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We investigate intensity variations and energy deposition in five coronal loops in active region cores. These were selected for their strong variability in the AIA/SDO 94 {\AA} intensity channel. We isolate the hot Fe XVIII and Fe XXI components of t
Externí odkaz:
http://arxiv.org/abs/1404.7824
Autor:
Lawrence, J. K., Cadavid, A. C.
We study Hinode/SOT-FG observations of intensity fluctuations in Ca II H-line and G-band image sequences and their relation to simultaneous and co-spatial magnetic field measurements. We explore the G-band and H-line intensity oscillation spectra bot
Externí odkaz:
http://arxiv.org/abs/1206.4360
Publikováno v:
2011 ApJ, 743, L24
The Rapid Oscillations in the Solar Atmosphere (ROSA) instrument reveals solar atmospheric fluctuations at high frequencies. Spectra of variations of the G-band intensity (IG) and CaII K-line intensity (IK) show correlated fluctuations above white no
Externí odkaz:
http://arxiv.org/abs/1111.4253
Autor:
Lawrence, J. K., Cadavid, A. C.
We study the space-time distributions of intensity fluctuations in 2 - 3 hour sequences of multi-spectral, high-resolution, high-cadence broad-band filtergram images (BFI) made by the SOT-FG system aboard the Hinode spacecraft. In the frequency range
Externí odkaz:
http://arxiv.org/abs/0907.5001
Mutual quasi-periodicities near the solar-rotation period appear in time series based on the Earth's magnetic field, the interplanetary magnetic field, and signed solar-magnetic fields. Dominant among these is one at 27.03 +/- 0.02 days that has been
Externí odkaz:
http://arxiv.org/abs/0803.3260
Principal Components Analysis (PCA) and Independent Component Analysis (ICA) are used to identify global patterns in solar and space data. PCA seeks orthogonal modes of the two-point correlation matrix constructed from a data set. It permits the iden
Externí odkaz:
http://arxiv.org/abs/0709.3263
Autor:
Finkelstein, Robert J., Cadavid, A. C.
Publikováno v:
Int.J.Mod.Phys.A21:4269-4302,2006
The q-electroweak theory suggests a description of elementary particles as solitons labelled by the irreducible representations of SU_q(2). Since knots may also be labelled by the irreducible representations of SU_q(2), we study a model of elementary
Externí odkaz:
http://arxiv.org/abs/hep-th/0507022
Below the scale of supergranules we find that cellular flows are present in the solar photosphere at two distinct size scales, approximately 2 Mm and 4 Mm, with distinct characteristic times. Simultaneously present in the flow is a non-cellular compo
Externí odkaz:
http://arxiv.org/abs/astro-ph/0104354
Publikováno v:
Phys. Rev. Letters, 86, 5894 (2001)
The Sun provides an excellent natural laboratory for nonlinear phenomena. We use motions of magnetic bright points on the solar surface, at the smallest scales yet observed, to study the small scale dynamics of the photospheric plasma. The paths of t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0101224