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Statistics of the magnetic field disturbances in the supernova remnants (SNRs) can be accessed using the second-order correlation function of the synchrotron intensities. Here we measure the magnetic energy spectra in supernova remnant…

高能天体物理现象 · 物理学 2020-09-15 Pavan Kumar Vishwakarma , Jais Kumar

Over the past decade, $\gamma$-ray observations of supernova remnants (SNRs) and accurate cosmic-ray (CR) spectral measurements have significantly advanced our understanding of particle acceleration in SNRs. In combination with…

高能天体物理现象 · 物理学 2019-08-10 Xiao Zhang , Siming Liu

Our statistics on Galactic supernova remnants (SNRs) shows that the electrons temperature ($T$) of hard X-ray and the shock waves traveling velocity ($\upsilon$) decreases with ages ($t$) for all-sort remnants. However, the shock waves…

高能天体物理现象 · 物理学 2009-10-18 Jian-Wen Xu , Ya-Peng Hu

Supernova distance and primary CMB anisotropy measurements provide powerful probes of the dark energy evolution in a flat universe but degrade substantially once curvature is marginalized. We show that lensed CMB polarization power spectrum…

天体物理学 · 物理学 2009-11-11 Wayne Hu , Dragan Huterer , Kendrick M. Smith

The observed spectrum of a supernova remnant (SNR) is a superposition of many ``local'' spectra emitted by regions of SNRs that are under different physical conditions. The question remains as to whether the broadening of the high-energy…

天体物理学 · 物理学 2007-05-23 O. Petruk

A nonlinear kinetic model of cosmic ray (CR) acceleration in supernova remnants (SNRs) is used to describe the properties of Tycho's SNR. Observations of the expansion characteristics and of the nonthermal radio and X-ray emission spectra,…

天体物理学 · 物理学 2009-11-07 H. J. Voelk , E. G. Berezhko , L. T. Ksenofontov , G. P. Rowell

We report the detection of Galactic supernova remnants (SNRs) in the mid-infrared (at 24 and 70 {\mu}m), in the coordinate ranges 10 < l < 65 deg and 285 < l < 350 deg, |b| < 1 deg, using the Multiband Imaging Photometer (MIPS) aboard the…

星系天体物理 · 物理学 2015-05-27 D. Pinheiro Goncalves , A. Noriega-Crespo , R. Paladini , P. G. Martin , S. J. Carey

We present a high-resolution radio study of the supernova remnant (SNR) G11.2-0.3 using archival VLA data. Spectral tomography is performed to determine the properties of this composite-type SNR's individual components, which have only…

天体物理学 · 物理学 2009-11-07 Cindy Tam , Mallory S. E. Roberts , Victoria M. Kaspi

The maps of intensity and polarization of the radio synchrotron emission from shell-type supernova remnants (SNRs) contain a considerable amount of information, although of not easy interpretation. With the aim of deriving constraints on…

高能天体物理现象 · 物理学 2016-03-23 Rino Bandiera , Oleh Petruk

The thin layer approximation applied to the expansion of a supernova remnant assumes that all the swept mass resides in a thin shell. The law of motion in the thin layer approximation is therefore found using the conservation of momentum.…

高能天体物理现象 · 物理学 2020-05-01 Lorenzo Zaninetti

We study high-energy emission from the mergers of neutron star binaries as electromagnetic counterparts to gravitational waves aside from short gamma-ray bursts. The mergers entail significant mass ejection, which interacts with the…

高能天体物理现象 · 物理学 2015-04-23 Hajime Takami , Koutarou Kyutoku , Kunihito Ioka

The search for neutrinoless double beta decay ($0\nu\beta\beta$) is currently one of the key objectives in neutrino physics research. The decay rate of $0\nu\beta\beta$ decay depends on the effective Majorana neutrino mass $|\langle m…

高能物理 - 唯象学 · 物理学 2026-01-28 Prokash Pegu , Chandan Duarah

The launch of Chandra and XMM-Newton has led to important new findings concerning the X-ray emission from supernova remnants. These findings are a result of the high spatial resolution with which imaging spectroscopy is now possible, but…

天体物理学 · 物理学 2007-05-23 Jacco Vink

A nonlinear kinetic theory of cosmic ray (CR) acceleration in supernova remnants is employed to investigate the properties of the remnant SN 1987A. It is shown that a large downstream magnetic field ~10 mG is required to fit the existing…

天体物理学 · 物理学 2009-11-11 E. G. Berezhko , L. T. Ksenofontov

General relativistic calculations are made of neutrino-antineutrino annihilation into electron-positron pairs near the surface of a neutron star. It is found that the efficiency of this process is enhanced over the Newtonian values up to a…

天体物理学 · 物理学 2009-10-31 Jay D. Salmonson , James R. Wilson

Supernova Remnants (SNRs) shocks are believed to accelerate charged particles and to generate strong turbulence in the post-shock flow. From high-energy observations in the past decade, a magnetic field at SNR shocks largely exceeding the…

高能天体物理现象 · 物理学 2015-06-18 F. Fraschetti

A goal of supernova remnant (SNR) evolution models is to relate fundamental parameters of a supernova (SN) explosion and progenitor star to the current state of its SNR. The SNR hot plasma is characterized by its observed X-ray spectrum,…

星系天体物理 · 物理学 2019-10-02 D. A. Leahy , Yuyang Wang , Bryson Lawton , Sujith Ranasinghe , Miroslav Filipovic

The bulk of the cosmic rays up to about 100 TeV are thought to be accelerated by the 1st order Fermi mechanism at supernova shocks, producing a power-law spectrum. Both electrons and protons should be accelerated, but their ratio on…

天体物理学 · 物理学 2011-05-12 T. K. Gaisser , R. J. Protheroe , T. Stanev

Using a semianalytical approach based on the thin-shell approximation, we calculate the long-term evolution of supernova remnants (SNRs) while also accounting for the cosmic rays (CRs) accelerated at their blast waves. Our solution…

高能天体物理现象 · 物理学 2018-09-12 Rebecca Diesing , Damiano Caprioli

The relativistic mean-field plus RPA calculations, based on effective Lagrangians with density-dependent meson-nucleon vertex functions, are employed in a microscopic analysis of the nuclear matter compressibility and symmetry energy. We…

核理论 · 物理学 2008-11-26 D. Vretenar , T. Niksic , P. Ring