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X Ray And Gamma Ray Observations Of Solar Flares
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725622326 Total Pages :26 pages Book Rating :4.6/5 (223 download)
Book Synopsis Correlative Analysis of Hard and Soft X-Ray Emissions in Solar Flares by : National Aeronautics and Space Administration (NASA)
Download or read book Correlative Analysis of Hard and Soft X-Ray Emissions in Solar Flares written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes research performed under the Phase 3 Compton Gamma-Ray Observatory (CGRO) Guest Investigator Program. The objective of this work is to study different mechanisms of solar flare heating by comparing their predictions with simultaneous hard and soft X-ray observations. The datasets used in this work consist of hard X-ray observations from the CGRO Burst and Transient Source Experiment (BATSE) and soft X-ray observations from the Bragg Crystal Spectrometer (BCS) and Soft X-ray telescope (SXT) on the Japanese Yohkoh spacecraft. Zarro, Dominic M. Goddard Space Flight Center NASA-CR-204530, NAS 1.26:204530, R97-257 NASA Order S-57783-F...
Book Synopsis Hard X-Ray Imaging of Solar Flares by : Michele Piana
Download or read book Hard X-Ray Imaging of Solar Flares written by Michele Piana and published by Springer Nature. This book was released on 2022-01-01 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: The idea for this text emerged over several years as the authors participated in research projects related to analysis of data from NASA's RHESSI Small Explorer mission. The data produced over the operational lifetime of this mission inspired many investigations related to a specific science question: the when, where, and how of electron acceleration during solar flares in the stressed magnetic environment of the active Sun. A vital key to unlocking this science problem is the ability to produce high-quality images of hard X-rays produced by bremsstrahlung radiation from electrons accelerated during a solar flare. The only practical way to do this within the technological and budgetary limitations of the RHESSI era was to opt for indirect modalities in which imaging information is encoded as a set of two-dimensional spatial Fourier components. Radio astronomers had employed Fourier imaging for many years. However, differently than for radio astronomy, X-ray images produced by RHESSI had to be constructed from a very limited number of sparsely distributed and very noisy Fourier components. Further, Fourier imaging is hardly intuitive, and extensive validation of the methods was necessary to ensure that they produced images with sufficient accuracy and fidelity for scientific applications. This book summarizes the results of this development of imaging techniques specifically designed for this form of data. It covers a set of published works that span over two decades, during which various imaging methods were introduced, validated, and applied to observations. Also considering that a new Fourier-based telescope, STIX, is now entering its nominal phase on-board the ESA Solar Orbiter, it became more and more apparent to the authors that it would be a good idea to put together a compendium of these imaging methods and their applications. Hence the book you are now reading.
Book Synopsis High Energy Phenomena on the Sun by : R. Ramaty
Download or read book High Energy Phenomena on the Sun written by R. Ramaty and published by . This book was released on 1973 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of a symposium of high energy phenomena on the sun are presented. The subjects discussed include the following: (1) flare theories and optical observations, (2) microwave and hard X-ray observations, (3) ultraviolet and soft X-ray emissions, (4) nuclear reactions in solar flares, (5) energetic particles from the sun, (6) magnetic fields and particle storage, and (7) radio emissions in the corona and interplanetary space.
Book Synopsis Solar Gamma-, X-, and EUV Radiation by : S.R. Kane
Download or read book Solar Gamma-, X-, and EUV Radiation written by S.R. Kane and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of IAU Symposium No. 68 held in Buenos Aires, Argentina, 11-14 June 1974, organized by the IAU in co-operation with COSPAR
Book Synopsis High-Energy Aspects of Solar Flares by : A. Gordon Emslie
Download or read book High-Energy Aspects of Solar Flares written by A. Gordon Emslie and published by Springer. This book was released on 2011-08-24 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis ATS Observations of Sudden Increases of Total Electron Content Induced by EUV and X-ray Burst of Solar Flares by : Richard Frank Donnelly
Download or read book ATS Observations of Sudden Increases of Total Electron Content Induced by EUV and X-ray Burst of Solar Flares written by Richard Frank Donnelly and published by . This book was released on 1975 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: ATS-satellite observations of sudden increases in total electron content (SITECs) produced by extreme-ultraviolet (EUV) and X-ray bursts of solar flares are presented quantitatively and interpreted qualitatively. Large SITECs for the white-light flare of July 4, 1974, and for the large flares on July 5, September 10, and September 19, 1974, are illustrated. The time rate of change of total electron content dN (subscript)T/dt was directly compared with SFD (Sudden Frequency Deviations) measurements. The ATS-6 dN(subscript)T/dt measurements are essentially transionospheric SFD measurements. The main difference with respect to ground-based SFD measurements is that, in addition to the 100 to 200 km altitude range where ionospheric electron loss rates are high, the ATS-6 measurements also observe the low loss-rate F2 region. Because of this low ionization loss rate, dN(subscript)T/dt includes more of the slow radiation effects and proceeds to a negative decay phase much later than the ground-based SFDs.
