Temperature and concentration profiles around two aerosol drops with arbitrary radii in the optical radiation field

2021 ◽  
Author(s):  
Anis S. Khasanov
Keyword(s):  
Radiation Field ◽  
Optical Radiation ◽  
Concentration Profiles

scholarly journals Non-thermal emission in the lobes of Fornax A

2019 ◽  
Vol 485 (2) ◽  
pp. 2001-2009 ◽  
Author(s):  
Massimo Persic ◽  
Yoel Rephaeli
Keyword(s):  
Energy Density ◽  
Radiation Field ◽  
Optical Radiation ◽  
Thermal Emission ◽  
Spectral Energy Distribution ◽  
Spectral Energy ◽  
Energetic Electrons ◽  
Neutral Pions ◽  
High Proton ◽  
Γ Ray

Abstract Current measurements of the spectral energy distribution in radio, X-ray and γ-ray provide a sufficiently wide basis for determining basic properties of energetic electrons and protons in the extended lobes of the radio galaxy Fornax  A. Of particular interest is establishing observationally, for the first time, the level of contribution of energetic protons to the extended emission observed by the Fermi satellite. Two recent studies concluded that the observed γ-ray emission is unlikely to result from Compton scattering of energetic electrons off the optical radiation field in the lobes, and therefore that the emission originates from decays of neutral pions produced in interactions of energetic protons with protons in the lobe plasma, implying an uncomfortably high-proton energy density. However, our exact calculation of the emission by energetic electrons in the magnetized lobe plasma leads to the conclusion that all the observed emission can, in fact, be accounted for by energetic electrons scattering off the ambient optical radiation field, whose energy density (which, based on recent observations, is dominated by emission from the central galaxy NGC 1316) we calculate to be higher than previously estimated.

scholarly journals Kohärenz höherer Ordnung in der Optik und ihre Meßbarkeit / Higher-Order Coherence in Optics and Its Measurability

1973 ◽  
Vol 28 (12) ◽  
pp. 1946-1950
Author(s):  
P. Barlai
Keyword(s):  
Radiation Field ◽  
Theoretical Basis ◽  
Optical Radiation ◽  
Coherence Function ◽  
Higher Order ◽  
Far Fields ◽  
Longitudinal Modes

An experiment is proposed to demonstrate higher-order coherence in an optical radiation field. An ensemble of longitudinal modes illuminates a set of different ground glasses (diffusors). It is shown that the superposition of the far-fields emerging from the diffusors is able to give information about higher-order coherence. For the following considerations the theoretical basis is Glauber's generalized coherence function.

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