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AIP Conference Proceedings, 2000
Despite of the large number of models and mechanisms proposed in the literature, the problem of the heating of the solar corona is still unsolved and represents one of the challenge of solar physics. In this context, a basic question to be addressed by any viable theoretical model concerns understanding the mechanism capable of transferring ...
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Despite of the large number of models and mechanisms proposed in the literature, the problem of the heating of the solar corona is still unsolved and represents one of the challenge of solar physics. In this context, a basic question to be addressed by any viable theoretical model concerns understanding the mechanism capable of transferring ...
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Nature, 1942
THE difficulties which have so far been experienced in working out a physical theory of the solar corona (vide Rosseland, “Theoretical Astrophysics”, Chap. 14) have apparently been increased by the discovery of Grotrian and Edlen that many of these lines are due to forbidden transitions of highly stripped atoms of iron and nickel having the ...
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THE difficulties which have so far been experienced in working out a physical theory of the solar corona (vide Rosseland, “Theoretical Astrophysics”, Chap. 14) have apparently been increased by the discovery of Grotrian and Edlen that many of these lines are due to forbidden transitions of highly stripped atoms of iron and nickel having the ...
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Science News, 1976
The connection between things that happen on the sun and things that happen on the earth has been manifest for so long that the sun has often been worshipped as a god with power over terrestrial destinies. Since the dawning of the scientific age, the connections have been regarded as more physical than supernatural, but a number of them have been long ...
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The connection between things that happen on the sun and things that happen on the earth has been manifest for so long that the sun has often been worshipped as a god with power over terrestrial destinies. Since the dawning of the scientific age, the connections have been regarded as more physical than supernatural, but a number of them have been long ...
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Annual Review of Astronomy and Astrophysics, 2001
We focus on new observational capabilities (Yohkoh, SoHO, TRACE), observations, modeling approaches, and insights into physical processes of the solar corona. The most impressive new results and problems discussed in this article can be appreciated from the movies available on the Annual Reviews website and at http://www.lmsal.com/pub/araa/araa.html .
Markus J. Aschwanden +2 more
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We focus on new observational capabilities (Yohkoh, SoHO, TRACE), observations, modeling approaches, and insights into physical processes of the solar corona. The most impressive new results and problems discussed in this article can be appreciated from the movies available on the Annual Reviews website and at http://www.lmsal.com/pub/araa/araa.html .
Markus J. Aschwanden +2 more
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1988
The structure of the quiet solar corona is considered, excluding the effect of magnetic active regions. Starting with a simple one-dimensional geometry, models are derived both from ab initio theory and from analysis of spectral line intensities. To overcome the inconsistencies which arise, account is taken progressively of two-dimensional effects; the
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The structure of the quiet solar corona is considered, excluding the effect of magnetic active regions. Starting with a simple one-dimensional geometry, models are derived both from ab initio theory and from analysis of spectral line intensities. To overcome the inconsistencies which arise, account is taken progressively of two-dimensional effects; the
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Astrophysics and Space Science, 1996
The solar corona, and the coronae of solar-type stars, consist of a low-density magnetized plasma at temperatures exceeding 106 K. The primary coronal emission is therefore in the UV and soft x-ray range. The observed close connection between solar magnetic fields and the physical parameters of the corona implies a fundamental role for the magnetic ...
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The solar corona, and the coronae of solar-type stars, consist of a low-density magnetized plasma at temperatures exceeding 106 K. The primary coronal emission is therefore in the UV and soft x-ray range. The observed close connection between solar magnetic fields and the physical parameters of the corona implies a fundamental role for the magnetic ...
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Highlights of Astronomy, 2005
A typical temperature for the quiet solar corona is ~ 1.5 x 106K, whereas the photosphere – the likely source of the thermal energy – has a temperature less than 6 × 103 K. Although many theories have been advanced to explain why the corona is so much hotter than the photosphere, this old problem remains unsolved. However, there is a mechanism based on
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A typical temperature for the quiet solar corona is ~ 1.5 x 106K, whereas the photosphere – the likely source of the thermal energy – has a temperature less than 6 × 103 K. Although many theories have been advanced to explain why the corona is so much hotter than the photosphere, this old problem remains unsolved. However, there is a mechanism based on
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Scientific American, 1983
In the past decade what is known about the corona has been vastly enlarged by instruments on the ground and on spacecraft, manned and unmanned. The corona is observed to be in a continuous state of flux, punctuated by periodic explosive outbursts. From spectroscopic observations the temperature of the corona is estimated to be between one and two ...
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In the past decade what is known about the corona has been vastly enlarged by instruments on the ground and on spacecraft, manned and unmanned. The corona is observed to be in a continuous state of flux, punctuated by periodic explosive outbursts. From spectroscopic observations the temperature of the corona is estimated to be between one and two ...
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2018
After relaying Linda’s story to a couple of agile transformation consultants, I asked, “So how’d she do it?”
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After relaying Linda’s story to a couple of agile transformation consultants, I asked, “So how’d she do it?”
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