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3 edition of Gamma-ray transfer and energy deposition in supernovae found in the catalog.

Gamma-ray transfer and energy deposition in supernovae

Gamma-ray transfer and energy deposition in supernovae

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  • 17 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Computational astrophysics.,
  • Energy transfer.,
  • Gamma rays.,
  • Monte Carlo method.,
  • Nuclear reactions.,
  • Radiative transfer.,
  • Radioactive decay.,
  • Stellar mass ejection.,
  • Stellar models.,
  • Supernova remnants.,
  • Supernovae.

  • Edition Notes

    Other titlesGamma ray transfer and energy deposition in supernovae
    StatementDouglas A. Swartz, Peter G. Sutherland, and Robert P. Harkness.
    SeriesNASA-TM -- 111182, NASA technical memorandum -- 111182..
    ContributionsSutherland, Peter Gordon, 1946-., Harkness, Robert P., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17117519M

    and electronic models of gamma ray emitters such as supernovae remnants, gamma ray bursts, or active galactic nuclei. Expected Sources of Astronomical High Energy. Early Estimates of Earth's Age If you look at the long march of human understanding, science begins with the idea that we can understand our role in the universe using logic and observation. For example, the stars and planets were mysterious objects for most of human history.

    Proc. SPIE , Space Telescopes and Instrumentation Ultraviolet to Gamma Ray, (5 October ); doi: / Read Abstract + Lynx is an X-ray mission concept with superb imaging capabilities . For a sample with density of atoms or ions of the order of 10ee19 cm-3, the density of excited nucleus can be as much as 10ee5 cm-3, and all nuclei that are coherently oscillating in phase produce a cooperative burst of gamma-ray radiation times shorter than the relaxation time, ns for 57Fe.

    supernovae. Combining Very Large Tele-scope (VLT) and HST spectra with time-dependent non-local thermodynamic equilibrium (LTE) radiative transfer calcu-lations, it was determined that 44Ti had taken the role of key energy supplier to the supernova eight years after the explo-sion (Jerkstrand et al., ). It was consequently exciting to see both. Even though the combined laboratory, astrophysical and cosmological evidence implies that neutrinos have masses, neutrinos provide only a small cosmic dark matter component. The study of solar neutrinos provides important information on nuclear processes inside the Sun as well as on matter densities. Moreover, supernova neutrinos provide sensitive probes for studying Cited by: 1.


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Gamma-ray transfer and energy deposition in supernovae Download PDF EPUB FB2

Get this from a library. Gamma-ray transfer and energy deposition in supernovae. [Douglas A Swartz; Peter Gordon Sutherland; Robert P Harkness; United States.

National Aeronautics and Space Administration.]. Gamma-rays from Type Ia supernova SNJ. Solving the gamma-ray radiative transfer equation for supernovae The energy deposition is calculated from the.

The energy deposition of all mechanisms decreases with time, including the rate of K-shell ionizations of all elements throughout the supernovae model evaluated herein. Swartz DA, Sutherland PG, Harkness RP () Gamma ray transfer and energy deposition in supernovae. ApJ ADS CrossRef Google Scholar Truran JW, Arnett WD, Cameron AGW () Nucleosynthesis in supernova shock waves.

The physical processes at work in the supernova ejecta, including gamma-ray deposition, non-thermal electron degradation, ionization and excitation, and radiative transfer are described and linked to the computation and application of advanced spectral models.

Some of the results derived so far from nebular-phase supernova analysis are by: The energy release in the nuclear decays 56 Ni → 56 Co → 56 Fe, with respective lifetimes of and days, represents a few percent of the initial energy release.

This model allows to understand the homogeneity of the observed type Ia supernovae explosions and why they have been used successfully as standard candles in cosmology (see. Swartz DA, Sutherland PG, Harkness RP () Gamma-ray transfer and energy deposition in supernovae. ApJ doi: / ADS CrossRef Google Scholar Weaver TA, Woosley SE () Evolution and explosion of massive stars.

@article{osti_, title = {Radiation Transport in Type IA Supernovae}, author = {Eastman, R}, abstractNote = {It has been said more than once that the critical link between explosion models and observations is the ability to accurately simulate cooling and radiation transport in the expanding ejecta of Type Ia supernovae.

