Zobrazeno 1 - 10
of 94
pro vyhledávání: '"E. Tandberg-Hanssen"'
Solar mid-IR observations in the 8-15 micrometer band continuum with moderate angular resolution (18 arcseconds) reveal the presence of bright structures surrounding sunspots. These plage-like features present good association with calcium CaII K1v p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c3ae145868bc3e05b30b66cc17bce08
http://arxiv.org/abs/0708.2261
http://arxiv.org/abs/0708.2261
Publikováno v:
Symposium - International Astronomical Union. 107:487-490
We have used a self-consistent magnetohydrodynamics model to study the evolution of solar magnetic fields in an active region. The problem has been cast as an initial boundary-value problem based on explicit mathematical formalism (i.e., method of pr
Publikováno v:
Solar Physics. 86:159-171
Publikováno v:
International Astronomical Union Colloquium. 104:223-226
Simultaneous observations of a surge in Hα- and C IV are analysed in terms of Doppler velocities and “microturbulence”. The behaviour of both quantities suggests strong velocity shears with small spatial scales.
Publikováno v:
Astrophysics and Space Science. 83:189-194
A new ideal magnetohydrodynamic (MHD) model is used to examine the dynamical response of the upper solar atmosphere to the injection of cold mass from the photosphere, a surge perturbation. Theoretical results show that mass ejections from the photos
Autor:
W. Henze, E. Tandberg-Hanssen, M. J. Hagyard, B. E. Woodgate, R. A. Shine, J. M. Beckers, M. Bruner, J. B. Gurman, C. L. Hyder, E. A. West
Publikováno v:
Solar Physics. 81:231-244
The Ultraviolet Spectrometer and Polarimeter on the Solar Maximum Mission spacraft has observed for the first time the longitudinal component of the magnetic field by means of the Zeeman effect in the transition region above a sunspot. The data prese
Autor:
E. Tandberg-Hanssen, Chung-Chieh Cheng
Publikováno v:
International Astronomical Union Colloquium. 86:147-150
The transition region exhibits dynamic changes during solar flares. To understand the energy release and transport processes in solar flares, it is important to determine observationally the physical conditions in the flare transition region plasmas,
Autor:
J. M. Malville, E. Tandberg-Hanssen
Publikováno v:
Solar Physics. 39:107-119
Study of the longitudinal magnetic field in a number of active limb prominences showing fields in excess of 30 G. The objects fall into three groups: surges, caps, and active-region prominences. There appears to be an upper limit of 150 to 200 G for
Publikováno v:
Symposium - International Astronomical Union. 6:150-157
Prominences which extend into the million degree temperature region of the corona will, in the absence of magnetic fields, be heated up to temperatures of the same order of magnitude in the course of at most a few hours. A magnetic field of reasonabl