High Energy Solar Physics

Author : R. Ramaty,Natalie Mandzhavidze,Xin-Min Hua
Publisher : A I P Press
Page : 568 pages
File Size : 53,5 Mb
Release : 1996
Category : Science
ISBN : UOM:39015037842054

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High-Energy Solar Physics by R. Ramaty,Natalie Mandzhavidze,Xin-Min Hua Pdf

Annotation Reports on recent developments in the study of solar flares, emphasizing work at high energies and addressing such persistent problems of the processes of flare energy release, particle acceleration, and accelerated particle transport and interaction. After reviewing the history of understanding about solar flare particle acceleration since 1942, the 53 papers cover energetic charged particles, x-rays, radio emission, and the theory of particle acceleration. Among the specific topics are high energy particle in interplanetary space on 11 June 1991, the spectral evolution of an intense gamma-ray line flare, nonthermal radio emission from coronal x-ray structures, and the formation of the helium-3 spectrum in impulsive solar flares. No subject index. Annotation c. by Book News, Inc., Portland, Or.

Author : R.P. Lin,B.R. Dennis,Arnold O. Benz
Publisher : Springer Science & Business Media
Page : 466 pages
File Size : 44,8 Mb
Release : 2003-03-31
Category : Science
ISBN : 9781402011078

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The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) - Mission Description and Early Results by R.P. Lin,B.R. Dennis,Arnold O. Benz Pdf

The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) satellite was launched on 5 February 2002. Its objective is to study the energy release and particle acceleration in solar flares through observations of X-rays and gamma rays. Two novel technologies are combined to obtain both spectra and images over a broad energy range. For the spectroscopy, cooled hyperpure germanium detectors are used to cover the energy range from 3 keV to 17 MeV with unprecedented keV-class resolution. Since focusing optics are not possible for making images with such high energy photons, tungsten and molybdenum absorbing grids are used to modulate the X-rays and gamma-rays coming from the Sun as the spacecraft rotates. This allows the spatial Fourier components of the source to be determined so that images can be made in spectral ranges where astronomical images have never been produced before. These new instrumental techniques require equally innovative software to reconstruct X-ray and gamma-ray spectra and images from the observations. Ample solar activity, abundant observations, and an open data policy have attracted many researchers. Astronomers face in the RHESSI mission an exciting new scientific potential. It has unusually broad possibilities for improving our understanding of the enigmatic solar flare phenomenon that is becoming increasingly important as society depends more and more on space-based technologies. In this volume, the functioning of RHESSI is explained, the data analysis techniques including spectroscopy and image reconstruction are introduced, and the experiences of the first few months of operation are summarized. First scientific results are presented that provide the essential base for more extended studies using RHESSI data and complementary observations by instruments on other spacecraft and at ground-based solar observatories. Scientists and students will find here the latest discoveries in solar flare research, as well as inspiration for future work. The papers will serve as references for the many new discoveries to come from the continuing RHESSI observations.

Author : Markus Aschwanden
Publisher : Springer Science & Business Media
Page : 233 pages
File Size : 52,9 Mb
Release : 2013-03-09
Category : Science
ISBN : 9789401725415

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Particle Acceleration and Kinematics in Solar Flares by Markus Aschwanden Pdf

Over the last decade we entered a new exploration phase of solar flare physics, equipped with powerful spacecraft such as Yohkoh, SoHO, and TRACE that pro vide us detail-rich and high-resolution images of solar flares in soft X-rays, hard X -rays, and extreme-ultraviolet wavelengths. Moreover, the large-area and high sensitivity detectors on the Compton GRO spacecraft recorded an unprecedented number of high-energy photons from solar flares that surpasses all detected high energy sources taken together from the rest of the universe, for which CGRO was mainly designed to explore. However, morphological descriptions of these beau tiful pictures and statistical catalogs of these huge archives of solar data would not convey us much understanding of the underlying physics, if we would not set out to quantify physical parameters from these data and would not subject these measurements to theoretical models. Historically, there has always been an unsatisfactory gap between traditional astronomy that dutifully describes the mor phology of observations, and the newer approach of astrophysics, which starts with physical concepts from first principles and analyzes astronomical data with the goal to confirm or disprove theoretical models. In this review we attempt to bridge this yawning gap and aim to present the recent developments in solar flare high-energy physics from a physical point of view, structuring the observations and analysis results according to physical processes, such as particle acceleration, propagation, energy loss, kinematics, and radiation signatures.

