The neutrino-dominated disk is regarded as a plausible model for the central engine of Gamma-Ray Bursts. By taking into account magnetic fields and detailed microphysics, we calculate the structure of neutrino-dominat...The neutrino-dominated disk is regarded as a plausible model for the central engine of Gamma-Ray Bursts. By taking into account magnetic fields and detailed microphysics, we calculate the structure of neutrino-dominated disks in the frame of the well-known Paczy nski-Witta potential. The results show that the temperature of the disk is lower than that without magnetic fields, whereas the density is nearly the same as that without magnetic fields. There also exists a significant difference in the electron degeneracy between the above two cases. In addition, we present the variation of the electron fraction with the radius.展开更多
Magnetars are strong magnetized neutron stars which could emit quiescent X-ray, repeating burst of soft gamma ray, and even the giant flares. We investigate the effects of magnetic fields on the structure of isolated ...Magnetars are strong magnetized neutron stars which could emit quiescent X-ray, repeating burst of soft gamma ray, and even the giant flares. We investigate the effects of magnetic fields on the structure of isolated magnetars. The stellar structure together with the magnetic field configuration can be obtained at the same time within a self-consistent procedure. The magnetar mass and radius are found to be weakly enhanced by the strong magnetic fields. Unlike other previous investigations, the magnetic field is unable to violate the mass limit of the neutron stars.展开更多
基金supported by the Innovation Program for Young Scientists of Fujian Province of China (Grant No. 2007F3105)
文摘The neutrino-dominated disk is regarded as a plausible model for the central engine of Gamma-Ray Bursts. By taking into account magnetic fields and detailed microphysics, we calculate the structure of neutrino-dominated disks in the frame of the well-known Paczy nski-Witta potential. The results show that the temperature of the disk is lower than that without magnetic fields, whereas the density is nearly the same as that without magnetic fields. There also exists a significant difference in the electron degeneracy between the above two cases. In addition, we present the variation of the electron fraction with the radius.
基金supported by the National Natural Science Foundation of China(Grant Nos.1140522311175219+4 种基金11275271 and 11435014)the National Program on Key Basic Research Project(Grant No.2013CB834405)the Knowledge Innovation Project of Chinese Academy of Sciences(Grant No.KJCX2-EW-N01)the Funds for Creative Research Groups of China(Grant No.11021504)the Youth Innovation Promotion Association of Chinese Academy of Sciences
文摘Magnetars are strong magnetized neutron stars which could emit quiescent X-ray, repeating burst of soft gamma ray, and even the giant flares. We investigate the effects of magnetic fields on the structure of isolated magnetars. The stellar structure together with the magnetic field configuration can be obtained at the same time within a self-consistent procedure. The magnetar mass and radius are found to be weakly enhanced by the strong magnetic fields. Unlike other previous investigations, the magnetic field is unable to violate the mass limit of the neutron stars.
