Search results for: physics-of-the-solar-corona

Physics of the Solar Corona

Author : Markus Aschwanden
File Size : 37.3 MB
Format : PDF, ePub, Mobi
Download : 372
Read : 1315
Download »
A thorough introduction to solar physics based on recent spacecraft observations. The author introduces the solar corona and sets it in the context of basic plasma physics before moving on to discuss plasma instabilities and plasma heating processes. The latest results on coronal heating and radiation are presented. Spectacular phenomena such as solar flares and coronal mass ejections are described in detail, together with their potential effects on the Earth.

Physics of the Solar Corona and Transition Region

Author : Oddbjorn Engvold
File Size : 90.54 MB
Format : PDF, ePub
Download : 599
Read : 681
Download »
Proceedings of the Monterey Workshop, held in Monterey, California, August 1999

The Solar Corona

Author : Leon Golub
File Size : 48.55 MB
Format : PDF, Mobi
Download : 644
Read : 834
Download »
Second edition graduate level textbook giving an up-to-date treatment of our understanding of the solar corona.

The High Energy Solar Corona Waves Eruptions Particles

Author : Karl L. Klein
File Size : 53.30 MB
Format : PDF, Docs
Download : 226
Read : 1044
Download »
An outgrow of an earlier workshop held by the community of European Solar Radio Astronomers (CESRA), this topical volume collects reviews on the current multiwavelength findings and perspectives from the space missions RHESSI, TRACE and SOTTO. The aspects of solar physics dealt with are particle acceleration during flares, large-scale disturbances, and coronal plasma physics.

The Physics of the Solar Corona and Transition Region

Author : Oddbjorn Engvold
File Size : 53.91 MB
Format : PDF, Mobi
Download : 784
Read : 1317
Download »
The Sun's magnetic field is responsible for the spectacularly dynamic and intricate phenomenon that we call the corona. The past decade has seen an enormous increase in our understanding of this part of the solar outer atmosphere, both as a result of observations and because of rapid advances in numerical studies. The YOHKOH satellite has observed the Sun now for over six years, producing spectacular sequences of images that convey the complexity of the corona. The imaging and spectroscopic instruments on SOHO have added information on the cooler part of the corona. And since April of 1998 TRACE has given us very high resolution images of the 1-2 MK corona, at cadences that allow detailed observations of field oscillations, loop evolution, mass ejecta, etc. This volume contains papers contributed to a workshop (held in August 1999, in Monterey, California) that was dedicated to an exploration of the most recent results on the solar corona, as well as on the transition region and low solar wind. The diverse presentations at the meeting revolved around one key theme: the entire outer atmosphere of the Sun is intrinsically dynamic, evolving so rapidly that even the concept of a single local temperature for a single fluid often breaks down. Moreover, the corona is an intrinsically nonlinear and nonlocal medium. These aspects are discussed in these proceedings that include both papers that review recent developments (both based on observations and on theoretical/numerical modeling), and original research papers based on observations from many different observatories. The papers presented at the meeting add up to such a size that they are distributed over two Topical Issues of Solar Physics (December 1999 and April 2000), which are reprinted in these bound volumes.

Physics of the Inner Heliosphere I

Author : Rainer Schwenn
File Size : 31.93 MB
Format : PDF, Kindle
Download : 221
Read : 1105
Download »
Physics of the Inner Heliosphere gives for the first time a comprehensive and complete summary of our knowledge of the inner solar system. Using data collected over more than 11 years by the HELIOS twin solar probes, one of the most successful ventures in unmanned space exploration, the authors have compiled 10 extensive reviews of the physical processes of the inner heliosphere and their connections to the solar atmosphere. Researchers and advanced students in space and plasma physics, astronomy, and solar physics will be surprised to see just how closely the heliosphere is tied to the sun and how sensitively it depends on our star. The four chapters of Volume I of the work deal with large-scale phenomena: - observations of the solar corona - the structure of the interplanetary medium - the interplanetary magnetic field - interplanetary dust.

