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Microflares as Possible Sources for Coronal Heating
Solar flares: microflares, Fe line feature coronal heating
2009/5/6
We present a preliminary study of 27 microflares observed
by Solar X-ray Spectrometer (SOXS) mission during July 2003 to August
2006. We found that all 27 microflares show the Fe-line feature peakin...
Ultraviolet Spectroscopic Observations of Coronal Streamers in the SOHO Era
Sun corona ultraviolet
2009/5/6
Measurements made with the Ultraviolet Coronagraph Spectrometer
(UVCS) on the Solar and Heliospheric Observatory can be used
to determine physical parameters in the solar corona such as hydrogen
a...
Wave Heating of the Solar Chromosphere
Sun: chromosphere, oscillations heating and dynamics acoustic waves magnetic waves
2009/5/6
The nonmagnetic interior of supergranulation cells has been
thought since the 1940s to be heated by the dissipation of acoustic waves.
But all attempts to measure the acoustic flux have failed to sh...
Spatially Resolved Images and Solar Irradiance Variability
Solar chromosphere: spatially resolved images chromospheric features irradiance variability
2009/5/6
The Sun is the primary source of energy that governs both
the terrestrial climate and near-earth space environment. Variations in UV
irradiances seen at earth are the sum of global (solar dynamo) to...
Models of Solar Irradiance Variations：Current Status
Sun: activity, faculae, plages, magnetic fields solar irradiance solar-terrestrial relations sunspots
2009/5/6
Regular monitoring of solar irradiance has been carried out
since 1978 to show that solar total and spectral irradiance varies at different
time scales. Whereas variations on time scales of minutes ...
X-ray Emission from Solar Flares
Solar flares X-ray detectors X-ray line emission and continuum break energy microflares
2009/5/6
Solar X-ray Spectrometer (SOXS), the first space-borne solar
astronomy experiment of India was designed to improve our current understanding
of X-ray emission from the Sun in general and solar flare...
Solar Flare Physics Enlivened by TRACE and RHESSI
Solar flares particle acceleration hard X-rays
2009/5/6
The Transition Region and Coronal Explorer (TRACE) gave us
the highestEUVspatial resolution and the Ramaty High Energy Solar Spectrometric
Imager (RHESSI) gave us the highest hard X-ray and gammara...
Magnetic and Velocity Field Variations in the Active Regions NOAA 10486 and NOAA 10488
Sun: magnetogram Sun: Dopplergram Sun: flare
2009/5/6
We study the magnetic and velocity field evolution in the
two magnetically complex active regions NOAA 10486 and NOAA 10488
observed during October–November 2003.We have used the available data
to ...
Helioseismic Effects of Energetic Transients
Helioseismic effects solar activity solar transients
2009/5/6
Photospheric and chromospheric signatures related to large,
energetic transients such as flares and CMEs, have been extensively
reported during the last several years. In addition, energetic solar t...
Seismic Study of Magnetic Field in the Solar Interior
Sun oscillations interior magnetic field
2009/5/6
Magnetic field in the solar interior contributes to the even order
splitting coefficients, but it is not possible to separate the effect of magnetic
field from those due to other deviations from sph...
Helioseismology and the Solar Cycle：Past, Present and Future
Helioseismology solar activity cycle tachocline farsideimaging
2009/5/6
A major goal of helioseismology is to understand the
mechanism of the solar cycle. In this paper, some results of helioseismic
observations relevant to the cycle are briefly reviewed, the current st...
Prediction of Peaks in Wolf Numbers in Cycle-24 according to Actual Numbers of Polar Faculae
Polar faculae sunspots dynamo Wolf number
2009/5/6
Previous investigations by Makarov et al. have shown a relation
between the peaks in the number of polar faculae and the peaks in the
Wolf number. In cycles 20 and 22 the delay between peaks in pola...
The Evolution of Vector Magnetic Field Associated with Major Flares in NOAA AR10656
Magnetic field evolution flares
2009/5/6
In this paper, we study the evolution of vector magnetic
field of AR 10656 by using the observations of Huairou Solar Observing
Station (HSOS, China) and Big Bear Solar Observatory (BBSO, USA).
Th...
Concept of magnetic/current helicity was introduced to solar
physics about 15 years ago. Earlier studies led to discovery of such fundamental
properties as hemispheric helicity rule, and role of he...
Although we have reliable data of solar polar fields only
from the mid-1970s, it seems that the polar field at a minimum is well
correlated with the next cycle, but the strength of the cycle is not ...