Results 41 to 50 of about 1,286 (129)

Statistical analysis of microflares as observed by the 4–8 GHz spectropolarimeter

Solar-Terrestrial Physics, 2023
Radio observations of weak events are one of the promising methods for studying energy release and non-thermal processes in the solar corona. The development of instrumental capabilities allows for radio observations of weak transient coronal events ...
Zhdanov D. A., Altyntsev A. T., Meshalkina N. S., Anfinogentov S. A.   +3 more
doaj   +1 more source

A Genetic Algorithm to Model Solar Radio Active Regions From 3D Magnetic Field Extrapolations

Frontiers in Astronomy and Space Sciences, 2022
In recent decades our understanding of solar active regions (ARs) has improved substantially due to observations made with better angular resolution and wider spectral coverage.
Alexandre José de Oliveira e Silva, Alexandre José de Oliveira e Silva, Alexandre José de Oliveira e Silva, Caius Lucius Selhorst, Joaquim E. R. Costa, Paulo J. A. Simões, Paulo J. A. Simões, Carlos Guillermo Giménez de Castro, Carlos Guillermo Giménez de Castro, Sven Wedemeyer, Stephen M. White, Roman Brajša, Adriana Valio   +12 more
doaj   +1 more source

Behavior of Solar Cycles 23 and 24 Revealed by Microwave Observations [PDF]

, 2012
Using magnetic and microwave butterfly diagrams, we compare the behavior of solar polar regions to show that (i) the polar magnetic field and the microwave brightness temperature during the solar minimum substantially diminished during the cycle 23/24 ...
Altrock, Benevolenskaya, Cranmer, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Hathaway, Kosugi, Lugaz, McIntosh, Nindos, Petrie, Shibasaki, Shimojo   +14 more
core   +1 more source

Observations of a Radio-quiet Solar Preflare

, 2017
The preflare phase of the flare SOL2011-08-09T03:52 is unique in its long duration, its coverage by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) and the Nobeyama Radioheliograph, and the presence of three well-developed soft X-ray ...
Battaglia, M., Benz, A. O., Guedel, M.
core   +1 more source

Solar imaging capabilities of the Brazilian Decimetric Array [PDF]

Geofísica Internacional, 2000
In collaboration with the Department of Physics at the Universidade Federal de São Carlos (UFSC), the Instituto Nacional de Pesquisas Espaciais (INPE), and the Universidade Federal de Santa Maria (UFSM) efforts are made to develop solar tomography using ...
M. L. Mucheroni, C. E. Moron, W. D. Gonzalez, J. H. A. Sobral, G. Swarup, R. R. Rosa, J. R. Cecatto, F. C. R. Fernandes, K. R. Subramanian, H. S. Sawant, E. Lüdke   +10 more
doaj  

Shock-related radio emission during coronal mass ejection lift-off?

, 2008
Aims: We identify the source of fast-drifting decimetric-metric radio emission that is sometimes observed prior to the so-called flare continuum emission.
Artzner, Bougeret, Brueckner, Cairns, Cane, Cane, Farnik, Kai, Klassen, Klassen, Lehtinen, Lin, Melrose, Monstein, Newkirk, Pohjolainen, Robinson, Robinson, S. Pohjolainen, Saito, Vourlidas, Warmuth, Wild   +22 more
core   +1 more source

Quasi-periodic pulsations in solar and stellar flares: re-evaluating their nature in the context of power-law flare Fourier spectra [PDF]

, 2014
The nature of quasi-periodic pulsations in solar and stellar flares remains debated. Recent work has shown that power-law-like Fourier power spectra, also referred to as 'red' noise processes, are an intrinsic property of solar and stellar flare signals,
Dominique, M., Inglis, A. R., Ireland, J.   +2 more
core   +1 more source

The Next Plan of the Nobeyama Radioheliograph [PDF]

International Astronomical Union Colloquium, 1994
A high time- and spatial-resolution radio interferometer for solar observations has been constructed at Nobeyama (Figure I.; Nakajima et al. 1994). The Nobeyama Radioheliograph consists of 84 antennas, 0.8m in diameter, arranged on a T-shape lines of 500m in the EW and 220m in the NS directions.
T. Takano, S. Enome, H. Nakajima, K. Shibasaki, M. Nishio, Y. Hanaoka, C. Torii, H. Sekiguchi, T. Bushimata, S. Kawashima, N. Shinohara, Y. Irimajiri, H. Koshiishi, T. Kosugi, Y. Shiomi, M. Sawa   +15 more
openaire   +1 more source

GPU-Based High-performance Imaging for Mingantu Spectral RadioHeliograph [PDF]

Publications of the Astronomical Society of the Pacific, 2017
As a dedicated solar radio interferometer, the MingantU SpEctral RadioHeliograph (MUSER) generates massive observational data in the frequency range of 400 MHz -- 15 GHz. High-performance imaging forms a significantly important aspect of MUSER's massive data processing requirements.
Mei, Ying, Wang, Feng, Wang, Wei, Chen, Lin-jie, Liu, Ying-bo, Deng, Hui, Dai, Wei, Liu, Cui-yin, Yan, Yi-hua   +8 more
openaire   +2 more sources

China's Ground‐Based Space Environment Monitoring Network—Chinese Meridian Project (CMP)

Space Weather, Volume 22, Issue 7, July 2024.
Abstract Monitoring and investigation of the solar‐terrestrial space environment is a huge challenge for humans in space age. To this end, China has established the Ground‐based Space Environment Monitoring Network, namely Chinese Meridian Project (CMP).
Chi Wang, Jiyao Xu, Zhiqing Chen, Hui Li, Xueshang Feng, Zhaohui Huang, Jiangyan Wang   +6 more
wiley   +1 more source