scholarly journals On a Heuristic Viewpoint Concerning the Quantized Space-time

2020 ◽  
Author(s):  
Yuchen Liu
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Space Time ◽  
Theory Of Relativity ◽  
Unified Framework ◽  
Origin And Evolution ◽  
Modern Physics ◽  
Energy Gamma ◽  
High Energy Emission ◽  
First Time

Einstein's theory of relativity revolutionized the view of space-time in physics, and its basic inferences have been continuously verified in the past 100 years. However, the theory of relativity is built on the basis of continuous and smooth space-time, and it cannot be compatible with the concept of discrete space-time in quantum mechanics, which causes many difficulties in the development of modern physics. This paper presents for the first time a heuristic viewpoint in which space-time is considered to be a type of quantized waves propagating at the speed of light. Based on this concept, it re-explains many inferences of special relativity and general relativity, proposes new theory on gravitation and space-time, and provides a preliminary unified framework for explaining dark matter, dark energy, gamma-ray bursts, high energy emission mechanisms in quasar, the origin and evolution of the universe and other difficult problems in modern physics.

scholarly journals G279.0+1.1: a new extended source of high-energy gamma-rays

2020 ◽  
Vol 492 (4) ◽  
pp. 5980-5986
Author(s):  
M Araya
Keyword(s):  
Spectral Index ◽  
Gamma Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Particle Spectrum ◽  
Large Area ◽  
Extended Source ◽  
The North ◽  
Energy Gamma ◽  
High Energy Emission

ABSTRACT G279.0+1.1 is a supernova remnant (SNR) with poorly known parameters, first detected as a dim radio source and classified as an evolved system. An analysis of data from the Fermi-Large Area Telescope (LAT) revealing for the first time an extended source of gamma-rays in the region is presented. The diameter of the GeV region found is ${\sim} 2{^{\circ}_{.}}8$, larger than the latest estimate of the SNR size from radio data. The gamma-ray emission covers most of the known shell and extends further to the north and east of the bulk of the radio emission. The photon spectrum in the 0.5–500 GeV range can be described by a simple power law, $\frac{\mathrm{ d}N}{\mathrm{ d}E} \propto E^{-\Gamma }$, with a spectral index of Γ = 1.86 ± 0.03stat ± 0.06sys. In the leptonic scenario, a steep particle spectrum is required and a distance lower than the previously estimated value of 3 kpc is favoured. The possibility that the high-energy emission results from electrons that already escaped the SNR is also investigated. A hadronic scenario for the gamma-rays yields a particle spectral index of ∼2.0 and no significant constraints on the distance. The production of gamma-rays in old SNRs is discussed. More observations of this source are encouraged to probe the true extent of the shell and its age.

scholarly journals TeV J2032+4130 - very high energy gamma-ray source of unresolved nature

2019 ◽  
Vol 208 ◽  
pp. 14009
Author(s):  
V.G. Sinitsyna ◽  
V.Y. Sinitsyna ◽  
K.A. Balygin ◽  
S.S. Borisov ◽  
A.M. Kirichenko ◽  
...  
Keyword(s):  
Supernova Remnants ◽  
Gamma Ray ◽  
High Energy ◽  
Electromagnetic Spectrum ◽  
Object Type ◽  
Very High Energy ◽  
Energy Gamma ◽  
Star Formation Regions ◽  
High Energy Emission ◽  
Very High

The Cygnus Region is one of the brightest regions in all ranges of the electromagnetic spectrum and contains a number of potential GeV and TeV emission sources. It includes active star formation regions, pulsars and supernova remnants. Some of the sources have been detected at high and very high energies. One of them discovered due to its proximity to the well-known microquasar Cyg X-3 is the object TeV J2032+4130. This object is still of unresolved nature and is being intensively studied in different energy ranges. The results of twenty-year observations of TeV J2032+4130 by the SHALON experiment are presented in this paper. The collected experimental data on fluxes, spectrum shape and morphology of TeV J2032+413 can help in the future to determine an object type and reveal mechanisms of generation of very high energy emission.

A search for high energy gamma-ray bursts in the EGRET data utilizing space-time correlation

1994 ◽  
Author(s):  
R. Buccheri ◽  
M. C. Maccarone ◽  
J. R. Mattox ◽  
D. J. Thompson ◽  
G. Kanbach ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Time Correlation ◽  
High Energy ◽  
Space Time ◽  
Gamma Ray Bursts ◽  
High Energy Gamma ◽  
Energy Gamma

scholarly journals SOME COMMENTS ON THE HIGH ENERGY EMISSION FROM REGIONS OF STAR FORMATION BEYOND THE GALAXY

2005 ◽  
Vol 20 (37) ◽  
pp. 2827-2843 ◽  
Author(s):  
DIEGO F. TORRES ◽  
EVA DOMINGO-SANTAMARÍA
Keyword(s):  
Star Formation ◽  
Gamma Ray ◽  
General Characteristic ◽  
High Energy ◽  
Point Of View ◽  
Luminous Infrared Galaxies ◽  
High Energy Cosmic Rays ◽  
The Galaxy ◽  
Energy Gamma ◽  
High Energy Emission

