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Supernova Remnants

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Supernova Explosions

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Abstract

In this chapter addresses the nature of supernova remnants (SNRs) that are formed as the ejecta plow into circumstellar and interstellar media. Hundreds of SNRs are known in the Milky Way and nearby galaxies, primarily revealed by their radio and X-ray flux. The discussion outlines the key phases of SNR evolution: early free expansion, the adiabatic or Sedov phase, and the radiative, snowplow phase. The focus then turns to young SNRs in the Galaxy that still carry information on the original supernova explosion. The supernova of about 1680 that produced the Cassiopeia A (Cas A) SNR was a Type IIb event that now shows distinct asymmetries and a dim compact remnant. The Crab Nebula, produced by a supernova of 1054, has many distinctive properties, including its pulsar and associated pulsar-wind nebula. The star that exploded probably was a red supergiant of modest mass. The remnant of SN 1181 shows some similarities to the Crab. The remnant of Tycho Brahe’s supernova of 1572 is that of a typical SN Ia. The SNRs of SN 1006 and that seen by Johannes Kepler in 1604 are virtually certain remnants of SN Ia, though SN 1604 is likely to be interacting with circumstellar matter. The discussion also covers the remnant of SN 185, the very young SNR G1.9+0.3, and the remnant of SN 1885A in Andromeda.

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Notes

  1. 1.

    The SNR G354.4+0.0 may have an age of 100–500 years (Roy and Pal 2013).

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Branch, D., Wheeler, J.C. (2017). Supernova Remnants. In: Supernova Explosions. Astronomy and Astrophysics Library. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-55054-0_7

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  • DOI: https://doi.org/10.1007/978-3-662-55054-0_7

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-662-55052-6

  • Online ISBN: 978-3-662-55054-0

  • eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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