66 research outputs found
Spatial & Temporal Characteristics of Ha flares during the period 1975-2002 (comparison with SXR flares)
Although the energetic phenomena of the Sun (flares, coronal mass injections
etc.) exhibit intermittent stochastic behavior in their rate of occurrence,
they are well correlated to the variations of the solar cycle. In this work we
study the spatial and temporal characteristics of transient solar activity in
an attempt to statistically interpret the evolution of these phenomena through
the solar cycle, in terms of the self-organized criticality theory.Comment: Recent Advances in Astronomy and Astrophysics: 7th International
Conference of the Hellenic Astronomical Society. AIP Conference Proceedings,
Volume 848, pp. 194-198 (2006
A Study of Halo Coronal Mass Ejections and Related Flare and Radio Burst Observations in Solar Cycle 23
We present a statistical study of dynamical and kinetic characteristics of
CMEs which show temporal and spatial association with flares and type II radio
bursts or complex radio events of type II bursts and type IV continua. This
study is based on a set of earth-directed full halo CMEs occurring during the
present solar cycle, with data from the Large Angle Spectrometric Coronagraphs
(LASCO) and Extreme-Ultraviolet Imaging Telescope (EIT) aboard the Solar and
Heliospheric Observatory (SOHO) mission and the Magnetic Fields Investigation
(MFI) and 3-D Plasma and Energetic Particle Analyzer Investigation experiment
on board the WIND spacecraft.Comment: Recent Advances in Astronomy and Astrophysics: 7th International
Conference of the Hellenic Astronomical Society. AIP Conference Proceedings,
Volume 848, pp. 218-223 (2006
Type II Shocks Characteristics: Comparison with associated CMEs and Flares
A number of metric (100-650 MHz) typeII bursts was recorded by the ARTEMIS-IV
radiospectrograph in the 1998-2000 period; the sample includes both CME driven
shocks and shocks originating from flare blasts. We study their characteristics
in comparison with characteristics of associated CMEs and flares.Comment: Recent Advances in Astronomy and Astrophysics: 7th International
Conference of the Hellenic Astronomical Society. AIP Conference Proceedings,
Volume 848, pp. 238-242 (2006
Type II and IV radio bursts in the active period October-November 2003
In this report we present the Type II and IV radio bursts observed and
analyzed by the radio spectrograph ARTEMIS IV1, in the 650-20MHz frequency
range, during the active period October-November 2003. These bursts exhibit
very rich fine structures such fibers, pulsations and zebra patterns which is
associated with certain characteristics of the associated solar flares and
CMEs.Comment: Recent Advances in Astronomy and Astrophysics: 7th International
Conference of the Hellenic Astronomical Society. AIP Conference Proceedings,
Volume 848, pp. 199-206 (2006
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