Regions that currently are or have been subject to a strong process of star formation are good candidates to be intense γ-ray and neutrino emitters. They may even perhaps be sites where ultra high energy cosmic rays are produced. Outside the Galaxy, the more powerful sites of star formation are found within very active galaxies such as starbursts (SGs) and Luminous or Ultra-Luminous Infrared Galaxies (LIRGs or ULIRGs). Some general characteristic of these objects are herein reviewed from the point of view of their possible status as high energy emitters. Revised estimations of the high energy gamma-ray yield of Arp 220 are presented.

Electronic Structure of Liquid Mercury Using Compton Scattering Technique

2004 ◽  
Vol 59 (9) ◽  
pp. 543-549 ◽  
Author(s):  
B. L. Ahuja ◽  
M. Sharma ◽  
S. Mathur
Keyword(s):  
Compton Scattering ◽  
Gamma Ray ◽  
High Energy ◽  
Background Correction ◽  
Compton Profile ◽  
Electron Configuration ◽  
Bremsstrahlung Radiation ◽  
Energy Gamma ◽  
Compton Electrons ◽  
First Time

The isotropic Compton profile of mercury has been measured, using 661.65 keV gamma-rays from a 20 Ci 137Cs source. To extract the true experimental Compton line shape, besides the usual systematic corrections we have incorporated for the first time the background correction due to bremsstrahlung radiation generated by photo and Compton electrons. Theoretical computations have been carried out, using the renormalised-free-atom (RFA) for the electron configuration 4f145d106s2 and free electron models. It is found that the present experimental data with bremsstrahlung background correction are in better agreement with the RFA calculations. This work suggests the incorporation of the bremsstrahlung background correction in Compton scattering experiments of heavy materials using high-energy gamma-ray sources.

scholarly journals LS I +61 303: MICROQUASAR OR NOT MICROQUASAR?

2008 ◽  
Vol 17 (10) ◽  
pp. 1875-1881
Author(s):  
G. E. ROMERO ◽  
M. ORELLANA ◽  
A. T. OKAZAKI ◽  
S. P. OWOCKI
Keyword(s):  
Neutron Star ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Compact Object ◽  
High Energy ◽  
Very High Energy ◽  
Be Star ◽  
Energy Gamma ◽  
High Energy Emission ◽  
Very High

LS I +61 303 is a puzzling object detected from radio up to very high-energy gamma-rays. Variability has recently been observed in its high-energy emission. The object is a binary system, with a compact object and a Be star as primary. The nature of the secondary and the origin of the gamma-ray emission are not clearly established at present. Recent VLBA radio data have been used to claim that the system is a Be /neutron star colliding wind binary, instead of a microquasar. We review the main views on the nature of LS I +61 303 and present results of 3D SPH simulations that can shed some light on the nature of the system. Our results support an accretion powered source, compatible with a microquasar interpretation.

FEATURES OF MAGNETIC STRUCTURE OF SUNSPOTS GROUPS AT DEVELOPMENT OF SUSTAINED FLUXES HIGH ENERGY GAMMA RAY

2020 ◽  
Vol 3 (331) ◽  
pp. 66-72
Author(s):  
Gennady Sergeevich, Minasyants ◽  
◽  
Tamara Mihailovna, Minasyants ◽  
Vladimir Mihailovich, Tomozov ◽  
◽  
...  
Keyword(s):  
Magnetic Structure ◽  
Gamma Ray ◽  
High Energy ◽  
High Energy Gamma ◽  
Energy Gamma

scholarly journals Introducing the HD+B model for pulsar wind nebulae: a hybrid hydrodynamics/radiative approach

2020 ◽  
Vol 494 (3) ◽  
pp. 4357-4370
Author(s):  
B Olmi ◽  
D F Torres
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Theoretical Modelling ◽  
X Rays ◽  
Pulsar Wind Nebulae ◽  
New Approach ◽  
Energy Gamma ◽  
Radiative Model ◽  
Pulsar Wind

ABSTRACT Identification and characterization of a rapidly increasing number of pulsar wind nebulae is, and will continue to be, a challenge of high-energy gamma-ray astrophysics. Given that such systems constitute -by far- the most numerous expected population in the TeV regime, such characterization is important not only to learn about the sources per se from an individual and population perspective, but also to be able to connect them with observations at other frequencies, especially in radio and X-rays. Also, we need to remove the emission from nebulae in highly confused regions of the sky for revealing other underlying emitters. In this paper, we present a new approach for theoretical modelling of pulsar wind nebulae: a hybrid hydrodynamic-radiative model able to reproduce morphological features and spectra of the sources, with relatively limited numerical cost.

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