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From the Outer Heliosphere to the Local Bubble

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Release : 2009-04-29
Genre : Science
Kind : eBook
Book Rating : 473/5 ( reviews)

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Book Synopsis From the Outer Heliosphere to the Local Bubble by : J.L. Linsky

Download or read book From the Outer Heliosphere to the Local Bubble written by J.L. Linsky. This book was released on 2009-04-29. Available in PDF, EPUB and Kindle. Book excerpt: Knowledge about the outer heliosphere and the interstellar medium, which were long treated as two separate fields, has improved dramatically over the past 25 years as a consequence of recent developments: The discovery of interstellar pickup ions and neutral helium inside the heliosphere, the determination of the interstellar hydrogen distribution in the heliosphere obtained using backscattered solar Lyman-alpha radiation, the prediction and subsequent detection of the hydrogen wall just outside of the heliopause, the development of detailed global models for the interaction of solar wind plasma with the interstellar medium, and most recently, direct in-situ plasma and field measurements inside of the heliosheath. At the same time, our understanding of the nearby galactic environment, including the composition and dynamics of the warm gas clouds and hot gas in the local bubble, has benefited greatly from absorption-line spectroscopy using nearby stars as background sources and dynamic modeling. The present volume provides a synopsis of these developments organised into seven sections: Dominant physical processes in the termination shock and heliosheath, three-dimensional shape and structure of the dynamic heliosphere, relation of the plasmas and dust inside and outside of the heliosphere, origin and properties of the very local interstellar medium, energy and pressure equilibria in the local bubble, physical processes in the multiphase interstellar medium inside of the local bubble, and the roles that magnetic fields play in the outer heliosphere and the local bubble. The last theme is probably the most basic of all as magnetic fields play important roles in most of the phenomena discussed here. The volume concludes with four papers providing the "big picture" by looking at the time evolution of both the heliosphere and the local bubble, looking beyond the local bubble, and finally addressing the challenges in modeling the interface between the two media.

The Heliosphere in the Local Interstellar Medium

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Release : 2012-12-06
Genre : Science
Kind : eBook
Book Rating : 821/5 ( reviews)

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Book Synopsis The Heliosphere in the Local Interstellar Medium by : Rudolf von Steiger

Download or read book The Heliosphere in the Local Interstellar Medium written by Rudolf von Steiger. This book was released on 2012-12-06. Available in PDF, EPUB and Kindle. Book excerpt: In summary, we can conclude that the contributions of the different ionization processes to the total ionization rate for the most abundant interstellar species are basically known. The ionization of the noble gases He and Ne is almost completely dominated by photoionization, whereas for H charge-exchange with the solar wind is most important. For other species, such as 0 and Ar, both processes contribute significantly. Electron impact ionization can typically contribute by '" 10% to the total rate in the inner Solar System. Because direct measurements of the solar EUV flux are not yet continuously available, the variation of the ionization rate over the solar cycle still contains a relatively large uncertainty. The recent measurements of pickup ion distributions and of the neutral helium gas provide an independent tool to determine the total ionization rate that can be used to cross calibrate with the results obtained for the individual ionization processes. Acknowledgements The authors are grateful to M. Allen for supplying us with new data on photoioniza tion cross-sections compiled by him. We thank also M. Gruntman for drawing our attention to and support in collecting the most recent data on charge-exchange cross-sections. D. R. was supported by grant No. 2 P03C. 004. 09 from the Com mittee for Scientific Research (Poland). This work was also supported in part through NASA contract NAS7-918, NSF Grant INT-911637, NASA Grant NAGW- 2579.

To the Edge of the Solar System and Beyond

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Release : 2004
Genre : Heliosphere (Astrophysics)
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis To the Edge of the Solar System and Beyond by : I. H. Cairns

Download or read book To the Edge of the Solar System and Beyond written by I. H. Cairns. This book was released on 2004. Available in PDF, EPUB and Kindle. Book excerpt:

The Outer Heliosphere

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Author :
Release : 2000
Genre : Cosmic rays
Kind : eBook
Book Rating : 248/5 ( reviews)

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Book Synopsis The Outer Heliosphere by : Klaus Scherer

Download or read book The Outer Heliosphere written by Klaus Scherer. This book was released on 2000. Available in PDF, EPUB and Kindle. Book excerpt:

Solar Journey: The Significance of Our Galactic Environment for the Heliosphere and Earth

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Release : 2006-09-12
Genre : Science
Kind : eBook
Book Rating : 573/5 ( reviews)

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Book Synopsis Solar Journey: The Significance of Our Galactic Environment for the Heliosphere and Earth by : P.C. Frisch

Download or read book Solar Journey: The Significance of Our Galactic Environment for the Heliosphere and Earth written by P.C. Frisch. This book was released on 2006-09-12. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts who created the field, this volume explores uncharted scientific territory, with articles discussing the effect of our galactic environment on the heliosphere, planetary system and Earth. Leading experts in diverse fields discuss the physical changes expected as the heliosphere adjusts to its galactic environment. Topics include the interaction between solar wind and interstellar dust and gas, cosmic ray modulation, magnetospheres, variations in the solar environment, and the cosmic ray isotope record preserved in paleoclimate data.

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