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相关论文: A statistical approach to radio emission from shel…

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Radio relics are Mpc-sized synchrotron sources located in the peripheral regions of galaxy clusters. Models based on the diffuse shock acceleration (DSA) scenario have been widely accepted to explain the formation of radio relics. However,…

宇宙学与河外天体物理 · 物理学 2022-10-05 Yihao Zhou , Haiguang Xu , Zhenghao Zhu , Yuanyuan Zhao , Shida Fan , Chenxi Shan , Yongkai Zhu , Lei Hao , Li Ji , Zhongli Zhang , Xianzhong Zheng

Supernovae remnants (SNRs) represent a major feedback source from stars on the interstellar medium of galaxies. During the latest stage of supernovae explosions, shock waves produced by the initial blast modify the chemistry of gas and…

We examined correlations between young radio pulsars (PSRs), Supernova remnants (SNRs) which have different surface brightness values and young star formation regions (SFRs). Angular correlation of PSRs with SFRs is reliable up to 4 kpc and…

天体物理学 · 物理学 2007-05-23 Sevinc O. Tagieva , Oktay H. Guseinov , Askin Ankay

Supernova remnants (SNR) are now widely believed to be a source of cosmic rays (CRs) up to an energy of 1 PeV. The magnetic fields required to accelerate CRs to sufficiently high energies need to be much higher than can result from…

天体物理学 · 物理学 2008-10-30 K. M. Schure , J. Vink , A. Achterberg , R. Keppens

The shell-type supernova remnant (SNR) G206.7+5.9 was recently discovered in the radio band with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The remnant spans about 3.5 in diameter and exhibits bilateral shells. In…

高能天体物理现象 · 物理学 2025-01-29 Hicran Bakis , Ebru Aktekin , Volkan Bakis , Hidetoshi Sano , Aytap Sezer

In the core-collapse scenario, the supernova remnants evolve inside the complex wind-blown bubbles, structured by massive progenitors during their lifetime. Therefore, particle acceleration and the emissions from these SNRs can carry the…

高能天体物理现象 · 物理学 2024-08-29 Samata Das , Robert Brose , Martin Pohl , Dominique M. -A. Meyer , Iurii Sushch

The very-high-energy (VHE; E > 100 GeV) gamma-ray emission observed from a number of Supernova remnants (SNRs) indicates particle acceleration to high energies at the shock of the remnants and a potentially significant contribution to…

高能天体物理现象 · 物理学 2022-03-02 Iurii Sushch , Robert Brose , Martin Pohl , Pavlo Plotko , Samata Das

In spite of their key role in galaxy evolution and several decades of observational efforts, the census of supernova remnants (SNRs) in our Galaxy remains incomplete. Theoretical predictions based on the local supernova rate estimate the…

高能天体物理现象 · 物理学 2024-10-16 K. Tsalapatas , M. Arias , T. Shimwell , K. Rajwade , M. J. Hardcastle , A. Drabent

Molecular clouds are known to be clumpy, with dense molecular clumps occupying only a few percent of the volume. A supernova remnant then evolves primarily in the interclump medium, and becomes radiative at a radius of about 6 pc, forming a…

天体物理学 · 物理学 2009-10-30 Roger A. Chevalier

To date, over 220 emission nebulae in M33 have been identified as supernova remnants (SNRs) or SNR candidates, principally through [SII]:Halpha line ratios that are elevated compared to those in H II regions. In many cases, the…

星系天体物理 · 物理学 2018-04-04 Knox S. Long , William P. Blair , Dan Milisavljevic , John C. Raymond , P. Frank Winkler

The idea that the shocks from supernova remnants (SNR) expanding into the interstellar medium (ISM) accelerate CR is still popular one but a number of authors have drawn attention to the fact that the experimental evidence for the presence…

天体物理学 · 物理学 2008-11-26 A. D. Erlykin , A. W. Wolfendale

The vast majority of Galactic supernova remnants (SNRs) were detected by their synchrotron radio emission. Recently, the evolved SNR G107.0+9.0 with a diameter of about 3~deg or 75~pc up to 100~pc in size was optically detected with an…

星系天体物理 · 物理学 2021-11-03 Wolfgang Reich , Xuyang Gao , Patricia Reich

Two main physical mechanisms are used to explain supernova explosions: thermonuclear explosion of a white dwarf(Type Ia) and core collapse of a massive star (Type II and Type Ib/Ic). Type Ia supernovae serve as distance indicators that led…

太阳与恒星天体物理 · 物理学 2015-01-21 Lingzhi Wang , Xiaohong Cui , Hui Zhu , Wenwu Tian , Xiaofeng Wang

By combining the photometric, spectroscopic, and astrometric information of the stars in the sightline of SNRs, the distances to and the extinctions of 32 Galactic supernova remnants (SNRs) are investigated. The stellar atmospheric…

太阳与恒星天体物理 · 物理学 2020-03-25 He Zhao , Biwei Jiang , Jun Li , Bingqiu Chen , Bin Yu , Ye Wang

Young pulsars and the pulsar wind nebulae (PWNe) or supernova remnants (SNRs) that surround them are some of the most dynamic and high-powered environments in our Universe. With the rise of more sensitive observations, the number of…

高能天体物理现象 · 物理学 2020-02-19 Samayra M. Straal , Liam Connor , Joeri van Leeuwen

The supernova remnant (SNR) G288.8-6.3 was recently discovered as a faint radio shell at large Galactic latitude using observations with ASKAP in the EMU survey. Here, we make the first detailed investigation of the $\gamma$-ray emission…

Published X-ray emission properties for a sample of 50 supernova remnants (SNRs) in the LMC are used as input for SNR evolution modelling calculations. The forward shock emission is modelled to obtain the initial explosion energy, age, and…

高能天体物理现象 · 物理学 2017-03-08 D. A. Leahy

A multipole expansion analysis is applied to 1420 MHz radio continuum images of supernova remnants (SNRs) in order to compare Type Ia and core collapse (CC) SNRs. Because the radio synchrotron emission is produced at the outer shock between…

高能天体物理现象 · 物理学 2019-09-27 Sujith Ranasinghe , Denis Leahy

High resolution radio observations of the composite supernova remnant (SNR) G326.3-1.8 or MSH 15-56 with the Australia Telescope Compact Array show details of both the shell and the bright plerion which is offset about 1/3 of the distance…

天体物理学 · 物理学 2016-08-30 J. Dickel , D. Milne , R. Strom

The study of core-collapse supernova remnants (SNRs) presents a fascinating puzzle, with intricate morphologies and a non-uniform distribution of stellar debris. Particularly, young remnants (aged less than 5000 years) hold immense value as…

高能天体物理现象 · 物理学 2023-11-10 Salvatore Orlando