Coronal Magnetometry

Author : Steven Tomczyk
File Size : 82.25 MB
Format : PDF, ePub
Download : 173
Read : 553
Download »
Captures advances being made in the field of coronal magnetism, from theory to observations and instrumentation. This volume is a collection of research articles on the subject of the solar corona, and particularly, coronal magnetism. The book was motivated by the Workshop on Coronal Magnetism: Connecting Models to Data and the Corona to the Earth, which was held 21 - 23 May 2012 in Boulder, Colorado, USA. This workshop was attended by approximately 60 researchers. Articles from this meeting are contained in this topical issue, but the topical issue also contains contributions from researchers not present at the workshop. This volume is aimed at researchers and graduate students active in solar physics. Originally published in Solar Physics, Vol. 288, Issue 2, 2013 and Vol. 289, Issue 8, 2014.

Plasma Loops in the Solar Corona

Author : R. J. Bray
File Size : 74.33 MB
Format : PDF, Docs
Download : 298
Read : 729
Download »
A comprehensive account of the properties of plasma loops, the fundamental structural elements of the solar corona. Plasma loops cover a wide range of sizes and range in temperature from tens of thousands to millions of degrees. They not only define the structure of individual active regions but connect different active regions--even across the solar equator. Loops also play an integral and decisive role in the enormous solar explosions called flares. Over recent years a wealth of space and ground-based observations of loops has been obtained in various widely-spaced regions of the electromagnetic spectrum. In this book the authors have selected the best observational material from the literature on which to base a detailed account of the properties of flare and non-flare loops. The book also explores the larger implications of the loop structures for our understanding of solar and stellar coronae. The text is enhanced by a large number of illustrations and unique and beautiful photographs obtained from the ground and from space.

A Guide to the Solar Corona

Author : Donald E. Billings
File Size : 70.27 MB
Format : PDF, ePub, Docs
Download : 245
Read : 966
Download »
A Guide to the Solar Corona is specifically directed to the space scientist or engineer who is not a specialist in solar physics, but whose work requires a fairly detailed knowledge of the corona. It is hoped that the material may prove useful to most graduate students in astrophysics, while solar physicists may find some topics of interest and value to them. The book contains 12 chapters and begins with three descriptive chapters that provide the casual reader with a concept of the corona as it is evident through more or less direct observation. Topics covered include the development of coronal science, observational techniques, and observational aspects of the corona. The next chapter discusses methods of analyzing coronal data. Subsequent chapters present theoretical considerations as they are applicable to the corona. These combine theory with observation to provide a description of the various aspects of the corona. The final chapter is a combination of established ideas and speculation on the place of the corona in the universe.

Coronal Mass Ejections

Author : Timothty Howard
File Size : 21.52 MB
Format : PDF, ePub, Mobi
Download : 467
Read : 655
Download »
The book introduces the solar coronal mass ejection phenomena. This includes both those observed in the corona and those further from the Sun, known as interplanetary coronal mass ejections. We discuss the history and physics behind these phenomena, theories describing their launch and evolution, association with other solar eruptive phenomena, and methods employed for their detection and scientific data extraction. Instruments used for their study (past, present and future) are also discussed, along with their resulting space weather effects on Earth and other planets. The latter requires a description of the Earth’s magnetosphere, which is also included. Coronal Mass Ejections brings together solar physics, heliospheric physics, and magnetospheric physics, three traditionally separate fields of study. The content is accessible to beginning graduate students who are trying to master difficult fundamental concepts.

