Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Watson Fraser"'
Autor:
Moon Kevin R., Li Jimmy J., Delouille Véronique, De Visscher Ruben, Watson Fraser, Hero Alfred O.
Publikováno v:
Journal of Space Weather and Space Climate, Vol 6, p A2 (2016)
Context. The flare productivity of an active region is observed to be related to its spatial complexity. Mount Wilson or McIntosh sunspot classifications measure such complexity but in a categorical way, and may therefore not use all the information
Externí odkaz:
https://doaj.org/article/46d3d0f563ec4a1e926e409d894f3581
Autor:
Maria, Sonja, Colbeck, Marc, Wilkinson-Stokes, Matt, Moon, Adam, Thomson, Michelle, Ballard, Joel, Parker, Lachlan, Watson, Fraser, Oswald, James
Publikováno v:
In Australasian Emergency Care December 2024 27(4):259-267
Autor:
Livingston, William, Watson, Fraser
Publikováno v:
Geophys. Res. Lett. 2015, 42, 9185-9188
Over the past five years, 2010-2015, we have observed, in the near infrared (IR), the maximum magnetic field strengths for 4145 sunspot umbrae. Herein we distinguish field strengths from field flux. (Most solar magnetographs measure flux). Maximum fi
Externí odkaz:
http://arxiv.org/abs/1604.03050
Autor:
Watson, Fraser T., Beck, Christian, Penn, Matthew J., Tritschler, Alexandra, Pillet, Valentin Martinez, Livingston, William C.
In this article we describe a recent effort to cross-calibrate data from an infrared detector at the McMath-Pierce Solar Telescope and the Facility InfraRed Spectropolarimeter (FIRS) at the Dunn Solar Telescope. A synoptic observation program at the
Externí odkaz:
http://arxiv.org/abs/1511.07315
Publikováno v:
The Astrophysical Journal, Volume 787, Issue 1, article id. 22, 9 pp. (2014)
The recent solar minimum and rise phase of solar cycle 24 have been unlike any period since the early 1900s. This article examines some of the properties of sunspot umbrae over the last 17 years with three different instruments on the ground and in s
Externí odkaz:
http://arxiv.org/abs/1511.07300
Autor:
Moon, Kevin R., Delouille, Veronique, Li, Jimmy J., De Visscher, Ruben, Watson, Fraser, Hero III, Alfred O.
Publikováno v:
Journal of Space Weather and Space Climate, Vol. 6, A3 (2016)
Separating active regions that are quiet from potentially eruptive ones is a key issue in Space Weather applications. Traditional classification schemes such as Mount Wilson and McIntosh have been effective in relating an active region large scale ma
Externí odkaz:
http://arxiv.org/abs/1504.02762
Image patch analysis of sunspots and active regions. I. Intrinsic dimension and correlation analysis
Autor:
Moon, Kevin R., Li, Jimmy J., Delouille, Veronique, De Visscher, Ruben, Watson, Fraser, Hero III, Alfred O.
Publikováno v:
Journal of Space Weather and Space Climate, Vol. 6, A2 (2016)
The flare-productivity of an active region is observed to be related to its spatial complexity. Mount Wilson or McIntosh sunspot classifications measure such complexity but in a categorical way, and may therefore not use all the information present i
Externí odkaz:
http://arxiv.org/abs/1503.04127
Akademický článek
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Autor:
Muñoz-Jaramillo, Andrés, Senkpeil, Ryan R., Windmueller, John C., Amouzou, Ernest C., Longcope, Dana W., Tlatov, Andrey G., Nagovitsyn, Yury A., Pevtsov, Alexei A., Chapman, Gary A., Cookson, Angela M., Yeates, Anthony R., Watson, Fraser T., Balmaceda, Laura A., DeLuca, Edward E., Martens, Petrus C. H.
Publikováno v:
The Astrophysical Journal, Volume 800, Issue 1, Page 48, (2015)
In this work we take advantage of eleven different sunspot group, sunspot, and active region databases to characterize the area and flux distributions of photospheric magnetic structures. We find that, when taken separately, different databases are b
Externí odkaz:
http://arxiv.org/abs/1410.6281
Publikováno v:
K.R. Moon, J.J. Li, V. Delouille, F. Watson, and A.O. Hero III, "Image patch analysis and clustering of sunspots: a dimensionality reduction approach," In Image Processing (ICIP), 2014 IEEE Conference on, pp. 1623-1627, 2014
Sunspots, as seen in white light or continuum images, are associated with regions of high magnetic activity on the Sun, visible on magnetogram images. Their complexity is correlated with explosive solar activity and so classifying these active region
Externí odkaz:
http://arxiv.org/abs/1406.6390