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We derive two principal components (PCs) of temporal magnetic field variations over the solar cycles 21–24 from full disk magnetograms covering about 39% of data variance, with σ = 0.67. These PCs are attributed to two main magnetic waves
We derive two principal components (PCs) of temporal magnetic field variations over the solar cycles 21–24 from full disk magnetograms covering about 39% of data variance, with σ = 0.67. These PCs are attributed to two main magnetic waves
Externí odkaz:
http://hdl.handle.net/10454/11803
The three seismic sources, S1, S2, and S3, detected from MDI Dopplergrams using the time-distance (TD) diagram technique are presented with the locations, areas, and vertical and horizontal velocities of the visible wave displacements. Within the dat
Externí odkaz:
http://hdl.handle.net/10454/3939
Autor:
Ipson, Stanley S., Zharkova, Valentina V., Zharkov, Sergei I., Benkhalil, Ali K., Aboudarham, J., Fuller, N.
We present an automated technique for comparison of magnetic field inversion-line maps from SOHO/MDI magnetograms with solar filament data from the Solar Feature Catalogue created as part of the European Grid of Solar Observations project. The Euclid
Externí odkaz:
http://hdl.handle.net/10454/3863
Autor:
Zharkova, Valentina V., Aboudarham, J., Zharkov, Sergei I., Ipson, Stanley S., Benkhalil, Ali K., Fuller, N.
The Solar Feature Catalogues (SFCs) are created from digitized solar images using automated pattern recognition techniques developed in the European Grid of Solar Observation (EGSO) project. The techniques were applied for detection of sunspots, acti
Externí odkaz:
http://hdl.handle.net/10454/4032
Autor:
Ipson, Stanley S., Benkhalil, Ali K., Zharkov, Sergei I., Zharkova, Valentina V., Aboudarham, J., Bentley, R.D.
Robust techniques are developed to put the H and Ca K line full-disk images taken at the Meudon Observatory into a standardised form of a `virtual solar image'. The techniques include limb fitting, removal of geometrical distortion, centre position a
Externí odkaz:
http://hdl.handle.net/10454/3053
Autor:
Quinn, Sean, Reid, Aaron, Mathioudakis, Mihalis, Nelson, Christopher, Prasad, S. Krishna, Zharkov, Sergei
Active region NOAA 12673 was extremely volatile in 2017 September, producing many solar flares, including the largest of solar cycle 24, an X9.3 flare of 06 September 2017. It has been reported that this flare produced a number of sunquakes along the
Externí odkaz:
http://arxiv.org/abs/1906.08545
Autor:
Green, Lucie M., Valori, Gherardo, Zuccarello, Francesco P., Zharkov, Sergei, Matthews, Sarah, Guglielmino, Salvo L.
Sunquakes are created by the hydrodynamic response of the lower atmosphere to a sudden deposition of energy and momentum. In this study we investigate a sunquake that occurred in NOAA active region 11675 on 17 February 2013. Observations of the coron
Externí odkaz:
http://arxiv.org/abs/1709.04874
The presence of flare related acoustic emission (sunquakes) in some flares represents a severe challenge to our current understanding of flare energy transport processes. We present a comparison of new spectral observations from Hinode's EUV imaging
Externí odkaz:
http://arxiv.org/abs/1508.07216
Autor:
Zharkov, Sergei.
Publikováno v:
Connect to e-thesis.
Thesis (Ph.D.) -- University of Glasgow, 2000.
Includes bibliographical references (p.86-88). Print version also available. Mode of access : World Wide Web. System requirements : Adobe Acrobat reader required to view PDF document.
Includes bibliographical references (p.86-88). Print version also available. Mode of access : World Wide Web. System requirements : Adobe Acrobat reader required to view PDF document.
Externí odkaz:
http://theses.gla.ac.uk/1005/