Zobrazeno 1 - 10
of 176
pro vyhledávání: '"Welsch, B."'
Publikováno v:
Philisophical Transactions of the Royal Society A, 2021, 379, 2190
Using data from the Helioseismic Magnetic Imager, we report on the amplitudes and phase relations of oscillations in quiet-Sun, plage, umbra and the polarity inversion line (PIL) of an active region NOAA$\#$11158. We employ Fourier, wavelet and cross
Externí odkaz:
http://arxiv.org/abs/2101.01349
Publikováno v:
Solar Physics, 294, 84 (2019)
In this work we study how the input data cadence affects the photospheric energy and helicity injection estimates in eruptive NOAA active region 11158. We sample the novel 2.25-minute vector magnetogram and Dopplergram data from the \emph{Helioseismi
Externí odkaz:
http://arxiv.org/abs/1907.00367
Autor:
González-García, H., Francke, H., Göllner-Völker, L., Welsch, B., Kranz, S., Huenges, E., Schebeck, L., Sass, I.
Publikováno v:
In Geothermics September 2022 104
Publikováno v:
In Journal of Volcanology and Geothermal Research 1 November 2020 405
We estimate the energy input into the solar corona from photospheric footpoint motions, using observations of a plage region by the Hinode Solar Optical Telescope. Assuming a perfectly ideal coronal evolution, two alternative lower bounds for the Poy
Externí odkaz:
http://arxiv.org/abs/1403.4396
Autor:
Welsch, B. T.
Some models of coronal heating suppose that convective motions at the photosphere shuffle the footpoints of coronal magnetic fields and thereby inject sufficient magnetic energy upward to account for observed coronal and chromospheric energy losses i
Externí odkaz:
http://arxiv.org/abs/1402.4794
Publikováno v:
J. Suzuki et al. 2012 ApJ 758 22
Coronal mass ejections (CMEs) are powered by magnetic energy stored in electric currents in coronal magnetic fields, with the pre-CME field in balance between outward magnetic pressure of the proto-ejecta and inward magnetic tension from confining ov
Externí odkaz:
http://arxiv.org/abs/1211.4684
Autor:
Emslie, A. G., Dennis, B. R., Shih, A. Y., Chamberlin, P. C., Mewaldt, R. A., Moore, C. S., Share, G. H., Vourlidas, A., Welsch, B. T.
We have evaluated the energetics of 38 solar eruptive events observed by a variety of spacecraft instruments between February 2002 and December 2006, as accurately as the observations allow. The measured energetic components include: (1) the radiated
Externí odkaz:
http://arxiv.org/abs/1209.2654
Aims. We show how the build-up of magnetic gradients in the Sun's corona may be inferred directly from photospheric velocity data. This enables computation of magnetic connectivity measures such as the squashing factor without recourse to magnetic fi
Externí odkaz:
http://arxiv.org/abs/1110.3957
Sequences of line-of-sight (LOS) magnetograms recorded by the Michelson-Doppler Imager are used to quantitatively characterize photospheric magnetic structure and evolution in three active regions that rotated across the Sun's disk during the Whole H
Externí odkaz:
http://arxiv.org/abs/1103.2396