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Multi-wavelength observations of mature supernova remnants (SNRs), especially with recent advances in gamma-ray astronomy, make it possible to constrain energy distribution of energetic particles within these remnants. In consideration of…

High Energy Astrophysical Phenomena · Physics 2017-01-18 Houdun Zeng , Yuliang Xin , Siming Liu , J. R. Jokipii , Li Zhang , Shuinai Zhang

We compare the $\gamma$-ray spectra from 10 middle-aged supernova remnants (SNRs), which are interacting with molecular clouds (MCs), with the model prediction from widely used escaping scenario and direct interaction scenario. It is found…

High Energy Astrophysical Phenomena · Physics 2018-08-15 Xiaping Tang

Recent progress in numerical simulations of thermonuclear supernova explosions brings up a unique opportunity in studying the progenitors of Type Ia supernovae. Coupling state-of-the-art explosion models with detailed hydrodynamical…

High Energy Astrophysical Phenomena · Physics 2015-03-26 D. Kosenko , W. Hillebrandt , M. Kromer , S. I. Blinnikov , R. Pakmor , J. S. Kaastra

X-ray emitting features originating from the interaction of supernova shock waves with small interstellar gas clouds are revealed in many X-ray observations of evolved supernova remnants (e.g. Cygnus Loop and Vela), but their interpretation…

High Energy Astrophysical Phenomena · Physics 2015-05-18 S. Orlando , F. Bocchino , M. Miceli , X. Zhou , F. Reale , G. Peres

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…

High Energy Astrophysical Phenomena · Physics 2024-08-29 Samata Das , Robert Brose , Martin Pohl , Dominique M. -A. Meyer , Iurii Sushch

We explore the role of anisotropic thermal conduction on the evolution of supernova remnants through interstellar media with a range of densities via numerical simulations. We find that a remnant expanding in a dense environment can produce…

Astrophysics · Physics 2009-11-11 David A. Tilley , Dinshaw S. Balsara , J. Christopher Howk

We construct the most complete sample of supernova remnants (SNRs) in any galaxy - the Large Magellanic Cloud (LMC) SNR sample. We study their various properties such as spectral index ($\alpha$), size and surface-brightness. We suggest an…

We present Chandra X-ray observations of the supernova remnant (SNR) N63A in the Large Magellanic Cloud (LMC). N63A, one of the brightest LMC remnants, is embedded in an H II region and probably associated with an OB association. The…

Astrophysics · Physics 2009-11-07 Jessica S. Warren , John P. Hughes , Patrick O. Slane

We present numerical simulations that include 1-D Eulerian multi-group radiation-hydrodynamics, 1-D non-LTE radiative transfer, and 2-D polarised radiative transfer for super-luminous interacting supernovae (SNe). Our reference model is a…

Solar and Stellar Astrophysics · Physics 2015-06-24 Luc Dessart , Edouard Audit , D. John Hillier

Recent studies using 21 cm HI line and $^{13}$CO line observations in the inner part of the Galaxy have resulted in new distances for 30 Galactic supernova remnants (SNRs). 15 of those remnants have observed X-ray spectra, for which…

Astrophysics of Galaxies · Physics 2018-10-17 D. A. Leahy , S. Ranasinghe

The transition from supernovae (SNe) to supernova remnants (SNRs) remains poorly understood, given the age gap between well-studied examples of the two. In order to bridge this gap, we analysed archival Chandra data for some of the oldest…

High Energy Astrophysical Phenomena · Physics 2021-08-24 Vandana Ramakrishnan , Vikram V. Dwarkadas

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…

High Energy Astrophysical Phenomena · Physics 2023-11-10 Salvatore Orlando

We examine the evolution and emission of the supernova remnant (SNR) CTB109 using three-dimensional magnetohydrodynamics simulations. The SNR evolves in a medium divided by a plane interface into two media with different densities and…

High Energy Astrophysical Phenomena · Physics 2021-11-17 A. Castellanos-Ramírez , P. F. Velázquez , J. Cantó

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…

High Energy Astrophysical Phenomena · Physics 2017-03-08 D. A. Leahy

The N206 supernova remnant (SNR) in the Large Magellanic Cloud (LMC) has long been considered a prototypical "mixed morphology" SNR. Recent observations, however, have added a new twist to this familiar plot: an elongated, radially-oriented…

We present a detailed X-ray spectral analysis of 13 supernova remnants (SNR) in the Small Magellanic Cloud (SMC). We apply both single-temperature non-equilibrium ionisation models and models based on the Sedov similarity solution, where…

Astrophysics · Physics 2009-11-10 K. J. van der Heyden , J. A. M. Bleeker , J. S. Kaastra

Improved calculations of X-ray spectra for supernova remnants (SNRs) in the Sedov-Taylor phase are reported, which for the first time include reliable atomic data for Fe L-shell lines. This new set of Sedov models also allows for a partial…

Astrophysics · Physics 2009-10-31 K. J. Borkowski , W. J. Lyerly , S. P. Reynolds

Core-collapse supernovae (SNe) expand into a medium created by winds from the pre-SN progenitor. The SN explosion and resulting shock wave(s) heat up the surrounding plasma, giving rise to thermal X-ray emission, which depends on the…

High Energy Astrophysical Phenomena · Physics 2020-10-07 Vandana Ramakrishnan , Vikram V. Dwarkadas

Shell-type supernova remnants (SNRs) exhibit correlations between radio surface brightness, SNR diameter, and ambient medium density. We investigate these correlations, to extract useful information about the typical evolutionary stage of…

High Energy Astrophysical Phenomena · Physics 2015-05-14 R. Bandiera , O. Petruk

We review the major advances in understanding the morphologies and kinematics of supernova remnants (SNRs). Simulations of SN explosions have improved dramatically over the last few years, and SNRs can be used to test models through…

High Energy Astrophysical Phenomena · Physics 2018-04-11 Laura A. Lopez , Robert A. Fesen