Results 71 to 80 of about 1,645,326 (221)
HIGH-ENERGY ASPECTS OF ASTROPHYSICAL JETS [PDF]
International Journal of Modern Physics A, 2006 Various aspects of the high-energy emission from relativistic jets associated with compact astrophysical systems are reviewed. The main leptonic and hadronic processes responsible for the production of high-energy γ-rays, very-high-energy neutrinos and ultra-high energy cosmic rays are discussed.
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GalaxiesThe development of multimessenger astrophysics allows us to probe various background particles from the distant early universe. Up to now, much effort has been made researching the emission and radiation of diverse steady or transient astrophysical ...
Fangsheng Min, Hong Lu, Yiqing Guo
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Chaos in charged AdS black hole extended phase space
Physics Letters B, 2018 We present an analytical study of chaos in a charged black hole in the extended phase space in the context of the Poincare–Melnikov theory. Along with some background on dynamical systems, we compute the relevant Melnikov function and find its zeros ...
M. Chabab +4 more
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Astrophysical sources of high energy neutrinos [PDF]
Nuclear Physics B - Proceedings Supplements, 2003 Several high energy, >100 GeV, neutrino telescopes are currently operating or under construction. Their main motivation is the extension of the horizon of neutrino astronomy to cosmological scales. We show that general, model independent, arguments imply that ~1 Gton detectors are required to detect cosmic high energy neutrino sources.
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Radiative Processes in High Energy Astrophysics [PDF]
, 2013 Contents: Some Fundamental definitions; Bremsstrahlung and black body; Beaming; Synchrotron emission and absorption; Compton scattering; Synchrotron Self-Compton; Pairs; Active Galactic Nuclei.
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Progress of GECAM Observation Research
Kongjian kexue xuebaoGravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a constellation with four instruments (launch date): GECAM-A/B (10 December 2020), GECAM-C (27 July 2022) and GECAM-D (13 March 2024), which are dedicated to monitoring
WANG Chenwei +10 more
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Astrophysics with High Energy Gamma Rays [PDF]
, 2006 Recent results, the present status and the perspectives of high energy gamma-ray astronomy are described. Since the satellite observations by the Compton Gamma Ray Observatory and its precursor missions have been reviewed extensively, emphasis is on the results from the ground-based gamma-ray telescopes.
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Astrophysical high-energy neutrinos [PDF]
Physics Today, 2018 News from multiple messengers—neutrinos, cosmic rays, and photons—provides clues to the cosmic sources that create some of the most energetic particles observed on Earth.
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What do we know about cosmography
European Physical Journal C: Particles and Fields, 2017 In the present paper, we investigate the cosmographic problem using the bias–variance trade-off. We find that both the z-redshift and the $$y=z/(1+z)$$ y = z / ( 1 + z ) -redshift can present a small bias estimation.
Ming-Jian Zhang, Hong Li, Jun-Qing Xia
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Probing signatures of bounce inflation with current observations
European Physical Journal C: Particles and Fields, 2018 The aim of this paper is to probe the features of the bouncing cosmology with the current observational data. Basing on bounce inflation model, with high derivative term, we propose a general parametrization of primordial power spectrum which includes ...
Shulei Ni +4 more
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