An Introduction to Plasma Astrophysics and Magnetohydrodynamics

Author : Marcel Goossens
File Size : 77.55 MB
Format : PDF
Download : 735
Read : 917
Download »
Most of the visible matter in the universe exists in the plasma state. Plasmas are of major importance for space physics, solar physics, and astrophysics. On Earth they are essential for magnetic controlled thermonuclear fusion. This textbook collects lecture notes from a one-semester course taught at the K.U. Leuven to advanced undergraduate students in applied mathematics and physics. A particular strength of this book is that it provides a low threshold introduction to plasmas with an emphasis on first principles and fundamental concepts and properties. The discussion of plasma models is to a large extent limited to Magnetohydrodynamics (MHD) with its merits and limitations clearly explained. MHD provides the students on their first encounter with plasmas, with a powerful plasma model that they can link to familiar classic fluid dynamics. The solar wind is studied as an example of hydrodynamics and MHD at work in solar physics and astrophysics.

Lectures on Solar Physics

Author : H.M. Antia
File Size : 71.89 MB
Format : PDF, ePub
Download : 761
Read : 742
Download »
This volume has grown out of lectures addressing primarily graduate students and researchers working in related areas in both astrophysics and space sciences. All contributions are self-contained and do not require prior in-depth knowledge of solar physics. The result is a unique textbook that fulfills the needs of those wishing to have a pedagogic exposition of solar physics bringing them up-to-date in a field full of vitality and with exciting research.

Coronal Physics from Radio and Space Observations

Author : Gerard Trottet
File Size : 84.63 MB
Format : PDF, Docs
Download : 432
Read : 475
Download »
This volume provides an overview of our current understanding of the physics related to: coronal structures and coronal heating; large-scale coronal shock waves and coronal mass ejections; particle beams in the solar corona and in the interplanetary medium; and explosive energy-release phenomena and particle acceleration. The different articles give a well-balanced presentation of relevant observations based upon various techniques, models and theories, providing a global view of these phenomena and of the underlying physics. In-situ measurements of particles and waves with ULYSSES and WIND and spectral and imaging data from SOHO and YOHKOH provide an unprecedented richness of relevant data. For their better understanding, radio observations - also included in this book - play a key role.

Mass Supply and Flows in the Solar Corona

Author : Bernhard Fleck
File Size : 44.5 MB
Format : PDF, Kindle
Download : 125
Read : 626
Download »
nd The 2 SORO Workshop on "Mass Supply and Flows in the Solar Corona" was held in Marciana Mariana on the island of Elba, Italy, in the week September 27 to October 1, 1993, as part of a series of workshops planned by the Solar Corona and Particles Working Group of the SOHO Science Working Team (SWT). The purpose of this workshop series is to acquaint the solar community with the capabilities of SORO, and prepare scientific projects and observing plans for the mission. This Workshop, which was at tended by more than one hundred scientists from different countries, focused on the following topics: 1) Fine Scale Structures 2) Loops and Prominences 3) Coronal Streamers 4) Coronal Roles and Solar Wind Each of these four topics was introduced by an observational and a theo retical overview highlighting the most recent advances in their area. A third review illustrated how SORO might help in solving open problems. Oral pa pers and poster presentations were followed by Working Group sessions. On the last day of the Workshop the Group Leaders reported on the activities of their Working Group. These proceedings include most of the papers presented at the Work shop, including the poster papers and Working Group reports by the Group Leaders as well as two overview papers of the SORO mission. All papers have been refereed.

