Results 11 to 20 of about 22,667 (274)

Prominence Eruptions [PDF]

open access: yesInternational Astronomical Union Colloquium, 1998
AbstractThe kinematics and dynamics of prominence eruptions are reviewed and different phases of the eruption are identified. The properties of the equation of motion in these phases are shown. The morphology of the prominence prior and during the eruption is described and the implications to the MHD description of the process are discussed.
openaire   +3 more sources

Helium Emissions Observed in Ground-Based Spectra of Solar Prominences [PDF]

open access: yes, 2012
The only prominent line of singly ionized helium in the visible spectral range, helium-II 4686 A, is observed together with the helium-I 5015 A singlet and the helium-I 4471 A triplet line in solar prominences.
Bianda, Michele   +3 more
core   +2 more sources

Effect of motions in prominences on the helium resonance lines in the extreme ultraviolet [PDF]

open access: yes, 2006
<b>Context</b>: Extreme ultraviolet resonance lines of neutral and ionised helium observed in prominences are difficult to interpret as the prominence plasma is optically thick at these wavelengths. If mass motions are taking place, as is the
Gouttebroze, P.   +2 more
core   +2 more sources

Tangled Magnetic Fields in Solar Prominences [PDF]

open access: yes, 2010
Solar prominences are an important tool for studying the structure and evolution of the coronal magnetic field. Here we consider so-called "hedgerow" prominences, which consist of thin vertical threads.
A. A. van Ballegooijen   +41 more
core   +1 more source

Automatic detection of limb prominences in 304 A EUV images [PDF]

open access: yes, 2009
A new algorithm for automatic detection of prominences on the solar limb in 304 A EUV images is presented, and results of its application to SOHO/EIT data discussed.
C. Cortes   +22 more
core   +2 more sources

Using Rapid Prosody Transcription to probe little-known prosodic systems: The case of Papuan Malay

open access: yesLaboratory Phonology, 2020
This paper shows how the Rapid Prosody Transcription method (RPT, cp. Cole & Shattuck-Hufnagel, 2016) can be utilized when investigating the prosodic systems of a little-described language.
Janina Kalbertodt   +3 more
doaj   +2 more sources

Dynamic disappearance of prominences and their geoeffectiveness [PDF]

open access: yesGeofísica Internacional, 2008
We study 14 cases of dynamic “disparition brusque” (DBd), the sudden disappearance of quiescent filaments/prominences, during two solar minima: 1985-1986 and 1994.
Z. Mouradian, L. Taliashvili, J. Páez
doaj   +3 more sources

Dissipative instability in partially ionised prominence plasmas [PDF]

open access: yes, 2015
We investigate the nature of dissipative instability at the boundary (seen here as tangential discontinuity) between the viscous corona and the partially ionised prominence plasma in the incompressible limit.
Alexandrou, Marios   +2 more
core   +2 more sources

Stellar Prominences [PDF]

open access: yesSymposium - International Astronomical Union, 1996
I review recent observational and theoretical progress in the study of condensations of cool material trapped in the coronae of rapidly rotating stars. Such condensations were discovered over a decade ago, producing transient moving absorption features in the optical Balmerseries lines.
openaire   +2 more sources

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