Results 91 to 100 of about 18,734,225 (295)

New insights on mutual information in the island approach to the Page curve

European Physical Journal C: Particles and Fields
In this article, we have presented one of the very important observations, regarding the behavior of mutual information of two different sets of subsystems in the after Page time scenario. This provides us with some deep insights about the redistribution
Anirban Roy Chowdhury, Souvik Paul, Sunandan Gangopadhyay   +2 more
doaj   +1 more source

Discovery of energy-dependent phase variations in the polarization angle of Cen X-3

Astronomy & Astrophysics
We present a detailed polarimetric analysis of Cen X-3 using IXPE observations during its high state, revealing a complex, energy-dependent polarization behavior. While phase-averaged polarization shows marginal energy dependence, phase-resolved analysis
Zhao Qing-Chang, Tao Lian, Tsygankov Sergey S., Poutanen Juri, Feng Hua, Zhang Shuang-Nan, Li Hancheng, Ge Mingyu, Zhang Liang, Mushtukov Alexander A.   +9 more
doaj   +1 more source

Very-high-energy gamma astrophysics [PDF]

, 2009
High-energy photons are a powerful probe for astrophysics and for fundamental physics under extreme conditions. During the recent years, our knowledge of the most violent phenomena in the Universe has impressively progressed thanks to the advent of new ...
De Angelis, A.
core   +1 more source

Photochemical effects of Mars‐like UV irradiation on carboxylic acids in carbonaceous chondrites and expectations for abiotic background organics on Mars

Meteoritics &Planetary Science, EarlyView.
Abstract In the search for life on Mars, understanding the origin of preserved organics is critical. Expected sources include exogenous delivery, endogenous synthesis, and potentially life. Environmental processing by ultraviolet (UV) irradiation can alter these organics, obscuring hallmarks of their origin. To deconvolve these effects, we conducted an
D. K. Buckner, J. C. Aponte, A. C. Schuerger, D. I. Foustoukos, F. Seguin, M. B. Wilhelm, G. Cooper, A. J. Williams   +7 more
wiley   +1 more source

Investigating the role of mutual information in the Page curve for a functional renormalization group improved Schwarzschild black hole

European Physical Journal C: Particles and Fields
The present work delves into probing the importance of mutual information of relevant subsystems in obtaining the correct time-evolution of fine-grained entropy of Hawking radiation, as suggested by Page.
Ashis Saha, Anirban Roy Chowdhury, Sunandan Gangopadhyay   +2 more
doaj   +1 more source

Z-pole test of effective dark matter diboson interactions at the CEPC

European Physical Journal C: Particles and Fields, 2018
We investigate the projected sensitivity to effective dark matter (DM)–diboson interaction during the high luminosity Z-pole and 240 GeV runs at the proposed Circular Electron Positron Collider (CEPC).
Mingjie Jin, Yu Gao
doaj   +1 more source

High-Energy Spectroscopic Astrophysics: Swiss Society for Astrophysics and Astronomy

, 2005
After three decades of intense research in X-ray and gamma-ray astronomy, the time was ripe to summarize basic knowledge on X-ray and gamma-ray spectroscopy for interested students and researchers ready to become involved in new high-energy missions ...
Kahn, Steven M, Sunyaev, Rashid A, von Ballmoos, Peter   +2 more
core   +1 more source

Description and terrestrial ages of the Calama Area Meteorite Collection (Atacama Desert, Chile)

Meteoritics &Planetary Science, EarlyView.
Abstract We present a comprehensive study of a meteorite collection from the Atacama Desert (Chile), the driest and most climatically stable desert in the world. This collection includes meteorites from three adjacent Dense Collection Areas (DCAs) in the northern part of the Atacama Desert: Calama, Sierra Gorda, and Chug Chug, referred to as the ...
Carine Sadaka, Jérôme Gattacceca, Florian Dumas, Régis Braucher, ASTER Team, Matthieu Gounelle, Dilyara Kuzina, Cyril Lorenz, Alexandre Corgne, Pierre Sempéré   +9 more
wiley   +1 more source

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

New 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, Zhao-Yang Feng, Qiang Yuan, Cheng Liu, Hong-Bo Hu   +4 more
doaj   +1 more source

High Energy Astrophysics and Cosmology [PDF]

Highlights 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   +1 more source