Magnetic Dipole-Quadrupole Interaction field of Neutron Star
| dc.contributor.advisor | Wetro, Legesse (PhD) | |
| dc.contributor.author | Muleta, Gemechu | |
| dc.date.accessioned | 2018-06-25T13:15:07Z | |
| dc.date.accessioned | 2023-11-09T11:23:33Z | |
| dc.date.available | 2018-06-25T13:15:07Z | |
| dc.date.available | 2023-11-09T11:23:33Z | |
| dc.date.issued | 2013-06 | |
| dc.description.abstract | Pulsurs are fast spinning ( 104 Hz) and highly magnetized (101314G) neutron stars(NSs), compact objects (R 10 km; 101314g=cm3) resulting from supernova explosions that normally occur at the ends of the lives of massive stars.Measurements of electromagnetic emission related to curvature radiation from known pulsurs such as Crab or Vela pulsur strongly indicate that the mag- netic eld structure near the surface of these objects sigini cantly di er from the customarily expected pure star centered dipole structure.Scientists now believe that possible non-dipolar components in the magnetic eld structure will resolve this long time issue.The structure of magnetic eld lines also de nes the type and geometry of accretion discs around neutron star in binaries.In this thesis we have determined the geometry of the combined dipole and quadrupole magnetic eld lines. In idealized situations the eld lines near these compact objects are closed; but they may be open at large distances due to interactions with magnetic elds or stress energy from other sources such as the accretion discs, for example.The method we used is simulating eld line with matlab.The result shows the eld lines are open at a given distance from the surface of the star (at rmax) and it has only one solution of r( ) for a speci c angle in one quadrant.There are three neutral lines for r( ) and the eld line is more bulged than the pure dipole and quadrupole | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/3330 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Magnetic Dipole-Quadrupole | en_US |
| dc.title | Magnetic Dipole-Quadrupole Interaction field of Neutron Star | en_US |
| dc.type | Thesis | en_US |