Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Udo Ziegler"'
Publikováno v:
Research in Astronomy and Astrophysics. 23:035006
An Ellerman Bomb (EB) is a kind of small scale reconnection event, which is ubiquitously formed in the upper photosphere or the lower chromosphere. The low temperature (19–1022) plasma there makes the magnetic reconnection process strongly influenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e3d31a4df38d50b94601c5a0496b6bb
https://doi.org/10.1088/1674-4527/acafc3
https://doi.org/10.1088/1674-4527/acafc3
Autor:
Yuhao Chen, Jing Ye, Zhixing Mei, Chengcai Shen, Ilia I. Roussev, Terry G. Forbes, Jun Lin, Udo Ziegler
Publikováno v:
The Astrophysical Journal. 933:148
We performed 2D magnetohydrodynamical numerical experiments to study the response of the coronal magnetic configuration to the newly emerging magnetic flux. The configuration includes an electric-current-carrying flux rope modeling the prominence flo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::839c1b29fedd262d5d0ab9e7fc4dbe44
https://doi.org/10.3847/1538-4357/ac73ef
https://doi.org/10.3847/1538-4357/ac73ef
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 482:588-605
Magnetic reconnection plays an important role in the energy conversion during solar eruptions. In this work, we present a resistive magnetohydrodynamical study (2.5D) of a flux rope eruption based on the Lin and Forbes model regarding cascading recon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a69d207fd45881796cd16ba7131fbde6
https://doi.org/10.1093/mnras/sty2716
https://doi.org/10.1093/mnras/sty2716
Context: Long-term variability in solar cycles represents a challenging constraint for theoretical models. Mean-field Babcock-Leighton dynamos that consider non-instantaneous rising flux tubes have been shown to exhibit long-term variability in their
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73ee9e99ee85d1b83572a83b51fd8957
Autor:
Udo Ziegler
Publikováno v:
SIAM Journal on Scientific Computing. 34:C102-C121
An adaptive mesh refinement scheme for the equations of magnetohydrodynamics on curvilinear-orthogonal grids is presented. A block-structured refinement approach is used sharing important properties with the hybrid central-upwind/constrained-transpor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::939026a4a17a3af7761aca848f162def
https://doi.org/10.1137/110843940
https://doi.org/10.1137/110843940
Autor:
Udo Ziegler
Publikováno v:
Astronomy & Astrophysics. 620:A81
Context. Gas cooling and other thermal processes in the interstellar medium are intimately related to its chemical evolution. To accurately model chemical processes in large-scale gas-dynamical simulations the usage of existing sophisticated astroche
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::745378413a453ba520235d8989445f81
https://doi.org/10.1051/0004-6361/201834033
https://doi.org/10.1051/0004-6361/201834033
Publikováno v:
Research in Astronomy and Astrophysics. 18:045
The Kelvin-Hemholtz (K-H) instability in the corona EUV jet is studied via 2.5 MHD numerical simulations. The jet results from magnetic reconnection due to the interation of the new emerging magnetic field and the pre-existing magnetic field in the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56d6070639da45da698ea451326183c2
https://doi.org/10.1088/1674-4527/18/4/45
https://doi.org/10.1088/1674-4527/18/4/45
Publikováno v:
EAS Publications Series. 44:73-76
Within the interstellar medium, supernovae are thought to be the prevailing agents in driving turbulence. Until recently, their effects on magnetic field amplification in disk galaxies remained uncertain. Analytical models based on the uncorrelated-e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5e56f02e7f2d36c3ffc09e5a4cd59d8
https://doi.org/10.1051/eas/1044013
https://doi.org/10.1051/eas/1044013
Publikováno v:
Proceedings of the International Astronomical Union. 4:81-86
Supernovae are the dominant energy source for driving turbulence within the interstellar plasma. Until recently, their effects on magnetic field amplification in disk galaxies remained a matter of speculation. By means of self-consistent simulations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d02e49a11c559d76d1b411141350867a
https://doi.org/10.1017/s1743921309030099
https://doi.org/10.1017/s1743921309030099
Autor:
Udo Ziegler
Publikováno v:
Computer Physics Communications. 157:207-216
I describe a Poisson solver for the adaptive mesh magnetohydrodynamics (MHD) code NIRVANA using ADI techniques (ADI: Alternative Direction Implicit). The solver is fit to the mesh refinement framework of the code and utilizes its special block-struct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::677d4986f4c76ee2241de3b143069047
https://doi.org/10.1016/j.comphy.2003.08.001
https://doi.org/10.1016/j.comphy.2003.08.001