4.1.1.8 Radio emission of the quiet sun

2005 ◽  
pp. 117-119
Author(s):  
O. Hachenberg
Keyword(s):  
Radio Emission ◽  
Quiet Sun

Variation of Quiet Sun Radiation during Solar Cycles 23 and 24

2017 ◽  
Vol 13 (S335) ◽  
pp. 11-13
Author(s):  
Mahender Aroori ◽  
G. Yellaiah ◽  
K. Chenna Reddy
Keyword(s):  
Radio Emission ◽  
Brightness Temperature ◽  
Statistical Method ◽  
Solar Radio ◽  
Solar Radio Emission ◽  
Solar Cycles ◽  
Quiet Sun ◽  
Data Centre ◽  
National Geophysical Data ◽  
Using Data

AbstractRadio observations play a very important role in understanding the structure of the solar atmosphere. In this paper the quiet sun component of the solar radio emission has been investigated using data obtained from the Solar Indices Bulletin, National Geophysical Data Centre. By statistical method, the quiet sun component is estimated for 84 successive basic periods containing three solar rotations each using data obtained at different frequencies. From the quiet sun component we estimate the brightness temperature in each observing frequency.

scholarly journals Observations of the Quiet Sun with 6″ Resolution

1980 ◽  
Vol 86 ◽  
pp. 53-55
Author(s):  
M. R. Kundu ◽  
A. P. Rao ◽  
F. T. Erskine ◽  
J. D. Bregman
Keyword(s):  
High Resolution ◽  
Radio Emission ◽  
Transition Region ◽  
Spatial Resolution ◽  
Radio Telescope ◽  
Solar Radio ◽  
High Spatial Resolution ◽  
Solar Radio Emission ◽  
Quiet Sun ◽  
Millimeter Wavelengths

Solar radio emission at centimeter and millimeter wavelengths originates in the chromosphere and transition region and is a useful probe for the temperature and density in these regions. High spatial resolution observations of the quiet sun provide valuable information on the structure of the solar atmosphere. We have performed high resolution (~ 6″ (E-W) x 15″ (N-S)) observations at 6 cm with the Westerbork Synthesis Radio Telescope (WSRT) in June 1976 in order to search for the radio analog of the supergranulation network and to study the extent and symmetry of limb brightening. The use of the WSRT for high spatial resolution solar mapping has been described by Bregman and Felli (1976), Kundu et al. (1977), and others.

Radio Emission of the Quiet Sun and Active Regions (Invited Review)

2011 ◽  
pp. 3-31 ◽  
Author(s):  
K. Shibasaki ◽  
C. E. Alissandrakis ◽  
S. Pohjolainen
Keyword(s):  
Radio Emission ◽  
Active Regions ◽  
Quiet Sun

Height of the slowly varying component of radio emission at 9.1 cm during the Quiet Sun Years

Solar Physics ◽  
1969 ◽  
Vol 6 (2) ◽  
pp. 251-254 ◽  
Author(s):  
A. C. Riddle
Keyword(s):  
Radio Emission ◽  
Quiet Sun

scholarly journals 3D Simulations of the Quiet Sun Radio Emission at Millimeter and Submillimeter Wavelengths

2008 ◽  
Vol 47 (3) ◽  
Author(s):  
V. De la Luz ◽  
A. Lara ◽  
E. Mendoza ◽  
M. Shimojo
Keyword(s):  
Radio Emission ◽  
3D Simulations ◽  
Quiet Sun ◽  
Submillimeter Wavelengths ◽  
Millimeter And Submillimeter Wavelengths ◽  
Sierra Negra

Presentamos imágenes bidimensionales de simulaciones en 3D de la radioemisión solar en su régimen quieto a diferentes frecuencias, que van desde longitudes de onda centimétricas hasta submilimétricas (1.4, 3.9, 17, 34, 43, 110, 212 y 250 GHz). Construimos un modelo solar esférico 3D y resolvimos la ecuación clásica de transporte radiativo usando temperaturas y densidades electrónicas para el Sol Quieto. Comparamos nuestros resultados con observaciones del Nobeyama Radio Heliograph a 17 GHz. Las imágenes obtenidas a frecuencias de 3.9 GHz y 43 GHz serán de gran ayuda para calibrar las observaciones del nuevo telescopio milimétrico (RT5) que está siendo instalado en el Volcán "Sierra Negra", en el estado de Puebla, México, a una altitud de 4,600 m. Este proyecto es una colaboración entre el Instituto Nacional de Astrofísica Óptica y Electrónica (INAOE) y la Universidad Nacional Autónoma de México (UNAM).

scholarly journals Effect of suprathermal particles on the quiet Sun radio emission

2004 ◽  
Vol 422 (1) ◽  
pp. 331-336 ◽  
Author(s):  
C. Chiuderi ◽  
F. Chiuderi Drago
Keyword(s):  
Radio Emission ◽  
Quiet Sun ◽  
Suprathermal Particles

scholarly journals 50. Observations of brightness over the disk of the quiet sun at frequencies of 85, 500 and 1400 Mc./s.

1957 ◽  
Vol 4 ◽  
pp. 284-289
Author(s):  
J. L. Pawsey
Keyword(s):  
Radio Emission ◽  
Solar Disk ◽  
Thermal Emission ◽  
Large Range ◽  
Model Atmosphere ◽  
Brightness Distribution ◽  
Final Model ◽  
Quiet Sun ◽  
Comprehensive Information ◽  
Electron Density And Temperature

Observations of radio emission from the quiet sun, which is believed to be due to thermal emission from the ionized gases of the solar atmosphere, provide information about the electron density and temperature throughout the atmosphere. Comprehensive information requires observations, preferably of the brightness distribution over the solar disk, over a large range of wave-lengths. Because such observations are both difficult and tedious it is desirable that a final model atmosphere should be based on a pool of observations taken by independent methods and observers. The following are recent contributions to this pool from the Radiophysics Laboratory.

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