Results 191 to 200 of about 3,285 (232)

Solar filaments as tracers of subsurface processes

Journal of Astrophysics and Astronomy, 2000
AbstractSolar filaments are discussed in terms of two contrasting paradigms. The standard paradigm is that filaments are formed by condensation of coronal plasma into magnetic fields that are twisted or dimpled as a consequence of motions of the fields’ sources in the photosphere.
D M Rust
exaly   +2 more sources

Cyclical behavior of solar filaments

Astronomische Nachrichten, 2012
AbstractThe Carte Synoptique catalogue of solar filaments from 1919 March to 1957 July, corresponding to complete cycles 16‐18, is utilized to show the latitudinal migrations of solar filaments at low (≤50°) and high (>50°) latitudes and the latitudinal distributions of solar filaments for all solar filaments, solar filaments whose maximum lengths ...
P.X. Gao, X.J. Shi, Y. Li
exaly   +2 more sources

Large-scale motion of solar filaments

Journal of Astrophysics and Astronomy, 2000
AbstractPrecise measurements of heliographic position of solar filaments were used for determination of the proper motion of solar filaments on the time-scale of days. The filaments have a tendency to make a shaking or waving of the external structure and to make a general movement of whole filament body, coinciding with the transport of the magnetic ...
Pavel Ambrož, Alfred Schroll
openaire   +1 more source

Activity cycle of solar filaments

Journal of Astrophysics and Astronomy, 2007
Long-term variation in the distribution of the solar filaments observed at the Observatorie de Paris, Section de Meudon from March 1919 to December 1989 is presented to compare with sunspot cycle and to study the periodicity in the filament activity, namely the periods of the coronal activity with the Morlet wavelet used.
K. J. Li   +5 more
openaire   +1 more source

SOLAR FILAMENT STRUCTURE

1966
Abstract : A survey was made of the Lockheed solar patrol films in search of any parameters which could possible be linked with the occurrence of flares. High resolution observations ( or = 1 sec of arc) show that some filaments increase in darkness and become more sharply defined within several hours to several days before the onset of a flare ...
Sara F. Smith, Harry E. Ramsey
openaire   +1 more source

Failed Eruptions of Solar Filaments

Astronomy Reports, 2020
Solar filaments (prominences), which suddenly and swiftly ascend, i.e., become eruptive, sometimes decelerate and stop at comparatively low altitudes. Causes of failed eruptions generally remain uncertain. The present study analyzes two eruptive phenomena with very similar initial geometries and configurations of external magnetic fields; one of these ...
openaire   +1 more source

Eruption of a Bifurcated Solar Filament

Solar Physics, 2013
We study the partial eruption of a solar filament observed by the Solar Dynamics Observatory (SDO) and the Solar TErrestrial RElations Observatory-Ahead (STEREO-A) spacecraft on 9 May 2012. This filament was located in Active Region NOAA 11475 and consisted of two distinct branches, separated in height above the active region’s primary polarity ...
Chunming Zhu, David Alexander
openaire   +1 more source

Circular Polarization in a Solar Filament

Solar Physics, 2003
Integrating 26 624 pairs of video frames, the authors have mapped the circular polarization in an active-region filament against the solar disk by using a traditional magnetograph working at the Hβ line. This filament, offset the disk center, appeared at the boundary of three decayed active regions.
Jingxiu Wang   +3 more
openaire   +1 more source

Home - About - Disclaimer - Privacy