Structure And Evolution Of The Large Scale Solar And Heliospheric Magnetic Fields
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Structure And Evolution Of The Large Scale Solar And Heliospheric Magnetic Fields
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Author : Jon Todd Hoeksema
language : en
Publisher:
Release Date : 1985
Structure And Evolution Of The Large Scale Solar And Heliospheric Magnetic Fields written by Jon Todd Hoeksema and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Cosmic magnetic fields categories.
Structure And Evoluton Of The Large Scale Solar And Heliospheric Magnetic Fields
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Author : J. T. Hoeksema
language : en
Publisher:
Release Date : 1984
Structure And Evoluton Of The Large Scale Solar And Heliospheric Magnetic Fields written by J. T. Hoeksema and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Structure and evolution of large scale photospheric and coronal magnetic fields in the interval 1976-1983 were studied using observations from the Stanford Solar Observatory and a potential field model. The solar wind in the heliosphere is organized into large regions in which the magnetic field has a componenet either toward or away from the sun. The model predicts the location of the current sheet separating these regions. Near solar minimum, in 1976, the current sheet lay within a few degrees of the solar equator having two extensions north and south of the equator. Soon after minimum the latitudinal extent began to increase. The sheet reached to at least 50 deg from 1978 through 1983. The complex structure near maximum occasionally included multiple current sheets. Large scale structures persist for up to two years during the entire interval. To minimize errors in determining the structure of the heliospheric field particular attention was paid to decreasing the distorting effects of rapid field evolution, finding the optimum source surface radius, determining the correction to the sun's polar field, and handling missing data. The predicted structure agrees with direct interplanetary field measurements taken near the ecliptic and with coronameter and interplanetary scintillation measurements which infer the three dimensional interplanetary magnetic structure. During most of the solar cycle the heliospheric field cannot be adequately described as a dipole.
Structure And Evolution Of The Large Scale Solar And Heliospheric Magnetic Fields
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Author : Jon Todd Hoeksema
language : en
Publisher:
Release Date : 1984
Structure And Evolution Of The Large Scale Solar And Heliospheric Magnetic Fields written by Jon Todd Hoeksema and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Cosmic magnetic fields categories.
An Atlas Of Photospheric Magnetic Field Observations And Computed Coronal Magnetic Fields 1976 1985
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Author : J. Todd Hoeksema
language : en
Publisher:
Release Date : 1986
An Atlas Of Photospheric Magnetic Field Observations And Computed Coronal Magnetic Fields 1976 1985 written by J. Todd Hoeksema and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Daily magnetogram observations of the large scale photospheric magnetic field have been made. These measurements provide a homogeneous record of the changing solar field through most of Solar Cycle 21. Using the photospheric data, the configuration of the coronal and heliospheric fields can be calculated using a Potential Field -- Source Surface model. This provides a 3 dimensional picture of the heliospheric field evolution during the solar cycle. This note announces the publication of UAG Report 94, an Atlas containing the complete set of synoptic charts of the measured photospheric magnetic field, the computed field at the source surface, and the coefficients of the multipole expansion of the coronal field. The general underlying structures of the solar and heliospheric fields, which determine the environment for solar terrestrial relations and provide the context within which solar activity related events occur, can be approximated from these data. The provision of a homogeneous dataset of the solar magnetic field over nearly an entire sunspot cycle in a convenient, inclusive package will stimulate the studies of the large scale structures of the solar and heliospheric magnetic field, encourage others to consider the relationship of the large scale, ambient field structures to activity on short time scales and smaller spatial scales, and enable the inclusion of the heliospheric field in analyses of solar terrestrial relations.
Solar Activity And Its Magnetic Origin Iau S233
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Author : Volker Bothmer
language : en
Publisher: Cambridge University Press
Release Date : 2006-12-25
Solar Activity And Its Magnetic Origin Iau S233 written by Volker Bothmer and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-12-25 with Science categories.
The variability of the Sun's magnetic field is the main driver of solar activity. IAU S233 was held to further our understanding of solar magnetic processes and its interplanetary consequences. The Symposium was organised into seven sessions covering: the generation and transport of solar magnetic fields; magnetic fields and coupling processes in the solar atmosphere, coronal heating and small-scale dynamics; large-scale coronal structure; the origin and evolution of the solar wind; flares, CMEs and SEPs; and new instrumentation and missions. Each session included contributions by world-wide leading scientists in the form of tutorials, research reviews and presentations of the latest results. A special eighth session was dedicated to educating young national and international astronomers. With reviews and research contributions covering a broad range of disciplines in solar and heliospheric research, this volume is a valuable interdisciplinary resource for professional astronomers and graduate students.
