High Energy Aspects of Solar Flares

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.

High Energy Aspects of Solar Flares

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.

High Energy Phenomena on the Sun

SOLAR FLARE OBSERVATIONS AND SOLAR FLARE MODELS Charles L .
Hyder Goddard Space Flight Center ... I will show here how this process
relegates the infall - impact model for flares to a secondary role in high energy
solar events .

High Energy Phenomena on the Sun

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.

High Energy Phenomena on the Sun

SOLAR FLARE OBSERVATIONS AND SOLAR FLARE MODELS Charles L.
Hyder Goddard Space Flight Center ... I will show here how this process
relegates the infall - impact model for flares to a secondary role in high energy
solar events .

High Energy Phenomena on the Sun


High Energy Phenomena on the Sun Symposium Proceedings September 28 30 1972

SOLAR FLARE OBSERVATIONS AND SOLAR FLARE MODELS Charles L .
Hyder Goddard Space Flight Center ... I will show here how this process
relegates the infall - impact model for flares to a secondary role in high energy
solar events .

High Energy Phenomena on the Sun Symposium Proceedings  September 28 30  1972


Scientific and Technical Aerospace Reports

The strictly thermal infall - impact model cannot lead to temperatures greater than
five million degrees K. Another process is needed to explain the high energy
aspects of solar flares which are related to temperatures equal to or greater than
10 ...

Scientific and Technical Aerospace Reports


Meteorological and Geoastrophysical Abstracts

Subject Headings : Solar wind perturbations ; Solar wind - interplanetary
magnetic field relationships . ... knowledge of these effects to advance , a new
space mission dedicated to studying the high - energy aspects of solar flares at
high spatial ...

Meteorological and Geoastrophysical Abstracts

Covering the world's literature on meteorology, climatology, atmospheric chemistry and physics, physical oceanography, hydrology, glaciology, and related environmental sciences.

Nuclear Science Abstracts

The strictly thermal infall-impact model cannot lead to temperatures greater than
5 x 106 K. At least one more process is needed to explain the high energy
aspects of solar flares; that is, temperatures equal to or greater than 107 K,
nonthermal ...

Nuclear Science Abstracts


Innovative Telescopes and Instrumentation for Solar Astrophysics

High - Speed Ha Camera and the Real - Time Image Processing System for
Solar Observations Yoichiro Hanaoka , Motokazu ... Therefore , to resolve
individual spikes is essentially important to study the high - energy aspects of
solar flares .

Innovative Telescopes and Instrumentation for Solar Astrophysics


NASA SP

SOLAR FLARE OBSERVATIONS AND SOLAR FLARE MODELS Charles L.
Hyder Goddard Space Flight Center ... I will show here how this process
relegates the infall - impact model for flares to a secondary role in high energy
solar events .

NASA SP


Proceedings of Kofu Symposium

HIGH - ENERGY SOLAR FLARE OBSERVATIONS BY YOHKOH : A REVIEW T .
Kosugi National Astronomical ... impulsive source ” , “ super - hot thermal source ”
, and so on , each of which may represent a different aspect of flare energetics .

Proceedings of Kofu Symposium


The Reuven Ramaty High Energy Solar Spectroscopic Imager RHESSI Mission Description and Early Results

RHESSI ASPECT RECONSTRUCTION M. FIVIAN, R. HEMMECK, A.
MCHEDLISHVILI and A. ZEHNDER Paul Scherrer Institute, ... The Reuven
Ramaty High-Energy Solar Spectroscopic Imager RHESSI spacecraft spins at
about 15 rpm around an axis close to Sun center. ... The primary scientific aim of
the mission is to investigate the physics of particle acceleration and energy
release in solar flares.

The Reuven Ramaty High Energy Solar Spectroscopic Imager  RHESSI    Mission Description and Early Results

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.

Solar Interior and Atmosphere

I. FLARE STRUCTURE AND PREDICTION Solar flares are abrupt releases of
magnetic energy that produce a panoply of high - energy effects , particles and
photons . They almost invariably oc[ 964 ] cur at sharp inversions of sign of the ...

Solar Interior and Atmosphere

Observational data derived from the world's largest solar telescopes are correlated with theoretical discussions in nuclear and atomic physics by contributors representing a wide range of interests in solar research.

Astronomy and Astrophysics for the 1980 s Reports of the panels

expected neutron emissions may also have been detected following a giant limb
flare in 1980 . These results opened ... particles and gamma rays by the SMM will
greatly clarify our understanding of the high - energy aspects of solar flares . 3 .

Astronomy and Astrophysics for the 1980 s  Reports of the panels


Assessment of Programs in Solar and Space Physics 1991

the solar bolometric irradiance varies with the sunspot cycle and with the
appearance and dissolution of individual ... High - energy aspects of solar activity
have been studied at length because of the success of SMM and its repair
mission .

Assessment of Programs in Solar and Space Physics 1991


Origin of Cosmic Rays

INTRODUCTION High energy phenomena in the solar physics context, simply
means solar flares. To be sure, the energies attained during flares are certainly
not very impressive on a cosmic-ray scale. The most energetic particles belong
the ...

Origin of Cosmic Rays

Proceedings of IAU Symposium No. 94, jointly with International Union of Pure and Applied Physics, held in Bologna, Italy, 11-14 June 1980

Cosmic Rays 94

Solar, Heliospheric, Astrophysical and High-energy Aspects : Proceedings of the
14th European Cosmic Ray Symposium, ... of some high - energy solar flares for
which multiwavelength observations have revealed new properties of solar ilare
 ...

Cosmic Rays 94


Resident Research Associateships Postdoctoral and Senior Postdoctoral

They will fly on the Solar and Heliospheric Observatory Mission , scheduled for
launch in 1995 . High - Energy Aspects of Solar Flares BR Dennis LE Orwig 44 .
30 . 44 . 15 CJ Crannell GD Holman The acceleration of charged particles to high
 ...

Resident Research Associateships  Postdoctoral and Senior Postdoctoral


Opening Frontiers in Solar Research

INTRODUCTION The Solar - A mission , which will be launched by the Japanese
Institute for Space and Astronautical Science ( ISAS ) in August 1991 , carries a
range of instruments designed to study the high energy aspects of Solar Flares .

Opening Frontiers in Solar Research


Instrumentation in Astronomy

... The Advanced Solar Observatory , NASA Technical Publications , 1986 . " The
Pinhole / Occulter Executive Summary , " NASA Technical Paper 2089 , ( October
1982 ) . " On High - Energy Aspects of Solar Flares - A Basis for a High Energy ...

Instrumentation in Astronomy