Physics of the Invisible Sun

Author : Ashok Ambastha
File Size : 36.28 MB
Format : PDF, ePub, Docs
Download : 489
Read : 226
Download »
Physics of the invisible Sun: Instrumentation, Observations, and Inferences provides a new updated perspectives of the dramatic developments in solar physics mainly after the advent of the space era. It focusses on the instrumentation exploiting the invisible windows of the electromagnetic spectrum for observing the outer, fainter layers of the Sun. It emphasizes on the several technical and observational challenges and proceeds to discuss the discoveries related to energetic phenomena occurring in the transition region and corona. The book begins with giving a brief glimpse of the historical developments during the pre-, and post-telescopic periods of visible and spectroscopic techniques, ground-based optical and radio observing sites. Various types of telescopes and back-end instrumentation are presented based on photometry, spectroscopy, and polarimetry using the Zeeman and Hanle effects for measurement of magnetic fields, and Doppler effect for radial velocity measurements. The book discusses theoretical and observational inferences based on detection of solar neutrinos, and helioseismology as the probes of the hidden solar interior, and tests of solar standard models. The characteristic properties and observational signatures of global solar p- and g-oscillations modes, developments in local helioseismology and asteroseismology are discussed. The role of the solar magnetic field and differential rotation in the activity and magnetic cycles, prediction methodologies, and dynamo models are described. Observing the Sun in IR at the longer, and the UV, EUV, XUV, X-rays, and gamma-rays at the shorter wavelengths are covered in detail. Observational challenges at each of these wavelengths are presented followed by the instrumentation for detection and imaging that have resulted in enhancing the understanding of various solar transient phenomena, such as, flares and CMEs. The outer most corona is described as a dynamic, expanding component of the Sun from the theoretical and observational perspectives of the solar wind. It then discusses the topics of the Interplanetary magnetic field, slow and fast solar wind, interaction with magnetised and non-magnetised objects of the solar system, the space weather and the physics of the heliosphere. The chapter on the future directions in solar physics presents a brief overview of the new major facilities in various observing windows, and the future possibilities of observing the Sun from ground and vantage locations in space. Features: Systematic overview of the developments in instrumentation, observational challenges and inferences derived from ground-based and space-borne solar projects. Advances in the understanding about the solar interior from neutrinos and helioseismology. Recent research results and future directions from ground- and space-based observations. This book may serve as a reference book for scientific researchers interested in multi-wavelength instrumentation and observational aspects of solar physics. It may also be used as a textbook for a graduate-level course.

Synoptic Observations of the Solar Corona During Carrington Rotations 1580 1596 11 October 1971 15 January 1973

Author : R. A. Howard
File Size : 45.2 MB
Format : PDF
Download : 361
Read : 709
Download »

Magnetic Helicity Spheromaks Solar Corona Loops And Astrophysical Jets

Author : Bellan Paul M
File Size : 39.23 MB
Format : PDF, ePub, Mobi
Download : 541
Read : 1009
Download »
Pedagogical in style, this book provides insights into plasma behavior valid over twenty orders of magnitude in both time and space. The book assumes that the reader has a basic knowledge of magnetohydrodynamics and explains topics using detailed theoretical analysis supported by discussion of relevant experiments. This comprehensive approach gives the reader an understanding of the essential theoretical ideas and their application to real situations. The book starts by explaining the topological concept of magnetic helicity and then develops a helicity-based model that predicts the ultimate state towards which magnetically-dominated plasmas evolve. The model predicts that no matter how messy or complicated the dynamics, a great range of plasma configurations always self-organize to a unique, simple final state. This self-organization, called relaxation, is a fundamental concept that unifies understanding of spheromaks, solar corona loops, interplanetary magnetic clouds, and astrophysical jets. After establishing why relaxation occurs, the book then examines how relaxation occurs. It shows that relaxation involves a sequence of complex non-equilibrium dynamics including fast self-collimated plasma jets, kink instabilities, magnetic reconnection, and phenomena outside the realm of magnetohydrodynamics. Contents: IntroductionBasic ConceptsMagnetic HelicityRelaxation of an Isolated Configuration to the Taylor StateRelaxation in Driven ConfigurationsThe MHD Energy Principle, Helicity, and Taylor StatesSurvey of Spheromak Formation SchemesClassification of Regimes: An Imperfect Analogy to ThermodynamicsAnalysis of Isolated Cylindrical SpheromaksThe Role of the WallAnalysis of Driven Spheromaks: Strong CouplingHelicity Flow and DynamosConfinement and Transport in SpheromaksSome Important Practical IssuesBasic Diagnostics for SpheromaksApplications of SpheromaksInitial Dynamics Leading to Relaxation: MHD JetsDynamics Associated with Relaxation: Kinks, Rayleigh-Taylor, Hard X-RaysBeyond MHD: Whistler Waves and Fast Magnetic ReconnectionZero-β Models for Solar and Space Phenomena: Helicity, Force-Free EquilibriaFinite-β Models and Experiments for Solar Phenomena: Collimation, Flows, ExpansionBeyond MHD: Extreme Particle Orbits in Helical Magnetic FieldsFinite-β Toroidal Magnetic Cloud ModelAstrophysical Jets, Accretion, Angular Momentum Removal, and Space DynamosAppendices: Vector Identities and OperatorsBessel Orthogonality RelationsCapacitor BanksTransmission Lines, Pulse Forming Networks, and TransformersSelected Formulae Readership: Researchers, graduate students, and advanced undergraduates in plasma physics, solar physics, and astrophysics; mathematicians interested in helicity, topology, and self-organization. Keywords: Magnetohydrodynamics;Magnetic Helicity;Spheromaks;MHD;MHD Jets;Kink;Rayleigh Taylor;Accretion Disk;Astrophysical Jet;Solar Prominence;Solar Corona;Solar Corona Loop;CME;Relative Helicity;Taylor Relaxation;Magnetic Reconnection;Whistler Waves;Hall MHD;Electron MHD;Alfven Waves;Magnetic Clouds;Canonical Angular Momentum;Magnetic BrakingReview: Key Features: Unique, no completing titlesThis new revision contains discussion of dynamics underlying self-organization (Taylor relaxation)This new revision contains updates on spheromak research since 2000