It is perhaps frustrating to some of the theorists who. @article{osti_, title = {An argument for weakly magnetized, slowly rotating progenitors of long gamma-ray bursts}, author = {Moreno Méndez, Enrique, E-mail: [email protected]}, abstractNote = {Using binary evolution with Case-C mass transfer, the spins of several black holes (BHs) in X-ray binaries (XBs) have been predicted and.

Effects of Stellar Medium Density Inhomogeneities and Cosmic Rays on X-ray and Gamma-ray Radiation from Supernova Envelopes Petukhov, Yu.V.; Razin, A.V.; Razin, V.A.

A representative nucleosynthesis calculation for such a type Ia supernova event is shown in Figure particularly the region of mass fraction between ∼ M ⊙ and M ⊙, which is dominated by the presence of 56 Ni, is in nuclear statistical equilibrium.

It is this nickel mass that is responsible—as a consequence of the decay of 56 Ni through 56 Co to 56 Fe—for the bulk.

Cosmic Explosions in Three Dimensions: Asymmetries in Supernovae and Gamma-Ray Bursts ()(en)(3 Peter Höflich, Pawan Kumar, J. Craig Wheeler Highlights routine supernova polarimetry and new insights into core collapse and thermonuclear explosions.

When supernovae enter the nebular phase after a few months, they reveal spectral fingerprints of their deep interiors, glowing by radioactivity produced in the explosion.

The physical processes at work in the supernova ejecta, including gamma-ray deposition, non-thermal electron degradation, ionization and excitation, and radiative transfer Author: A.

Jerkstrand. FIGURE Crab Nebula in the optical. The Crab Nebula, a supernova remnant whose parent supernova was recorded by Chinese astronomers in the summer of A.D.is a beautiful example of a relatively young remnant, whose appearance is thought to be largely driven by particle acceleration processes tied to the Crab Pulsar; the observed radiation is due to.

% Title: Analysis of the type IA supernova SN D. % The M series of delayed-detonation models were newly introduced in this paper. % On p.Peter says m36 is the best of the lot for 94D.

% Note on p. 98, Fig. 10, that density and gamma-ray energy-deposition have their % line types interchanged. Note that the excess was detected only at one epoch in one filter. Therefore, other interpretations are also possible, for example, emission by the external shock [] or by a central magnetar [, ], or thermal emission from newly formed dust [].Importantly, a late-time excess is also visible in X-ray [], and thus, the near-IR and X-ray excesses might be caused by the same mechanism Cited by: Beta particles are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei such as potassiumThe beta particles emitted are a form of ionizing radiation also known as beta rays.

The production of beta particles is termed beta are designated by the Greek letter beta (β). At right is a graph or block diagram that shows the. Unfortunately, this book can't be printed from the OpenBook.

If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF. Gamma-Ray Burst: Problems Delineated by HETE-2 and Other Observations (N Kawai) The Non-Thermal High Energy Emission from GRBs — Theoretical Prediction (E Nakar) Recent Results from CANGAROO (M Mori) Observations of Galactic Gamma-Ray Sources with H.E.S.S.

(D Berge). Science is a very vast subject that has innumerable words, terms, definitions, etc. The following article has a glossary list that will help you understand these difficult scientific terms and definitions at a read on the following glossary to get a quick idea about some interesting terms.

KEYWORDS: Observatories, Telescopes, Astronomy, Pulsars, Polarization, Sensors, Polarimetry, Space telescopes, Gamma radiation, Gamma-ray astronomy Read Abstract + e-ASTROGAM is a concept for a breakthrough observatory space mission carrying a γ-ray telescope dedicated to the study of the non-thermal Universe in the photon energy range .Supernovae play a central role in modern astrophysics.

They are of prime importance for the chemical evolution of the Universe, and they are one of the most important sources of energy for the interstellar medium (ISM). Part of that energy is in the form of cosmic rays, which have an energy density in the Galaxy of eV cm−3, thus con-File Size: 4MB.Recent astrophysical observations in X-ray, gamma-ray, neutrino, and high energy cosmic ray experiments, in conjunction with theoretical studies, have revealed various new aspects of the high energy universe, including promising candidates for cosmic ray acceleration sites.