Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995lock.reptr....h&link_type=abstract
Technical Report, Lockheed Solar Observatory Palo Alto, CA United States
Physics
Solar Activity, Solar Flares, Stellar Flares, Sun, Stellar Physics, Astronomical Observatories, X Ray Sources, Emission, Climate Change, Astronomical Models, Ionizing Radiation, Stellar Radiation
Scientific paper
What is the importance of stellar X-ray flares to astrophysics, or even more, to the world at large? In the case of the Sun, changes in solar activity at the two temporal extremes can have quite significant consequences. Longterm changes in solar activity, such as the Maunder Minimum, can apparently lead to non-negligible alterations of the earth's climate. The extreme short term changes are solar flares, the most energetic of which can cause communications disruptions, power outages and ionizing radiation levels amounting to medical X-ray dosages on long commercial flights and even potentially lethal exposures for unshielded astronauts. Why does the Sun exhibit such behaviour? Even if we had a detailed knowledge of the relevant physical processes on the Sun - which we may be on the way to having in hand as evidenced by these Proceedings- our understanding would remain incomplete in regard to fundamental causation so long as we could not say whether the Sun is, in this respect, unique among the stars. This current paper discusses the stellar x-ray flare detections and astronomical models (quasi-static cooling model and two-ribbon model) that are used to observe the x-ray emission.
Haisch Bernhard
Hudson Hugh S.
Kosugi Taichi
Uchida Yoshiharu
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