Observations Of The Outer Heliosphere
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Observations Of The Outer Heliosphere
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Author : COSPAR. Plenary Meeting
language : en
Publisher: Elsevier Science & Technology
Release Date : 1993
Observations Of The Outer Heliosphere written by COSPAR. Plenary Meeting and has been published by Elsevier Science & Technology this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Science categories.
Contains 38 papers, selected from the Symposium D2 of the COSPAR 29th Plenary meeting, held in Washington DC, USA, 28 August - 5 September 1992. Topics covered include: solar wind behaviour throughout the heliosphere; the heliospheric boundary regions; and time-dependent cosmic-ray modulation.
From The Outer Heliosphere To The Local Bubble
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Author : J.L. Linsky
language : en
Publisher: Springer
Release Date : 2009-04-29
From The Outer Heliosphere To The Local Bubble written by J.L. Linsky and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-04-29 with Science categories.
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.
Exploration Of The Outer Heliosphere And The Local Interstellar Medium
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2004-10-25
Exploration Of The Outer Heliosphere And The Local Interstellar Medium written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-10-25 with Science categories.
This report is the summary of a workshop held in May 2003 by the Space Studies Board's Committee on Solar and Space Physics to synthesize understanding of the physics of the outer heliosphere and the critical role played by the local interstellar medium (LISM) and to identify directions for the further exploration of this challenging environment.
The Outer Heliosphere The Next Frontiers
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Author : E. Marsch
language : en
Publisher: Elsevier
Release Date : 2001-09-19
The Outer Heliosphere The Next Frontiers written by E. Marsch and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-09-19 with Science categories.
The eleventh COSPAR colloquium The Outer Heliosphere: The Next Frontiers was held in Potsdam, Germany, from 24-28 July, 2000, and is the second dedicated to this subject after the first one held in Warsaw, Poland in 1989. Roughly a century has passed after the first ideas by Oliver Lodge, George Francis Fitzgerald and Kristan Birkeland about particle clouds emanating from the Sun and interacting with the Earth environment. Only a few decades after the formulation of the concepts of a continuous solar corpuscular radiation by Ludwig Bierman and a solar wind by Eugene Parker, heliospheric physics has evolved into an important branch of astrophysical research. Numerous spacecraft missions have increased the knowledge about the heliosphere tremendously. Now, at the beginning of a new millenium it seems possible, by newly developed propulasion technologies to send a spacecraft beyond the boundaries of the heliosphere. Such an Interstellar Proce will start the in-situ exploration of interstellar space and, thus, can be considered as the first true astrophysical spacecraft. The year 2000 appeared to be a highly welcome occassion to review the achievements since the last COSPAR Colloquia 11 years ago, to summarize the present developments and to give new impulse for future activities in heliospheric research.
The Heliosphere In The Local Interstellar Medium
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Author : John D. Richardson
language : en
Publisher: Springer
Release Date : 2023-11-23
The Heliosphere In The Local Interstellar Medium written by John D. Richardson and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-11-23 with Science categories.
"The Heliosphere in the Local Interstellar Medium", the Proceedings of the First ISSI Workshop 6-10 November 1995, Bern, Switzerland, edited by R. von Steiger, R. Lallement, and M.A. Lee and published in 1996, was the first International Space Science Institute (ISSI) book in the Space Sciences Series. This book covers the knowledge gained in the subsequent 27 years that revolutionized our understanding of the interaction of the heliosphere with the very local interstellar medium (VLISM). Entirely new regions of space have been explored! The Voyagers both crossed the termination shock, passed through the heliosheath, crossed the heliopause, and entered the interstellar medium. New Horizons was launched with more modern instrumentation and explores low-latitude regions of the outer heliosphere. Energetic neutral atoms observed by IBEX and CASSINI allowed exploration of the heliosphere over the whole sky. The initial reconnaissance of the heliosphere and VLISM is complete with in situ measurements, observations of energetic neutral atoms (ENAs), neutral VLISM H and He, UV emissions, and interstellar dust. This book is a collection reviews from experts in the many aspects of this field that describe the current state of knowledge of the heliosphere’s interaction with the interstellar medium, puzzles yet to be solved, and future plans to continue these studies.
