The combination of protons and electrons due to the enormous temperatures produce a neutron core.
A Neutron Star has been formed.
Very small, radius of less than 30 km! Extremely dense.
Oppenheimer-Volkoff Limit- upper limit for the mass of a neutron star beyond which it must collapse to become a black hole . Its value is not known exactly because the properties of neutron degenerate matter can only be estimated, but it is generally thought to be about 2 or 3 solar masses.
A characteristic absorption line often seen in stars is due to ionized helium. It occurs at 468.6 nm. If the spectrum of a star has this line at a measured wavelength of 499.3 nm, what is the recession speed of the star?