Zobrazeno 1 - 10
of 15
pro vyhledávání: '"K. Sundara Raman"'
Autor:
Marco Pellegrini, Jingyan Mo, Wei Liu, Daniel Sepunaru, Adefarati Oloruntoba, Isaiah Adukwu Nathaniel, Sébastien Jacques, Jean-Charles Le Bunetel, Ismail Aouichak, Yves Raingeaud, K. Sundara Raman, Rainer Burghardt, Nikolaos Pappas, Anton V. Pinchuk, Vladimir A. Pinchuk, G. Hegyi, Gy. Vincze, A. Szasz, Oliver Szasz, Yu-Cheng Lin, Yi-Chi Chen, Liang-Yu Chen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07c875808253111b836611c31436c70a
https://doi.org/10.9734/bpi/nips/v1
https://doi.org/10.9734/bpi/nips/v1
Autor:
K. Sundara Raman
Publikováno v:
International Journal of Astronomy and Astrophysics. :10-14
Sun, a star of spectral type G2 is the main source of energy to the Earth. Being close to the Earth, Sun pro-duces a resolvable disk of great detail, which is not possible for other stars. Solar flares and coronal mass ejections are the enigmatic phe
Autor:
K. B. Ramesh, K. Sundara Raman
Publikováno v:
Solar Physics. 234:393-408
Solar spectral irradiance at X-ray wavelengths show large variations over a period of solar cycle. We use X-ray irradiance data in three narrow spectral regimes deduced from Yohkoh SXT measurements to study coronal irradiance and their possible assoc
Publikováno v:
Solar Physics. 180:331-341
The evolution of five bipolar sunspot groups during their disk passage leading to flares are analysed and studied using Kodaikanal Observatory photoheliogram and spectroheliogram data. The changes in the orientation angle observed in the spot groups
Publikováno v:
Solar Physics. 149:119-127
Kodaikanal Hα monochromatic and white-light observations are used to study the circular flare of 14 March, 1984. We report here the dynamic activity of the Hα filament, which attained a severe twist before erupting as a 4B flare. We feel that the r
Publikováno v:
Solar Physics. 146:259-276
We have studied the evolution of two dark Hα filaments as prominences during their disk passage from 12 to 19 February, 1992 and 6 to 17 March, 1992, using Kodaikanal Observatory Hα and Caii K spectroheliograms. Both the filaments were well outside
Publikováno v:
Solar Physics. 146:137-145
We have analyzed the variations in shear angle over a time interval of 30 s during a flare on June 11, 1991, using Kodaikanal Observatory spectroheliogram and photoheliogram data, and assuming Hα filaments are a proxy for the neutral lines. The chan
Publikováno v:
Journal of Astrophysics and Astronomy. 14:45-52
We have taken the case of a circular Hα filament observed on May 9,1979 erupting into a double-ribbon flare associated with a non-spot region. The plage motions are responsible for the filament reorientation and, here as a special case, wherein the
Publikováno v:
Solar Physics. 142:131-141
We have studied the evolution of the double-ribbon, spotless flare of 21 February, 1992, using Kodaikanal Hα and Kf1 observations. The analysis of the data shows that the Hα filament underwent a large change in shear prior to the day of the onset o
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