Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Arnon Dar"'
Publikováno v:
Universe, Vol 8, Iss 7, p 350 (2022)
It has been observationally established that supernovae (SNe) of Type Ic produce long duration gamma-ray bursts (GRBs) and that neutron star mergers generate short hard GRBs. SN-Less GRBs presumably originate in a phase transition of a neutron star i
Externí odkaz:
https://doaj.org/article/72fff5d582054384aa1e25556a464a8b
Autor:
Shlomo Dado, Arnon Dar
Publikováno v:
Advances in Astronomy, Vol 2015 (2015)
The near infrared (NIR) flare/rebrightening in the afterglow of the short hard gamma ray burst (SHB) 130603B measured with the Hubble Space Telescope (HST) and an alleged late-time X-ray excess were interpreted as possible evidence of a neutron star
Externí odkaz:
https://doaj.org/article/a2ac49f840a048c8b9a992acdfc4279d
Autor:
Shlomo Dado, Arnon Dar
Publikováno v:
Physics & Astronomy International Journal. 7:1-5
Phase transitions within anomalous X-ray pulsars (AXPs) and soft γ-ray repeaters (SGRs) can lead to mini contractions. Such contractions produce pulsar gliches and shock break outs from their surface accompanied by thermal X/γ -ray emission. Highly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::933c6cc1812aa47dcc56803ff6395772
https://doi.org/10.15406/paij.2023.07.00276
https://doi.org/10.15406/paij.2023.07.00276
Autor:
Shlomo Dado, Arnon Dar
The canonball model, which unifies cosmic ray bursts (CRBs) and gamma ray bursts (GRBs), is used to predict the maximum isotropic equivalent gamma ray energy release in a GRB. The predicted maximum is based on the observed knee around 1 TeV in the en
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea97ac08611c55812b6f784df3ff1590
Autor:
Shlomo Dado, Arnon Dar
Publikováno v:
The Astrophysical Journal Letters. 911:L10
The peak frequencies of the two broad humps evident in the spectral energy density of blazars (SED) are time dependent and vary a lot between different blazars. However, their ratio in most blazars, appears to be almost universal and equal to $m_e c^
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::483bb0b7dd2699e0fbae30767d77b623
https://doi.org/10.3847/2041-8213/abeaa5
https://doi.org/10.3847/2041-8213/abeaa5
Autor:
Arnon Dar, Shlomo Dado
Publikováno v:
Journal of High Energy Astrophysics. :9-15
We show that the observed fluxes, spectra and sky distributions of the high energy astronomical neutrinos, gamma rays and cosmic ray positrons satisfy the simple relations expected from their common production in hadronic collisions in/near source of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b30617d3efbdfa0a210ff4ac33c41c78
https://doi.org/10.1016/j.jheap.2015.12.001
https://doi.org/10.1016/j.jheap.2015.12.001
Autor:
Shlomo Dado, Arnon Dar
The observed light curves and other properties of the two extragalactic fast x-ray transients, CDF-S XT1 and CDF-S XT2, which were discovered recently in archival data of the Chandra Deep Field-South (CDF-S) observations, indicate that they belong to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f38a53c9c915cc996adc92e497fcba38
Autor:
Arnon Dar, Shlomo Dado
The observed lightcurves and estimated sky rate of fast extragalactic x-ray transients (XRTs) discovered in archival Chandra data indicate that they belong to two distinct XRT populations. The first population of relatively short duration pulses, whi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd9b11212b533bf6dcdbbe711b77f470
Autor:
Arnon Dar, Shlomo Dado
The well-sampled afterglows of gamma ray bursts (GRBs) not associated with a supernova (SN) explosion, can be scaled down to a simple dimensionless universal formula, which describes well their temporal behavior. Such SN-less GRBs include short hard
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5899b5815c58e792de1b53ea6c06777
Autor:
Shlomo Dado, Arnon Dar
The fraction of long duration gamma ray bursts (GRBs) without an associated bright supernovae (SNe) at small redshifts $(z4)$, however, favors phase transition of neutron stars to quark stars in high mass X-ray binaries (HMXBs), rather than merger of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e028f0449b4859503454028ec61f34e1
http://arxiv.org/abs/1710.02456
http://arxiv.org/abs/1710.02456