An X‐Ray Search for Compact Central Sources in Supernova Remnants. I. SNR <scp>s</scp> G093.3+6.9, G315.4−2.3, G084.2+0.8, and G127.1+0.5
An X‐Ray Search for Compact Central Sources in Supernova Remnants. I. SNR <scp>s</scp> G093.3+6.9, G315.4−2.3, G084.2+0.8, and G127.1+0.5
Most astronomers now accept that stars more massive than about 9 M⊙ explode as supernovae and leave stellar remnants, either neutron stars or black holes, with neutron stars being more prevalent. Recent modeling of the explosions suggests a significant diversity in the key natal properties—rotation rate, velocity, and magnetic field …