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Mechanisms of Chromospheric and Coronal Heating

2013-06-29 Science
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Release : 2013-06-29
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Book Synopsis Mechanisms of Chromospheric and Coronal Heating by : Peter Ulmschneider

Download or read book Mechanisms of Chromospheric and Coronal Heating written by Peter Ulmschneider. This book was released on 2013-06-29. Available in PDF, EPUB and Kindle. Book excerpt: One of the great problems of astrophysics is the unanswered question about the origin and mechanism of chromospheric and coronal heating. Just how these outer stellar envelopes are heated is of fundamental importance, since all stars have hot chromospheric and coronal shells where the temperature rises to millions of degrees, comparable to the temperatures in the stars' cores. Here for the first time is a comprehensive inventory of the proposed chromospheric and coronal heating theories. The proposed heating processes are critically compared, and the observational evidence for the various mechanisms is reviewed. This is essential reading for all those working in such fields as stellar activity, radio and XUV emission, rotation, and mass loss, for whom a detailed and consistent presentation of our knowledge of chromospheric and coronal heating mechanisms is urgently needed.

Mechanisms of Chromospheric and Coronal Heating

1991-02-25 Science
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Release : 1991-02-25
Genre : Science
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Book Rating : 365/5 ( reviews)

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Book Synopsis Mechanisms of Chromospheric and Coronal Heating by : Peter Ulmschneider

Download or read book Mechanisms of Chromospheric and Coronal Heating written by Peter Ulmschneider. This book was released on 1991-02-25. Available in PDF, EPUB and Kindle. Book excerpt: One of the great problems of astrophysics is the unanswered question about the origin and mechanism of chromospheric and coronal heating. Just how these outer stellar envelopes are heated is of fundamental importance, since all stars have hot chromospheric and coronal shells where the temperature rises to millions of degrees, comparable to the temperatures in the stars' cores. Here for the first time is a comprehensive inventory of the proposed chromospheric and coronal heating theories. The proposed heating processes are critically compared, and the observational evidence for the various mechanisms is reviewed. This is essential reading for all those working in such fields as stellar activity, radio and XUV emission, rotation, and mass loss, for whom a detailed and consistent presentation of our knowledge of chromospheric and coronal heating mechanisms is urgently needed.

The Problem of Coronal Heating

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Book Rating : 734/5 ( reviews)

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Book Synopsis The Problem of Coronal Heating by : Philip Judge

Download or read book The Problem of Coronal Heating written by Philip Judge. This book was released on . Available in PDF, EPUB and Kindle. Book excerpt:

Rapid Magnetic Energy Release, Its Possible Role in Coronal Heating and Solar Wind Acceleration

1983
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Release : 1983
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Book Synopsis Rapid Magnetic Energy Release, Its Possible Role in Coronal Heating and Solar Wind Acceleration by : George L. Withbroe

Download or read book Rapid Magnetic Energy Release, Its Possible Role in Coronal Heating and Solar Wind Acceleration written by George L. Withbroe. This book was released on 1983. Available in PDF, EPUB and Kindle. Book excerpt: Studies of the EUV emission from coronal bright points, active regions and apicules suggest taht stochastic mechanisms may plan an important role in heating the solar atmosphere at chromospheric and coronal levels. In small magnetic bipolar regions (spatial extent 1') the observed EUV variations suggest that impulsive heating at chromospheric and coronal levels appears to be very important, possibly the dominant form of heating. The mechanism most likely involves rapid release of magnetic energy, possibly associated with the emergence of magnetic flux from lower levels into the chromosphere and corona. In larger scale ( 1') magnetic bipolar regions, there is evidence for both quasi-steady and impulsive heating, with quasi-steady heating dominating. This heating could be caused by either a mechanism such as steady-state current dissipation, or by a stochastic process whose integrated effect (resulting from the smoothing caused by finite radiative and conductive cooling times) yields a nearly constant radiative output. The widespread variability of the emission in spectral lines formed at transition region temperatures (100000

Literature 1991, Part 2

2013-06-29 Science
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Release : 2013-06-29
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Book Rating : 762/5 ( reviews)

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Book Synopsis Literature 1991, Part 2 by : Astronomisches Rechen-Institut

Download or read book Literature 1991, Part 2 written by Astronomisches Rechen-Institut. This book was released on 2013-06-29. Available in PDF, EPUB and Kindle. Book excerpt: "Astronomy and Astrophysics Abstracts" appearing twice a year has become oneof the fundamental publications in the fields of astronomy, astrophysics andneighbouring sciences. It is the most important English-language abstracting journal in the mentioned branches. The abstrats are classified under more than a hundred subject categories, thus permitting a quick survey of the whole extended material. The AAA is a valuable and important publication for all students and scientists working in the fields of astronomy and related sciences. As such it represents a necessary ingredient of any astronomical library all over the world.

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