Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Grigis, Paolo"'
Autor:
Holman, Gordon D., Aschwanden, Markus J., Aurass, Henry, Battaglia, Marina, Grigis, Paolo C., Kontar, Eduard P., Liu, Wei, Saint-Hilaire, Pascal, Zharkova, Valentina V.
High-energy X-rays and gamma-rays from solar flares were discovered just over fifty years ago. Since that time, the standard for the interpretation of spatially integrated flare X-ray spectra at energies above several tens of keV has been the collisi
Externí odkaz:
http://arxiv.org/abs/1109.6496
Autor:
Fletcher, Lyndsay, Dennis, Brian R., Hudson, Hugh S., Krucker, Sam, Phillips, Ken, Veronig, Astrid, Battaglia, Marina, Bone, Laura, Caspi, Amir, Chen, Qingrong, Gallagher, Peter, Grigis, Paolo C., Ji, Haisheng, Milligan, Ryan O., Temmer, Manuela
Publikováno v:
Space Science Reviews, vol. 159, pp. 19-106; 09 September 2011
We present an overview of solar flares and associated phenomena, drawing upon a wide range of observational data primarily from the RHESSI era. Following an introductory discussion and overview of the status of observational capabilities, the article
Externí odkaz:
http://arxiv.org/abs/1109.5932
Autor:
Ma, Suli, Raymond, John C., Golub, Leon, Lin, Jun, Chen, Huadong, Grigis, Paolo, Testa, Paola, Long, David
Taking advantage of both the high temporal and spatial resolution of the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO), we studied a limb coronal shock wave and its associated extreme ultraviolet (EUV) wave that occ
Externí odkaz:
http://arxiv.org/abs/1106.6056
Autor:
Narukage, Noriyuki, Sakao, Taro, Kano, Ryouhei, Hara, Hirohisa, Shimojo, Masumi, Bando, Takamasa, Urayama, Fumitaka, DeLuca, Edward, Golub, Leon, Weber, Mark, Grigis, Paolo, Cirtain, Jonathan, Tsuneta, Saku
The X-Ray Telescope (XRT) onboard the Hinode satellite is an X-ray imager that observes the solar corona with unprecedentedly high angular resolution (consistent with its 1" pixel size). XRT has nine X-ray analysis filters with different temperature
Externí odkaz:
http://arxiv.org/abs/1011.2867
Autor:
Grigis, Paolo C., Benz, Arnold O.
Publikováno v:
Astrophys.J.683:1180-1191,2008
RHESSI observations are used to quantitatively study the hard X-ray evolution in 5 large solar flares selected for spectral hardening in the course of the event. The X-ray bremsstrahlung emission from non-thermal electrons is characterized by two spe
Externí odkaz:
http://arxiv.org/abs/0708.2472
Autor:
Grigis, Paolo C., Benz, Arnold O.
Publikováno v:
Astron.Astrophys. 458 (2006) 641-651
Context: Stochastic acceleration is thought to be a key mechanism in the energization of solar flare electrons. Aims: We study whether stochastic acceleration can reproduce the observed soft-hard-soft evolution of the spectral features of the hard X-
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606339
Autor:
Grigis, Paolo C., Benz, Arnold O.
Publikováno v:
Proceedings of the 11th European Solar Physics Meeting "The Dynamic Sun: Challenges for Theory and Observations" (ESA SP-600). 11-16 September 2005, Leuven, Belgium. Editors: D. Danesy, S. Poedts, A. De Groof and J. Andries. Published on CDROM., p.35.1
RHESSI observations of elementary flare bursts are presented. These solar flare elements are distinct emission peaks of a duration of some tens of seconds present in the hard X-ray light curves. They are characterized by consistent soft-hard-soft spe
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602302
Autor:
Benz, Arnold O., Grigis, Paolo C., Hungerbuhler, V., Meyer, Hansueli, Monstein, Cristian, Stuber, Bruno, Zardet, D.
The core architecture, tests in the lab and first results of a Fast Fourier Transform (FFT) spectrometer are described. It is based on a commercially available fast digital sampler (AC240) with an on-board Field Programmable Gate Array (FPGA). The sp
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509671
Non-thermal and thermal parameters of 85 solar flares of GOES class B1 to M6 (background subtracted classes A1 to M6) have been compared to each other. The hard X-ray flux has been measured by RHESSI and a spectral fitting provided flux and spectral
Externí odkaz:
http://arxiv.org/abs/astro-ph/0505154
Autor:
Grigis, Paolo C., Benz, Arnold O.
Publikováno v:
Astrophys.J. 625 (2005) L143-L146
RHESSI observations of a solar flare showing continuous motions of double hard X-ray sources interpreted as footpoints of magnetic loops are presented. The temporal evolution shows many distinct emission peaks of duration of some tens of seconds ('el
Externí odkaz:
http://arxiv.org/abs/astro-ph/0504436