If a neutron star were to replace a white dwarf in a binary system undergoing a Type Ia supernova, it would significantly alter the dynamics and outcome of the supernova event. Let's explore some possible scenarios:
Disruption of the Neutron Star: Type Ia supernovae occur due to the ignition and runaway thermonuclear explosion of a white dwarf star. Neutron stars, on the other hand, are incredibly dense remnants of massive stars and have different physical properties. If a neutron star were to replace the white dwarf, it would likely be too massive and compact to undergo a similar thermonuclear explosion. The gravitational forces and extreme densities of the neutron star would prevent it from reaching the critical conditions necessary for a Type Ia supernova.
Accretion onto the Neutron Star: In a binary system, if the neutron star accretes mass from its companion star, it can lead to various phenomena, such as X-ray emissions from the accretion disk or the formation of a pulsar. However, the accretion process onto a neutron star would likely differ significantly from the conditions required for a Type Ia supernova. The explosion mechanism of Type Ia supernovae relies on the specific properties and behavior of white dwarfs.
It's important to note that our understanding of Type Ia supernovae is primarily based on the explosion mechanism involving white dwarfs. Replacing the white dwarf with a neutron star would fundamentally alter the physics and dynamics of the system, making it difficult to predict the exact outcome. The behavior of a binary system with a neutron star and its potential for a supernova event would require further research and theoretical modeling to fully understand.