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Results 1 - 10
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506
TEV OBSERVATIONS OF SNRS AND UNIDENTIFIED SOURCES
, 2001
"... A review of very high energy γ-ray astronomy is presented. Particular attention is paid to the atmospheric Cherenkov imaging technique whose employment has resulted in detections of both galactic and extra-galactic objects at energies above 300GeV. Next generation ground-based telescopes promise to ..."
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A review of very high energy γ-ray astronomy is presented. Particular attention is paid to the atmospheric Cherenkov imaging technique whose employment has resulted in detections of both galactic and extra-galactic objects at energies above 300GeV. Next generation ground-based telescopes promise
Abstract Shocks and particle acceleration in SNRs: theoretical aspects
, 2003
"... Energetic particles are an essential component in supernova remnants (SNRs). Non-thermal particle acceleration in supernova shocks is expected to be an efficient process at different evolutional stages of SNRs. Non-linear wave–particle interactions being the governing process of the SNR collisionles ..."
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Cited by 4 (0 self)
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Energetic particles are an essential component in supernova remnants (SNRs). Non-thermal particle acceleration in supernova shocks is expected to be an efficient process at different evolutional stages of SNRs. Non-linear wave–particle interactions being the governing process of the SNR
Observation of selected SNRs with the MAGIC Cherenkov Telescope
, 907
"... Abstract. Supernova Remnants (SNRs) are believed to be the acceleration sites of galactic cosmic rays. As such they are expected to produce Very High Energy (VHE) gamma-rays through hadronic and/or electromagnetic scenarios, hence they are natural targets for observations with ground-based Imaging A ..."
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Abstract. Supernova Remnants (SNRs) are believed to be the acceleration sites of galactic cosmic rays. As such they are expected to produce Very High Energy (VHE) gamma-rays through hadronic and/or electromagnetic scenarios, hence they are natural targets for observations with ground-based Imaging
Prospects for SNIa Explosion Mechanism Identification Through SNRs
, 2002
"... Abstract. We present the first results from an ongoing work aimed to use supernovae remnants to discriminate among different type Ia supernovae explosion models. We have computed the hydrodynamic interaction of supernova ejecta with the interstellar medium, obtaining the evolution of the density, te ..."
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Cited by 1 (0 self)
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of high quality, high resolution, data about supernova remnants (SNRs). Whereas the atomic codes that allow to compute and fit the X-ray spectra have experienced a considerable improvement in the
Primary Versus Secondary Leptons in the EGRET SNR’s
, 2004
"... The EGRET supernova remnants (SNR’s) are all expanding into nearby dense molecular clouds, powering a shock at the interface where protons and electrons accelerate to relativistic energies. A viable mechanism for the emission of γ-rays in these sources is the decay of neutral pions created in collis ..."
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The EGRET supernova remnants (SNR’s) are all expanding into nearby dense molecular clouds, powering a shock at the interface where protons and electrons accelerate to relativistic energies. A viable mechanism for the emission of γ-rays in these sources is the decay of neutral pions created
Rate-Optimal MIMO Transmission with Mean and Covariance Feedback at Low SNRs
"... Abstract-This paper considers a multiple-input-multiple-output (MIMO) wireless communication scenario in which the channel follows a block-fading model with a general spatially correlated complex Gaussian distribution with nonzero mean. We derive an explicit characterization of the (ergodic) rate-o ..."
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that these improvements can be extended to moderate-to-high SNRs by signaling along the low-SNR optimal eigenbasis with optimized power allocation. Index Terms-Correlated channel with nonzero mean, ergodic capacity, low signal-to-noise ratio (SNR) signaling, multiple-input-multiple-output (MIMO) systems, noncentral
A Kinship between the EGRET SNR’s and Sgr A East
, 2003
"... Sgr A East appears to be a single, mixed-morphology 10,000-year-old supernova remnant (SNR) at the Galactic center. It also appears to belong to a class of remnants that have been observed and detected at 1720 MHz, the transition frequency of OH maser emission. However, if the EGRET source 3EG J1746 ..."
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1746-2852 coincident with the Galactic center is itself associated with this object, it would endow it with a γ-ray luminosity almost two orders of magnitude greater than that of the other EGRET-detected SNR’s. We here reconsider the viability of a pion-production mechanism as the source
The X-ray Study of Small-Scale Shock Structures in the Non-thermal SNRs
"... Abstract The shock front of SNRs is the most probable acceleration site of high energy particles (up to, or more than TeV) as already confirmed by the hard X-ray observations of the synchrotron emission from accelerated electrons. The remarkable spatial resolution of the X-ray observatory Chandra e ..."
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Abstract The shock front of SNRs is the most probable acceleration site of high energy particles (up to, or more than TeV) as already confirmed by the hard X-ray observations of the synchrotron emission from accelerated electrons. The remarkable spatial resolution of the X-ray observatory Chandra
This is the astro-ph version Ionization States and Plasma Structures of Mixed-morphology SNRs Observed with ASCA
, 2005
"... We present the results of a systematic study using ASCA of the ionization state for six “mixed-morphology ” supernova remnants (MM SNRs): IC 443, W49B, W28, W44, 3C391, and Kes 27. MM SNRs show centrally filled thermal X-ray emission, which contrasts to shell-like radio morphology, a set of characte ..."
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of characteristics at odds with the standard model of SNR evolution (e.g., the Sedov model). We have therefore studied the evolution of the MM SNRs from the ionization conditions inferred from the X-ray spectra, independent of X-ray morphology. We find highly ionized plasmas approaching ionization equilibrium in all
P oS(MRU)045 Radio properties of young SNe/SNRs in Arp220
"... Radio observations of young radio supernovae (SNe) and supernova remnants (SNRs) can pro-vide a unique window on the stellar/ISM properties of starburst galaxies. Such observations can potentially constrain issues of cosmological importance such as whether stellar IMFs are rad-ically different in ex ..."
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Radio observations of young radio supernovae (SNe) and supernova remnants (SNRs) can pro-vide a unique window on the stellar/ISM properties of starburst galaxies. Such observations can potentially constrain issues of cosmological importance such as whether stellar IMFs are rad-ically different
Results 1 - 10
of
506
