On the minimum and maximum mass of neutron stars and the delayed collapse
Sektion Physik, Ludwig-Maximilians Universität München, Am Coulombwall 1, 85748 Garching, Germany
Corresponding author: K. Strobel, Klaus.Strobel@physik.uni-muenchen.de
Accepted: 28 November 2000
The minimum and maximum mass of protoneutron stars and neutron stars are investigated. The hot dense matter is described by relativistic (including hyperons) and non-relativistic equations of state. We show that the minimum mass (∼ 0.88-1.28 ) of a neutron star is determined by the earliest stage of its evolution and is nearly unaffected by the presence of hyperons. The maximum mass of a neutron star is limited by the protoneutron star or hot neutron star stage. Further we find that the delayed collapse of a neutron star into a black hole during deleptonization is not only possible for equations of state with softening components, as for instance, hyperons, meson condensates etc., but also for neutron stars with a pure nucleonic-leptonic equation of state.
Key words: stars: evolution / stars: neutron / dense matter / equation of state
© ESO, 2001