Book Synopsis X-ray and Gamma-ray Observations of Solar Flares by : Paul Thomas Feffer
Download or read book X-ray and Gamma-ray Observations of Solar Flares written by Paul Thomas Feffer and published by . This book was released on 1996 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulations of X-rays and Gamma-rays from Solar Flares by : James Michael McTiernan
Download or read book Numerical Simulations of X-rays and Gamma-rays from Solar Flares written by James Michael McTiernan and published by . This book was released on 1989 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Hard X-Rays and Gamma-Rays from Solar Flares by : National Aeronautics and Space Adm Nasa
Download or read book The Hard X-Rays and Gamma-Rays from Solar Flares written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-10-12 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiation of energies from 10 KeV to greater than 10 MeV has been observed during solar flares, and is interpreted to be due to bremsstrahlung by relativistic electrons. A complete treatment of this problem requires solution of the kinetic equation for relativistic electrons and inclusion of synchrotron energy losses. Using the electron distributions obtained from numerical solutions of this equation the bremsstrahlung spectra in the impulsive x ray and gamma-ray regimes are calculated, and the variation of these spectral indices and directivities with energy and observation angle are described. The dependences of these characteristics of the radiation of changes in the solar atmospheric model, including the convergence of the magnetic field, the injected electron spectral index, and most importantly, in the anisotropy of the injected electrons and of the convergence of the magnetic field are also described. The model results are compared with stereoscopic observations of individual flares and the constraints that this data sets on the models are discussed. Mctiernan, James M. and Petrosian, Vahe Unspecified Center NSF ATM-83-20439; NSG-7092...
Download or read book MAX '91 written by and published by . This book was released on 1988 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Observations on Solar Flares by : John T. Jefferies
Download or read book Observations on Solar Flares written by John T. Jefferies and published by . This book was released on 1965 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various aspects of solar flares such as dynamic phenomena, the relation to magnetic fields, electromagnetic radiations, particle emissions, and flare loops are discussed with attempts at classification in terms of observable effects. Discrepancies in defining the mechanisms that must exist stress the need for further observations. (Author).
Book Synopsis Ionospheric Effects of Solar Flares by : Hermine Vloemans
Download or read book Ionospheric Effects of Solar Flares written by Hermine Vloemans and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudden Ionospheric Disturbances resulting from an interaction of the Solar Flare radiation with the constituents of the upper atmosphere constitute one of the three major aspects of ground level monitoring of solar flares -the other two being optical observations of flares, and the observations of solar bursts in radio wavelengths. SIDs, therefore, form a major part of flare monitoring programme in many observatories. Unlike the other two, however, the ionospheric effects of flares provide one major additional source of interest - the reaction of the ionospheric plasma to an impulsive ionization. The high atmosphere provides a low pressure laboratory without walls in which a host of reactions occur between electrons, ions and neutral particles. The resulting products and their distributions may bear no resemblance to those of the primary neutral constituents or their direct ionization products. The variations with the time of the day, with season and with solar activity that form the bulk of the ionospheric measurements are too slow to allow any insight into the nature of these ionospheric reactions whose lifetimes are often very short. The relaxation time of the ionospheric ionization is only a few minutes or fraction of a minute in the lower ionosphere and in the E-region and is about 30 min to an hour at 300 km. The flares provide a sudden short impulse comparable to these time scales.
Book Synopsis Non-Solar X- and Gamma-Ray Astronomy by : L. Gratton
Download or read book Non-Solar X- and Gamma-Ray Astronomy written by L. Gratton and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of IAU Symposium No. 87 held in Rome, Italy, May 8-10, 1969
Book Synopsis Solar Flare Physics by : National Aeronautics and Space Adm Nasa
Download or read book Solar Flare Physics written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-09-21 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Advances in the Understanding of Solar Flares by : S.R. Kane
Download or read book Recent Advances in the Understanding of Solar Flares written by S.R. Kane and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: These Proceedings result from the papers and discussions of the U.S.-Japan Seminar "Recent Advances in the Understanding of Solar Flares" held in Tokyo October 5-8, 1982. The meeting was sponsored jointly by the Japan Society for the Promotion of Science and the u.S. National Science Foundation. The principal aim of the meeting was to obtain the most up-to-date physical picture of solar flares by bringing together results from the recent observations by the Solar Maximum Mission (SMM) and HINOTORI satellites, together with other satellite data and ground-based data at both optical and radio wavelengths. These data cover the recent maximum of the solar activity cycle. The SMM and HINOTORI introduced a new dimension in flare observations by carrying out the first hard X-ray imaging observations, and the organizers especially felt that an intense discussion of the significance of these results in the context of flare theories would be important. Starting with an introductory presentation of the characteristics of the instruments on board the satellites, the sessions of the first day and the beginning of the second dealt mainly with energy transport in flares and with .the formation process of the hot plasma which is .
Book Synopsis Solar Flare Loops: Observations and Interpretations by : Guangli Huang
Download or read book Solar Flare Loops: Observations and Interpretations written by Guangli Huang and published by Springer. This book was released on 2018-01-31 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides results of analysis of typical solar events, statistical analysis, the diagnostics of energetic electrons and magnetic field, as well as the global behavior of solar flaring loops such as their contraction and expansion. It pays particular attention to analyzing solar flare loops with microwave, hard X-ray, optical and EUV emissions, as well as the theories of their radiation, and electron acceleration/transport. The results concerning influence of the pitch-angle anisotropy of non-thermal electrons on their microwave and hard X-ray emissions, new spectral behaviors in X-ray and microwave bands, and results related to the contraction of flaring loops, are widely discussed in the literature of solar physics. The book is useful for graduate students and researchers in solar and space physics.
Book Synopsis Great Microwave Bursts and Hard X Rays from Solar Flares by : Herbert J. Wiehl
Download or read book Great Microwave Bursts and Hard X Rays from Solar Flares written by Herbert J. Wiehl and published by . This book was released on 1983 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
