Spin change of a proto-neutron star by the emission of neutrinos
- Title
- Spin change of a proto-neutron star by the emission of neutrinos
- Author
- 류충열
- Keywords
- NUCLEAR-MATTER; BIRTH; EVOLUTION; MODEL
- Issue Date
- 2012-04
- Publisher
- AMERICAN PHYSICAL SOC
- Citation
- PHYSICAL REVIEW C, v. 85, no. 4, Page. 045803-1-045803-7
- Abstract
- We investigate the structure of proto-neutron stars (PNSs) with trapped neutrinos by using a quark-meson coupling model. We adopt a phenomenological lepton density which is diffuse near the surface. We calculate the populations of baryons and leptons, the equations of state, and the mass-radius relation for isentropic PNS models. In addition, the moment of inertia is calculated for both PNS and cold-neutron-star (CNS) models as a means to study the change of the spin period due to the neutrino emission from a PNS. Neutrino emission from a hyperonic neutron star is shown to increase the spin by about 10% of the initial spin, while the spin of a nucleonic neutron star with a central density above rho(C) approximate to 5 rho(0) is decreased by a few % by the emission of neutrinos. Therefore, the spin change owing to the leakage of neutrinos from a PNS is a small (<10%) correction compared to other processes related to the spin change.
- URI
- http://hdl.handle.net/20.500.11754/42578https://journals.aps.org/prc/abstract/10.1103/PhysRevC.85.045803
- ISSN
- 0556-2813
- DOI
- 10.1103/PhysRevC.85.045803
- Appears in Collections:
- OFFICE OF ACADEMIC AFFAIRS[S](교무처) > ETC
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML