## Stable ultracompact objects and an upper bound on neutron star masses
We have proposed a core-envelope model with stiffest equation of
state [speed of sound equal to that of light] in the core and a
polytropic equation with constant adiabatic index
=
[dd in
the envelope and obtained a stable configuration with a maximum value
of when the ratio of pressure to
density at the core-envelope boundary reaches about 0.014. The maximum
mass of neutron star based upon this model comes out to be
, if the (average) density of the
configuration is constrained by fastest rotating pulsar, with rotation
period, ms, known to date. The
average density of the configuration turns out to be
g cm
## Contents- 1. Introduction
- 2. Removal of abnormality in the stiffest equation and upper bound on neutron star masses
- 3. Methodology and the core envelope model
- 4. Results and conclusions
- Acknowledgements
- References
© European Southern Observatory (ESO) 2000 Online publication: December 17, 1999 |