Magnetic energy release on the Sun
Article Abstract:
Occurrences of explosive energy releases are fairly common on the Sun where temperatures rise above its surface temperature, and a magnetic field is often the only source of energy to power such explosions. The reasons for a sudden release of solar magnetism continue to be debated, with the process of magnetic reconnection seen as the most widely accepted explanation. A new report by D.E. Innes and colleagues provides evidence of bi-directional outflow jets, which are part of the reconnection process theory, as seen in the ultraviolet spectra from the ESA-NASA Solar and Heliospheric Observatory. The case for magnetic reconnection has also been reinforced by recent observations from the Yohkoh satellite.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Scaling of heating rates in solar coronal loops
Article Abstract:
In a study of the mechanism of heating of the solar corona it was revealed that the scaling properties displayed by coronal heating provide effective means for analyzing the heating mechanism. A statistical correlation between pressures and lengths of the coronal loops was observed, suggesting that the rate of heating is inversely proportional to the square of the loop length. A model of energy dissipation by stressed coronal magnetic fields, consistent with the theoretical models is discussed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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A 600-day periodicity in solar coronal holes
Article Abstract:
Infrared observations of the Sun's corona taken between 1977 and 1989 reveal that coronal holes occur in cycles of about 592 days. Coronal holes are regions of low density and temperature within the solar corona. The infrared data also show that the holes are distributed unevenly between the Sun's northern and southern hemispheres and exist for relatively long periods. These newly discovered features of the solar corona may influence both the Sun's magnetic flux and geomagnetism.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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