Roger A. Chevalier

TL;DR: Gamma-ray astronomy explores the most energetic photons in nature to address some of the most pressing puzzles in contemporary astrophysics as discussed by the authors, and it encompasses a wide range of objects and phenomena: stars, supernovae, novae, neutron stars, stellar-mass black holes, nucleosynthesis, the interstellar medium, cosmic rays and relativistic-particle acceleration.

TL;DR: In this article, the authors focused on a similar or equal to 1.5 arcmin(2) region located along the eastern limb of the remnant where they identify three main classes of outer ejecta: (1) knots dominated by [N(II)] lambda lambda 6548, 6583 emission, especially [O(II)) lambda lambda 7319, 7330, and (3) knots with emission-line strengths similar to the [S(II)-strong fast-moving knot (FMK) ejecta commonly seen in the main emission shell).

TL;DR: In this article, the authors attributed the radio increase to the interaction of the SN shock with this density jump, and the required efficiency of electron acceleration and magnetic field amplification is larger than usually occurs in SNe and SNR.

TL;DR: In this paper, it is argued that the millisecond pulsar in SN1987A has been spun up by accretion, and the accreted angular momentum in this case comes from the mixed mantle and helium core of the ejecta, of which roughly 0.1 solar mass fell back during the first day after the explosion.