Report Uag
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Author : World Data Center A for Solar-Terrestrial Physics
language : en
Publisher:
Release Date : 1972
Report Uag written by World Data Center A for Solar-Terrestrial Physics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Atmosphere, Upper categories.
Literature 1985 Part 1
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Author : S. Böhme
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-12-11
Literature 1985 Part 1 written by S. Böhme 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 2013-12-11 with Science categories.
Astronomy and Astrophysics Abstracts aims to present a comprehensive documen tation of the literature concerning all aspects of astronomy, astrophysics, and their border fields. It is devoted to the recording, summarizing, and indexing of the relevant publications throughout the world. Astronomy and Astrophysics Abstracts is prepared by a special department of the Astronomisches Rechen-Institut under the auspices of the International Astronomical Union. Volume 39 records literature published in 1985 and received before August 15, 1985. Some older documents which we received late and which are not surveyed in earlier volumes are included too. We acknowledge with thanks contributions of our colleagues all over the world. We also express our gratitude to all organiza tions, observatories, and publishers which provide us with complimentary copies of their publications. On account of the introduction of an object index the scope of index information will be considerably enlarged beginning with this volume. In connection with the subject index an additional source to satisfy the needs of retrieval is opened up. Starting with Volume 33, all the recording, correction, and data processing work was done by means of computers. The recording was done by our technical staff members Ms. Helga Ballmann, Ms. Mona El-Choura, Ms. Monika Kohl, Ms. Sylvia Matyssek. Ms. Karin Burkhardt, Ms. Susanne Schlotelburg, and Mr. Stefan Wagner supported our task by careful proofreading. It is a pleasure to thank them all for their encouragement. Heidelberg, September 1985 The Editors Contents Introduction . . . . . . . . . . . .
Theory And Simulation Of The Evolution Of The Large Scale Solar Magnetic Field
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Author : Carl Richard DeVore
language : en
Publisher:
Release Date : 1986
Theory And Simulation Of The Evolution Of The Large Scale Solar Magnetic Field written by Carl Richard DeVore and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Solar magnetic fields categories.
Structure And Dynamics Of The Coronal Magnetic Field
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-11
Structure And Dynamics Of The Coronal Magnetic Field written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-11 with categories.
The last few years have seen a marked increase in the sophistication of models of the solar corona. This has been brought about by a confluence of three key elements. First, the collection of high-resolution observations of the Sun, both in space and time, has grown tremendously. The SOHO (Solar Heliospheric Observatory) mission is providing additional correlated high-resolution magnetic, white-light and spectroscopic observations. Second, the power and availability of supercomputers has made two- and three-dimensional modeling routine. Third, the sophistication of the models themselves, both in their geometrical realism and in the detailed physics that has been included, has improved significantly. The support from our current Space Physics Theory grant has allowed us to exploit this confluence of capabilities. We have carried out direct comparisons between observations and models of the solar corona. The agreement between simulated coronal structure and observations has verified that the models are mature enough for detailed analysis, as we will describe. The development of this capability is especially timely, since observations obtained from three space missions that are underway (Ulysses, WIND and SOHO) offer an opportunity for significant advances in our understanding of the corona and heliosphere. Through this interplay of observations and theory we can improve our understanding of the Sun. Our achievements thus far include progress modeling the large-scale structure of the solar corona, three-dimensional models of active region fields, development of emerging flux and current, formation and evolution of coronal loops, and coronal heating by current filaments. VanHoven, Gerard and Schnack, Dalton D. Goddard Space Flight Center NAG5-2257...
Magnetic Fields In The Solar Atmosphere
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Author : Jacques Maurice Beckers
language : en
Publisher:
Release Date : 1976
Magnetic Fields In The Solar Atmosphere written by Jacques Maurice Beckers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Magnetohydrodynamics categories.
This paper describes the magnetic field configurations observed in the solar atmosphere including the corona and the solar wind. The techniques for observing solar magnetic fields are briefly reviewed. The significance of Alfven waves in transporting energy is stressed. (Author).