Polarization characteristics of radio thermal emission of a rough surface with large-structure sharp irregularities. 1. Deterministic irregularities

1985 ◽  
Vol 28 (9) ◽  
pp. 804-810
Author(s):  
Yu. K. Shestopalov
Keyword(s):  
Rough Surface ◽  
Thermal Emission ◽  
Large Structure ◽  
Polarization Characteristics ◽  
Radio Thermal Emission

Solar Radio-Frequency Emission from Localized Regions at Very High Temperatures

1951 ◽  
Vol 4 (2) ◽  
pp. 131
Author(s):  
JH Piddington ◽  
HC Minnett
Keyword(s):  
Radio Frequency ◽  
Solar Radio ◽  
Thermal Emission ◽  
Thermionic Emission ◽  
Magnetic Data ◽  
Radio Frequency Radiation ◽  
Sunspot Data ◽  
Polarization Characteristics ◽  
Frequency Radiation ◽  
Three Components

Solar radio-frequency radiation is analysed into three components ; a basic steady component B, a slowly varying component S, and various forms of more or less rapid fluctuations called the X component. The spectra of all three components are drawn between 600 and 24,000 Mc/s., and suggested extensions to lower frequencies are discussed. The properties of the S component are described in some detail ; these include correlation with sunspot data, polarization, and the location of the sources of origin. Evidence is presented in favour of generation by thermal processes. It is suggested that the S component is due to thermal emission from localized regions at temperatures of about 107 �K., often in the vicinity of sunspots. The radiation from a model hot region is examined in detail and the emission spectrum and polarization characteristics are derived. The results are found to compare reasonably with observation. Thermionic emission of electrons and protons would probably occur from the hot regions. These particles would travel to the Earth with average velocities of a few hundred kilometres per second and may be identical with the slow corpuscular radiation whose presence is deduced from terrestrial magnetic data.

Radio thermal emission from Pluto and Charon during the New Horizons encounter

Icarus ◽  
2019 ◽  
Vol 322 ◽  
pp. 192-209 ◽  
Author(s):  
M.K. Bird ◽  
I.R. Linscott ◽  
G.L. Tyler ◽  
D.P. Hinson ◽  
M. Pätzold ◽  
...  
Keyword(s):  
Thermal Emission ◽  
New Horizons ◽  
Radio Thermal Emission

scholarly journals Nearly Simultaneous Optical and VLBI Polarization Observations of BL Lac Objects

1996 ◽  
Vol 175 ◽  
pp. 242-243
Author(s):  
D.C. Gabuzda ◽  
P.Y. Kochanev ◽  
M.L. Sitko ◽  
P.S. Smith
Keyword(s):  
Magnetic Field ◽  
Thermal Emission ◽  
Model Parameters ◽  
Bl Lac Objects ◽  
Synchrotron Source ◽  
Bl Lacertae ◽  
Simultaneous Measurements ◽  
Source Models ◽  
Polarization Characteristics ◽  
The Magnetic Field

The continua of BL Lacertae objects and other “blazars” are dominated by nonthermal emission that is variable and highly polarized at UV–radio wavelengths (Angel and Stockman 1980; Kollgaard 1994; Allen et al. 1993). It is believed that this non-thermal emission is associated with the relativistic jets that are known to exist in these sources, but details of the jet structure and physics are still very uncertain. It is usually expected that the polarization behavior at optical and radio wavelengths should show little or no correlation, even if genuinely simultaneous measurements are compared. It is typically thought that the emission in these two wavebands originates in vastly different parts of the source, where the magnetic field geometries are likely to be quite different. In some inhomogeneous synchrotron source models for blazars, however, depending on the model parameters considered, the radio and UV-optical-IR (UVOIR) emission may be co-spatial (Ghisellini, Maraschi & Treves (1985)). It is thus of interest to search for correlations between the emission of blazars in the UVOIR and radio, to test such models. Our approach to doing this has been to compare simultaneous measurements of the optical and VLBI polarization characteristics of compact AGN. The polarization of the radiation is effectively used as a probe of the magnetic field structures in the regions where the emission at the two wavelengths arises.

Polarization characteristics of diffraction scattering from metal rough surface

2017 ◽  
Vol 421 ◽  
pp. 565-570 ◽  
Author(s):  
Lianhua Jin ◽  
Takuma Taguchi ◽  
Eiichi Kondoh ◽  
Bernard Gelloz
Keyword(s):  
Rough Surface ◽  
Diffraction Scattering ◽  
Polarization Characteristics
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