The Antimatter's Very Few Dust Grains are Reasons of Pioneers Anomalous Acceleration, Moon's Blinking Lights and Terrestrial Gamma-Ray Flashes. Explanation Hypothesis

2016 ◽  
Author(s):  
Oleksandr Ziborov
Keyword(s):  
Gamma Ray ◽  
Dust Grains ◽  
Anomalous Acceleration

Cosmic Gamma-Ray Bursts from Relativistic Dust Grains

1974 ◽  
Vol 187 ◽  
pp. L93 ◽  
Author(s):  
Jonathan E. Grindlay ◽  
G. G. Fazio
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Dust Grains

scholarly journals Gamma-Ray Burst Afterglows: Time-varying Extinction, Polarization, and Colors due to Rotational Disruption of Dust Grains

2020 ◽  
Vol 895 (1) ◽  
pp. 16 ◽  
Author(s):  
Thiem Hoang ◽  
Nguyen Chau Giang ◽  
Le Ngoc Tram
Keyword(s):  
Gamma Ray ◽  
Time Varying ◽  
Dust Grains ◽  
Gamma Ray Burst

Cosmic gamma-ray burst from intergalactic relativistic dust grains

1979 ◽  
Vol 63 (2) ◽  
pp. 517-523 ◽  
Author(s):  
Ajoy Kumar Dasgupta
Keyword(s):  
Gamma Ray ◽  
Dust Grains ◽  
Gamma Ray Burst

scholarly journals Silicon and iron dust in gamma-ray burst host galaxy absorbers

2019 ◽  
Vol 490 (2) ◽  
pp. 2599-2605 ◽  
Author(s):  
T Zafar ◽  
K E Heintz ◽  
A Karakas ◽  
J Lattanzio ◽  
A Ahmad
Keyword(s):  
Interstellar Dust ◽  
Gamma Ray ◽  
High Redshift ◽  
Large Fraction ◽  
Vital Role ◽  
Extinction Curve ◽  
Host Galaxy ◽  
Dust Grains ◽  
Interstellar Dust Grains ◽  
Phase Column

ABSTRACT Depletion studies provide a way to understand the chemical composition of interstellar dust grains. We here examine 23 gamma-ray bursts (GRBs) optical afterglow spectra (spanning 0.6 ≤ z ≤ 5.0) and compare their silicon and iron dust-phase column densities with different extinction curve parameters to study the composition of the interstellar dust grains in these high-redshift GRB host galaxies. The majority of our sample (87 per cent) show featureless extinction curves and only vary in shape. We observe strong correlations (with $\gt 96{{\ \rm per\ cent}}$ significance) between the total-to-selective extinction, RV, and the dust-phase column densities of Si and Fe. Since a large fraction of interstellar iron is locked in silicate grains, this indicates that high Si and Fe depletion leads to an increase in the fraction of large silicate grains and vice versa. This suggests that silicates play a vital role to induce the entire extinction at any wavelength. On the other hand, the far-ultraviolet (UV) extinction is usually attributed to the presence of small silicates. However, we find no trend between the far-UV parameter of the extinction curve, c4, and the abundance of Si and Fe in the dust phase. We, therefore, propose that the far-UV extinction could be a combined effect of small (probably nanoparticles) dust grains from various species.

On the possible gamma-ray source in Cygnus

1967 ◽  
Vol 31 ◽  
pp. 469-471
Author(s):  
J. G. Duthie ◽  
M. P. Savedoff ◽  
R. Cobb
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Right Ascension

A source of gamma rays has been found at right ascension 20h15m, declination +35°, with an uncertainty of 6° in each coordinate. Its flux is (1·5 ± 0·8) x 10-4photons cm-2sec-1at 100 MeV. Possible identifications are reviewed, but no conclusion is reached. The mechanism producing the radiation is also uncertain.

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

Gamma-ray astronomy

AccessScience ◽  
2015 ◽  
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Astronomy

Compton Gamma-Ray Observatory (CGRO)

AccessScience ◽  
2015 ◽  
Keyword(s):  
Gamma Ray

Gamma-ray bursts

AccessScience ◽  
2015 ◽  
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Bursts

Gamma-ray bursts: Neutron afterglow

Nature China ◽  
2009 ◽  
Author(s):  
Tim Reid
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Bursts
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