Rayleigh-Taylor instabilities in Type Ia supernova remnants undergoing cosmic ray particle acceleration - low adiabatic index solutions

Supernova remnants, owing to their strong shock waves, are likely sources of Galactic cosmic rays. Studies of supernova remnants in X-rays and gamma rays provide us with new insights into the acceleration of particles to high energies. This paper reviews the basic physics of supernova remnant shocks and associated particle acceleration and radiation processes. In addition, the study of supernova remnant populations in nearby galaxies and the implications for Galactic cosmic ray distribution are discussed.

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Subdwarf B stars as possible surviving companions in Type Ia supernova remnants

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/sty3092 ◽

2018 ◽

Vol 482 (4) ◽

pp. 5651-5665 ◽

Cited By ~ 11

Author(s):

Xiangcun Meng ◽

Jiao Li

Keyword(s):

Supernova Remnants ◽

B Stars ◽

Subdwarf B Stars ◽

Type Ia Supernova ◽

Type Ia

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Dust Destruction in Type Ia Supernova Remnants in the Large Magellanic Cloud

The Astrophysical Journal ◽

10.1086/504472 ◽

2006 ◽

Vol 642 (2) ◽

pp. L141-L144 ◽

Cited By ~ 64

Author(s):

Kazimierz J. Borkowski ◽

Brian J. Williams ◽

Stephen P. Reynolds ◽

William P. Blair ◽

Parviz Ghavamian ◽

...

Keyword(s):

Supernova Remnants ◽

Large Magellanic Cloud ◽

Magellanic Cloud ◽

Type Ia Supernova ◽

Type Ia ◽

Dust Destruction

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Dust in historical Galactic Type Ia supernova remnants with Herschel★

Monthly Notices of the Royal Astronomical Society ◽

10.1111/j.1365-2966.2011.20272.x ◽

2012 ◽

Vol 420 (4) ◽

pp. 3557-3573 ◽

Cited By ~ 69

Author(s):

H. L. Gomez ◽

C. J. R. Clark ◽

T. Nozawa ◽

O. Krause ◽

E. L. Gomez ◽

...

Keyword(s):

Supernova Remnants ◽

Type Ia Supernova ◽

Type Ia

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Particle acceleration in winds of star clusters

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stab690 ◽

2021 ◽

Author(s):

G Morlino ◽

P Blasi ◽

E Peretti ◽

P Cristofari

Keyword(s):

Particle Acceleration ◽

Cosmic Rays ◽

Supernova Remnants ◽

Star Clusters ◽

Cosmic Ray ◽

Maximum Energy ◽

Termination Shock ◽

Shock Acceleration ◽

Acceleration Process ◽

Diffusive Shock Acceleration

Abstract The origin of cosmic rays in our Galaxy remains a subject of active debate. While supernova remnant shocks are often invoked as the sites of acceleration, it is now widely accepted that the difficulties of such sources in reaching PeV energies are daunting and it seems likely that only a subclass of rare remnants can satisfy the necessary conditions. Moreover the spectra of cosmic rays escaping the remnants have a complex shape that is not obviously the same as the spectra observed at the Earth. Here we investigate the process of particle acceleration at the termination shock that develops in the bubble excavated by star clusters’ winds in the interstellar medium. While the main limitation to the maximum energy in supernova remnants comes from the need for effective wave excitation upstream so as to confine particles in the near-shock region and speed up the acceleration process, at the termination shock of star clusters the confinement of particles upstream in guaranteed by the geometry of the problem. We develop a theory of diffusive shock acceleration at such shock and we find that the maximum energy may reach the PeV region for powerful clusters in the high end of the luminosity tail for these sources. A crucial role in this problem is played by the dissipation of energy in the wind to magnetic perturbations. Under reasonable conditions the spectrum of the accelerated particles has a power law shape with a slope 4÷4.3, in agreement with what is required based upon standard models of cosmic ray transport in the Galaxy.

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