The boundary between explosion and collapse in very massive objects

Details The boundary between explosion and collapse in very massive objects The boundary between explosion and collapse in very massive objects

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sscr.conf..303b&link_type=abstract

In: Supernovae: A survey of current research; Proceedings of the Advanced Study Institute, Cambridge, England, June 29-July 10,

Astronomy and Astrophysics

Astronomy

6

Critical Mass, Gravitational Collapse, Stellar Evolution, Stellar Models, Supermassive Stars, Thermonuclear Reactions, Black Holes (Astronomy), Entropy, Oxygen, Pair Production, Pressure Distribution, Silicon, Stellar Mass

Scientific paper

A simple model to calculate the critical mass which determined whether the core of a very massive object (VMO) would have collapsed into a black hole or whether the VMO would have undergone complete thermonuclear disruption is outlined. The entropic view of oxygen core evolution is applied to the model. The effects of pair instability, oxygen and silicon burning, and alpha quenching on a global effective potential are calculated, allowing the critical oxygen core mass for black hole formation to be predicted along with the abundance ratio of oxygen burning products to oxygen in those VMOs that explode. The critical oxygen core mass is estimated to be 100 solar masses, corresponding to an initial star mass of over 220 solar masses. This estimate is considered to be too low, due to the assumption in the model that an entropy and pressure discontinuity can be maintained between burned and unburned regions.

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