The Heliosphere In The Local Interstellar Medium
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Author : Rudolf von Steiger
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
The Heliosphere In The Local Interstellar Medium written by Rudolf von Steiger and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
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.
Cosmic Winds And The Heliosphere
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Author : Jack Randolph Jokipii
language : en
Publisher: University of Arizona Press
Release Date : 1997-10
Cosmic Winds And The Heliosphere written by Jack Randolph Jokipii and has been published by University of Arizona Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-10 with Science categories.
Contributors examine the physics of wind origin and physical phenomena in winds, including heliospheric shocks, magnetohydrodynamic turbulence, and kinetic phenomena--and their interactions with surrounding media. Contributions range from studies of the interstellar cloud surrounding the solar system to solar wind interaction with comets.
Physics Of The Outer Heliosphere
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Author : S. Grzedzielski
language : en
Publisher: Elsevier
Release Date : 2013-10-22
Physics Of The Outer Heliosphere written by S. Grzedzielski and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Science categories.
This is the first volume in the new COSPAR Colloquia series which will provide a forum for an in-depth discussion on selective topics of importance to the international community. The International Heliospheric Study (IHS) was initially approved by COSPAR in 1982 when it was anticipated that the study would centre on the ESA/NASA Ulysses spacecraft. This mission was delayed until October 1990, but it was decided to commence the study in 1986 in order to exploit the existence of the Pioneer 10 and 11 and the Voyager 1 and 2 spacecraft in the outer heliosphere. The primary purpose of Physics of the Outer Heliosphere is to study the three-dimensional structure of the solar wind and interplanetary magnetic field carried by it, the propagation of energetic solar particles throughout the heliosphere and the modulation of galactic cosmic rays by the heliosphere. This volume provides information for scientists interested in spectroscopic studies of the local interstellar medium, galactic and solar cosmic ray populations in the outer heliosphere and also plasma and magnetic field aspects of the distant solar wind.
Physics Of The Outer Heliosphere
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Author : Vladimir Florinski
language : en
Publisher: American Institute of Physics
Release Date : 2004-10-20
Physics Of The Outer Heliosphere written by Vladimir Florinski and has been published by American Institute of Physics this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-10-20 with Science categories.
This volume consists of articles written by leading scientists in the field of heliospheric physics, analyzing the latest spacecraft measurements and theoretical models related to the solar wind interaction with the Local Interstellar Medium. Particular focus is on the puzzling Voyager cosmic-ray and magnetic field data in the vicinity of the termination shock, and their possible theoretical interpretations. The purposes of future spacecraft missions and modeling issues are also discussed. Topics include: global structure of the outer heliosphere; spacecraft measurements: present and future; galactic and anomalous cosmic rays; shock structure, turbulence and kinetic physics; and remote sensing of the distant heliosphere and Local Interstellar Medium.
The Heliosphere Through The Solar Activity Cycle
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Author : A. Balogh
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-12-08
The Heliosphere Through The Solar Activity Cycle written by A. Balogh and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-12-08 with Science categories.
Understanding how the Sun changes though its 11-year sunspot cycle and how these changes affect the vast space around the Sun – the heliosphere – has been one of the principal objectives of space research since the advent of the space age. This book presents the evolution of the heliosphere through an entire solar activity cycle. The last solar cycle (cycle 23) has been the best observed from both the Earth and from a fleet of spacecraft. Of these, the joint ESA-NASA Ulysses probe has provided continuous observations of the state of the heliosphere since 1990 from a unique vantage point, that of a nearly polar orbit around the Sun. Ulysses’ results affect our understanding of the heliosphere from the interior of the Sun to the interstellar medium - beyond the outer boundary of the heliosphere. Written by scientists closely associated with the Ulysses mission, the book describes and explains the many different aspects of changes in the heliosphere in response to solar activity. In particular, the authors describe the rise in solar activity from the last minimum in solar activity in 1996 to its maximum in 2000 and the subsequent decline in activity.