Author : A. Gordon Emslie,Brian R. Dennis,Robert P. Lin,Hugh Hudson
Publisher : Springer
Page : 478 pages
File Size : 45,7 Mb
Release : 2014-02-23
Category : Science
ISBN : 1489986685

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High-Energy Aspects of Solar Flares by A. Gordon Emslie,Brian R. Dennis,Robert P. Lin,Hugh Hudson Pdf

This edited volume describes many aspects of current research on solar flares, emphasizing recent progress in understanding their X-ray and gamma-ray emissions. Several of the chapters deal comprehensively with the problems of particle acceleration, conversion of particle energy into various forms of radiation, and the inference of physical processes from observations. Other chapters deal with the full breadth and richness of flare observations, including microflares and nanoflares. This volume is aimed at graduate students and researchers in solar physics and space science. Previously published in Space Science Reviews journal, Vol. 159/1-4, 2011.

Author : National Aeronautics and Space Adm Nasa
Publisher : Unknown
Page : 72 pages
File Size : 47,9 Mb
Release : 2018-11-12
Category : Electronic
ISBN : 1731158807

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The High Energy Solar Physics Mission (Hesp) by National Aeronautics and Space Adm Nasa Pdf

The High Energy Solar Physics mission offers the opportunity for major breakthroughs in the understanding of the fundamental energy release and particle acceleration processes at the core of the solar flare problem. The following subject areas are covered: the scientific objectives of HESP; what we can expect from the HESP observations; the high energy imaging spectrometer (HEISPEC); the HESP spacecraft; and budget and schedule. Crannell, Carol and Dennis, Brian and Davis, John and Emslie, Gordon and Haerendel, Gerhard and Hudson, High and Hurford, Gordon and Lin, Robert and Ling, James and Pick, Monique Goddard Space Flight Center; Marshall Space Flight Center...

Author : R. Ramaty,Natalie Mandzhavidze
Publisher : Unknown
Page : 524 pages
File Size : 54,9 Mb
Release : 2000
Category : Science
ISBN : UOM:39015049653135

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High Energy Solar Physics by R. Ramaty,Natalie Mandzhavidze Pdf

Contains articles based on talks presented at an October 1999 workshop, discussing developments in the study of solar flares. Emphasis is on work carried out at high energies and on new data anticipated from the High Energy Solar Spectroscopic Imager (HESSI). Themes are HESSI and related solar physics, energetic particles and theories of particle acceleration, X-rays, radio emission, and Gamma rays. Specific topics include stochastic particle acceleration in solar flares, flare loop geometry, understanding energetic flare particles without numerical codes, radio view of particle acceleration and complementarity with HESSI, and the chromospheric response to particle beams during a gamma-ray flare. Annotation copyrighted by Book News, Inc., Portland, OR

Author : R.P. Lin,B.R. Dennis,Arnold O. Benz
Publisher : Springer
Page : 456 pages
File Size : 43,6 Mb
Release : 2013-12-21
Category : Science
ISBN : 9789401734523

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The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) - Mission Description and Early Results by R.P. Lin,B.R. Dennis,Arnold O. Benz Pdf

