Super-Massive Neutron Stars
| dc.creator | Freire, Paulo C. C. | |
| dc.date | 2007-11-30 | |
| dc.date.accessioned | 2026-07-07T11:13:28Z | |
| dc.date.available | 2026-07-07T11:13:28Z | |
| dc.description | We present here the results of Arecibo timing of PSR B1516+02B, a 7.95-ms pulsar in a binary system with a ~0.17 solar mass companion and an orbital period of 6.85 days located in the globular cluster M5. The eccentricity of the orbit (e = 0.14) has allowed a measurement of the rate of advance of periastron: (0.0136 +/- 0.0007) degrees per year. It is very likely that the periastron advance is due to the effects of general relativity; the total mass of the binary system is (2.14 +/-0.16) solar masses. The small measured mass function implies, in a statistical sense, that a very large fraction of this total mass is contained in the pulsar: (1.94+0.17 -0.19) solar masses (1-sigma); there is a 5% probability that the mass of this object is below 1.59 solar masses. With the possible exception of PSR J1748-2021B, this is the largest neutron star mass measured to date. When combined with similar measurements made previously for Terzan 5 I and J, we can exclude, in a statistical sense, the ``soft'' equations of state for dense neutron matter, implying that matter at the center of a neutron star is highly incompressible. There is also some evidence for a bimodal distribution of MSP masses, the reasons for that are not clear. | |
| dc.description | 5 pages, one table, 2 figures. To appear in the proceedings of "40 Years of Pulsars: Millisecond Pulsars, Magnetars, and More", August 12-17, 2007, McGill University, Montreal, Canada | |
| dc.identifier | https://arxiv.org/abs/0712.0024 | |
| dc.identifier | http://arxiv.org/abs/0712.0024 | |
| dc.identifier | AIPConf.Proc.983:459-463,2008 | |
| dc.identifier | doi:10.1063/1.2900274 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/191731 | |
| dc.subject | Astrophysics | |
| dc.title | Super-Massive Neutron Stars | |
| dc.type | text |