AST201H1 Lecture Notes - Lecture 13: Degenerate Matter, Carbon Detonation, Crab Nebula

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST201H1
• Professor: Bryan Gaensler

Document Summary

Ast201- lecture 13: the lifecycle of a 1 solar mass star. Figure 1(credit: pearson education: fusion- combining nuclear particles together to make different element, fission- splitting nucleus apart to make different elements. If sun of final products weighs less than sum of what we start with, energy is released: e= mc2. Betelgeuse is about 20 solar masses but about 770 solar diameters. By time they develop iron cores, massive stars are huge. Betelgeuse is about 20 solar masses but about 770 solar diameters: no more core -> gravity starts to win over pressure, further collapse is prevented via neutron degeneracy pressure. Rest of star rushes in at 20% of speed of light (0. 2c) & hits an immovable ball of neutrons: the inrushing material rebounds explosively & star tears itself apart, called supernova. Supernova remnant left fro(cid:373) kepler"s super(cid:374)ova of 1604. Crab nebula, a supernova remnant left from a supernova in 1054.