The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) satellite was launched on 5 February 2002. Its objective is to study the energy release and particle acceleration in solar flares through observations of X-rays and gamma rays. Two novel technologies are combined to obtain both spectra and images over a broad energy range. For the spectroscopy, cooled hyperpure germanium detectors are used to cover the energy range from 3 keV to 17 MeV with unprecedented keV-class resolution. Since focusing optics are not possible for making images with such high energy photons, tungsten and molybdenum absorbing grids are used to modulate the X-rays and gamma-rays coming from the Sun as the spacecraft rotates. This allows the spatial Fourier components of the source to be determined so that images can be made in spectral ranges where astronomical images have never been produced before. These new instrumental techniques require equally innovative software to reconstruct X-ray and gamma-ray spectra and images from the observations. Ample solar activity, abundant observations, and an open data policy have attracted many researchers. Astronomers face in the RHESSI mission an exciting new scientific potential. It has unusually broad possibilities for improving our understanding of the enigmatic solar flare phenomenon that is becoming increasingly important as society depends more and more on space-based technologies. In this volume, the functioning of RHESSI is explained, the data analysis techniques including spectroscopy and image reconstruction are introduced, and the experiences of the first few months of operation are summarized. First scientific results are presented that provide the essential base for more extended studies using RHESSI data and complementary observations by instruments on other spacecraft and at ground-based solar observatories. Scientists and students will find here the latest discoveries in solar flare research, as well as inspiration for future work. The papers will serve as references for the many new discoveries to come from the continuing RHESSI observations.

Author : Donald V. Reames
Publisher : Springer
Page : 127 pages
File Size : 44,9 Mb
Release : 2017-03-10
Category : Science
ISBN : 9783319508719

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Solar Energetic Particles by Donald V. Reames Pdf

This concise primer introduces the non-specialist reader to the physics of solar energetic particles (SEP) and systematically reviews the evidence for the two main mechanisms which lead to the so-called impulsive and gradual SEP events. More specifically, the timing of the onsets, the longitude distributions, the high-energy spectral shapes, the correlations with other solar phenomena (e.g. coronal mass ejections), as well as the all-important elemental and isotopic abundances of SEPs are investigated. Impulsive SEP events are related to magnetic reconnection in solar flares and jets. The concept of shock acceleration by scattering on self-amplified Alfvén waves is introduced, as is the evidence of reacceleration of impulsive-SEP material in the seed population accessed by the shocks in gradual events. The text then develops processes of transport of ions out to an observer. Finally, a new technique to determine the source plasma temperature in both impulsive and gradual events is demonstrated. Last but not least the role of SEP events as a radiation hazard in space is mentioned and a short discussion of the nature of the main particle telescope designs that have contributed to most of the SEP measurements is given.

Author : National Research Council,Division on Engineering and Physical Sciences,Commission on Physical Sciences, Mathematics, and Applications,Committee on Solar Physics
Publisher : National Academies Press
Page : 73 pages
File Size : 42,6 Mb
Release : 1989-02-01
Category : Science
ISBN : 9780309040822

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The Field of Solar Physics by National Research Council,Division on Engineering and Physical Sciences,Commission on Physical Sciences, Mathematics, and Applications,Committee on Solar Physics Pdf

Exciting new observational and theoretical advances lead today's solar physicists to challenge many of the predictions of even recent models. This volume summarizes the major questions at the forefront of solar physics theory and observations, and proposes priority recommendations to explore these questions. The study also addresses serious institutional issues that have beset solar physics including the role of the universities in the national solar observations, structural barriers to careers in solar physics, and the leadership role of the federal funding agencies for ground-based solar research.

Author : Reuven Ramaty,Xin-Min Hua,Natalie Mandzhavidze
Publisher : Unknown
Page : 547 pages
File Size : 43,9 Mb
Release : 1996
Category : Solar flares
ISBN : OCLC:35056864

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High Energy Solar Physics by Reuven Ramaty,Xin-Min Hua,Natalie Mandzhavidze Pdf

Author : L.I. Miroshnichenko
Publisher : Springer Science & Business Media
Page : 489 pages
File Size : 42,6 Mb
Release : 2013-06-29
Category : Science
ISBN : 9789401596466

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Solar Cosmic Rays by L.I. Miroshnichenko Pdf

It turned out to be really a rare and happy occasion that we know exact1y when and how a new branch of space physics was born, namely, a physics of solar cosmic rays. It happened on February 28 and March 7, 1942 when the fIrst "cosmic ray bursts" were recorded on the Earth, and the Sun was unambiguously identifIed for the fIrst time as the source of high-velocity 10 particles with energies up to > 10 eV. Just due to such a high energy these relativistic particles have been called "solar cosmic rays" (SCR), in distinction from the "true" cosmic rays of galactic origin. Between 1942 and the beginning ofthe space era in 1957 only extremely high energy solar particle events could be occasionally recorded by cosmic ray ground-Ievel detectors and balloon borne sensors. Since then the detection techniques varied considerably and the study of SCR turned into essential part of solar and solar-terrestrial physics.