Physics of Solar Planetary Environments Vols I II

Author :
File Size : 41.76 MB
Format : PDF, Mobi
Download : 560
Read : 789
Download »

Solar Wind Ten

Author : Marco Velli
File Size : 73.31 MB
Format : PDF, Kindle
Download : 614
Read : 264
Download »
The Tenth Solar Wind conference describes the latest results in the physics of the outer solar atmosphere, the solar wind, and the interplanetary medium which together comprise the heliosphere. The conference brought together researchers studying the sun and its influence on the earth’s space environment both from an experimental and theoretical point of view. The effect of the solar magnetic field in shaping and accelerating the solar wind throughout the solar cycle, via coronal heating and coronal mass ejections was described in unprecedented clarity and breadth, thanks to both satellite experiments and numerical modelling. The conference proceedings is of interest to researchers in space science and the geomagnetic effects of solar activity, plasma physicists and astrophysicists as well as other scientists interested in the life of our mother star.

Physics of the Sun

Author : P.A. Sturrock
File Size : 37.78 MB
Format : PDF
Download : 705
Read : 1144
Download »
This volume, together with its two companion volumes, originated in a study commis sioned by the United States National Academy of Sciences on behalf of the National Aeronautics and Space Administration. A committee composed of Tom Holzer, Dimitri Mihalas, Roger Ulrich and myself was asked to prepare a comprehensive review of current knowledge concerning the physics of the Sun. We were fortunate in being able to persuade many distinguished scientists to gather their forces for the preparation of 21 separate chapters covering not only solar physics but also relevant areas of astrophysics and solar-terrestrial relations. It proved necessary to divide the chapters into three separate volumes that cover three different aspects of solar physics. Volumes II and III are concerned with 'The Solar Atmosphere' and with 'Astrophysics and Solar-Terrestrial Relations'. This volume is devoted to 'The Solar Interior', except that the volume begins with one chapter reviewing the contents of all three volumes. Our study of the solar interior includes a review of nuclear, atomic, radiative, hydrodynamic and hydromagnetic processes, together with reviews of three areas of active current investigation: the dynamo mechanism, internal rotation and magnetic fields, and oscillations. The last topic, in particular, has emerged in recent years as one of the most exciting areas of solar research.