary Cygnus X-2. During these observations, we detect a rapid transition from a narrow 50 Hz horizontal-branch oscillation (HBO) to a ...
Liang Zhang, Mariano Méndez, Hua Feng, Diego Altamirano, Zi-xu Yang, Qing-chang Zhao, Shuang-Nan Zhang, Lian Tao, Yue Huang, Xiang Ma, Shu-mei Jia, Ming-yu Ge, Li-Ming Song, Jin-Lu Qu, Shu Zhang   +14 more
doaj   +1 more source

Sources of high-energy astrophysical neutrinos

Proceedings of High Energy Phenomena in Relativistic Outflows VIII — PoS(HEPROVIII)
We discuss recent results in neutrino astronomy and their implications for the cosmic-ray acceleration in relativistic outflows, such as in Active Galactic Nuclei (AGN) jets, Gamma-Ray Bursts (GRBs), and Tidal Disruption Events (TDEs). We especially focus on challenges at the interface to particle acceleration which can be inferred from the multi ...
openaire   +4 more sources

The Gamma Ray Imaging Detector of the AGILE satellite: A novel application of silicon trackers for detection of astrophysics high-energy photons [PDF]

, 2009
A. Rappoldi
openalex   +1 more source

High-energy neutrino astrophysics: Status and perspectives [PDF]

, 2011
U. Katz, Ch. Spiering
openalex   +1 more source

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

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

High-Energy Astrophysics

, 1991
L. Gratton
openalex   +1 more source

Relevance of axionlike particles for very-high-energy astrophysics [PDF]

, 2011
A. De Angelis, Giorgio Galanti, M. Roncadelli   +2 more
openalex   +1 more source

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  

Very high energy gamma ray astrophysics. Technical progress report, May 1, 1992--April 30, 1993

, 1993
Robert W. Lamb, D. Lewis
openalex   +2 more sources