Author : Einar Tandberg-Hanssen,A. Gordon Emslie
Publisher : Cambridge University Press
Page : 290 pages
File Size : 41,5 Mb
Release : 1988-11-17
Category : Science
ISBN : 9780521308045

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The Physics of Solar Flares by Einar Tandberg-Hanssen,A. Gordon Emslie Pdf

The authors explore solar flares by applying physics and theoretical investigations.

Author : Lothar Oberauer,Aldo Ianni,Aldo Serenelli
Publisher : John Wiley & Sons
Page : 300 pages
File Size : 45,8 Mb
Release : 2020-02-10
Category : Science
ISBN : 9783527412761

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Solar Neutrino Physics by Lothar Oberauer,Aldo Ianni,Aldo Serenelli Pdf

A guide to the fascinating interplay between particle physics and astrophysics that highlights the discovery of neutrino oscillations Written by three international experts on the topic, Solar Neutrino Physics offers a review of the status of solar physics with its strong link to neutrino physics. The book explores constitutive physics and the governing equations of standard solar models. The authors also review the theory of neutrinos in the Standard Model and the related detector experiments. The book contains a summary of the results from various experiments and develops a coherent view of the current state-of-the-art of solar neutrino physics. Solar Neutrino Physics shows how solar models can be calibrated with the observational constraints of the age, mass, radius, and luminosity of the sun. The authors present general evolutionary properties of the sun as a star, past and future. They also discuss the solar neutrino production via the pp-chains and CNO-cycle, including the important role of the chemical composition of the sun. A very important source of information about the solar interior is offered by helioseismology, the study of solar oscillations. This important book: -Presents a high-level overview of the field of solar neutrino physics -Brings together data and their interpretation of results obtained at various solar neutrino observatories -Combines the theory of nuclear reactions with solar neutrino experiments -Contains a review of SNO+, JUNO, LENA, Hyper-Kamiokande, and DUNE. Written for astronomers, physicists, and high energy physicists, Solar Neutrino Physics contains a review of the field of neutrino physics, the relevant equations, and the impact of matter on the behavior of neutrino oscillations.

Author : B.V. Somov
Publisher : Springer Science & Business Media
Page : 255 pages
File Size : 40,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401123969

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Physical Processes in Solar Flares by B.V. Somov Pdf

Solar flares are very complex electromagnetic phenomena of a cataclysmic nature. Particles are accelerated to very high velocities and a variety of physical processes happen inside and outside flares. These processes can be studied by a large number of techniques from Earth and from space. The aim is to discover the physics behind solar flares. This goal is complicated because information about the flare mechanism can be obtained only in an indirect way by studying the secondary effects. This book provides three stages in the solution of the solar flare problem. Chapter one describes the connection between observational data and theoretical concepts, where it is stressed that next to investigating flares, the related non-stationary large-scale phenomena must be studied as well. The second chapter deals with secondary physical processes, in particular the study of high-temperature plasma dynamics during impulsive heating. The last chapter presents a model built on the knowledge of the two previous chapters and it constructs a theory of non-neutral turbulent current sheets. The author believes that this model will help to solve the problem of solar flares. For solar physicists, plasma physicists, high-energy particle physicists.

Author : M. S. Longair,Malcolm S. Longair
Publisher : Cambridge University Press
Page : 442 pages
File Size : 47,7 Mb
Release : 1992-02-27
Category : Science
ISBN : 0521387736

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High Energy Astrophysics: Volume 1, Particles, Photons and Their Detection by M. S. Longair,Malcolm S. Longair Pdf

Volume 1.