Zobrazeno 1 - 10
of 262
pro vyhledávání: '"Galsgaard, K."'
Autor:
Nóbrega-Siverio, D., Moreno-Insertis, F., Galsgaard, K, Krikova, K., van der Voort, L. Rouppe, Joshi, R., Madjarska, M. S.
The solar atmosphere is filled with clusters of hot small-scale loops commonly known as Coronal Bright Points (CBPs). These ubiquitous structures stand out in the Sun by their strong X-ray and/or extreme-ultraviolet (EUV) emission for hours to days,
Externí odkaz:
http://arxiv.org/abs/2311.11912
Publikováno v:
A&A 606, A46 (2017)
{We report on the first of a series of studies on coronal bright points investigating the physical mechanism that generates these phenomena.} {The aim of this paper is to understand the magnetic-field structure that hosts the bright points.} {We use
Externí odkaz:
http://arxiv.org/abs/1707.04174
Coronal magnetic null points exist in abundance as demonstrated by extrapolations of the coronal field, and have been inferred to be important for a broad range of energetic events. These null points and their associated separatrix and spine field li
Externí odkaz:
http://arxiv.org/abs/1605.05704
Context. Observations of many active regions show a slow systematic outflow/upflow from their edges lasting from hours to days. At present no physical explanation has been proven, while several suggestions have been put forward. Aims. This paper inve
Externí odkaz:
http://arxiv.org/abs/1509.05639
Publikováno v:
A&A 584, A38 (2015)
Upflows at the edges of active regions (ARs) are studied by spatially and temporally combining multi-instrument observations obtained with EIS/Hinode, AIA and HMI/SDO and IBIS/NSO, to derive their plasma parameters. This information is used for bench
Externí odkaz:
http://arxiv.org/abs/1509.05624
Publikováno v:
ApJ, 774, 154 (2013)
Three-dimensional magnetic null points are ubiquitous in the solar corona, and in any generic mixed-polarity magnetic field. We consider magnetic reconnection at an isolated coronal null point, whose fan field lines form a dome structure. We demonstr
Externí odkaz:
http://arxiv.org/abs/1307.6874
Numerical MHD simulations of 3D reconnection events in the solar corona have improved enormously over the last few years, not only in resolution, but also in their complexity, enabling more and more realistic modeling. Various ways to obtain the init
Externí odkaz:
http://arxiv.org/abs/1203.1018
Publikováno v:
Astronomy & Astrophysics, vol. 533, article A78, 2011
Three-dimensional null points are present in abundance in the solar corona, and the same is likely to be true in other astrophysical environments. Recent studies suggest that reconnection at such 3D nulls may play an important role in the coronal dyn
Externí odkaz:
http://arxiv.org/abs/1105.2684
Autor:
Galsgaard, K., Pontin, D. I.
To systematically stress a rotationally symmetric 3D magnetic null point by advecting the opposite footpoints of the spine axis in opposite directions. This stress eventually concentrates in the vicinity of the null point forming a local current shee
Externí odkaz:
http://arxiv.org/abs/1102.2351
Aims: Our aim is to investigate the resistive relaxation of a magnetic loop that contains braided magnetic flux but no net current or helicity. The loop is subject to line-tied boundary conditions. We investigate the dynamical processes that occur du
Externí odkaz:
http://arxiv.org/abs/1003.5784