Publication
Modos r de oscilação em estrelas de neutrões
| dc.contributor.advisor | Sá, Paulo | |
| dc.contributor.author | Lehodey, Brigitte Melo Tomé | |
| dc.date.accessioned | 2011-09-07T16:04:16Z | |
| dc.date.available | 2011-09-07T16:04:16Z | |
| dc.date.issued | 2007 | |
| dc.description | Tese dout., Física - Astrofísica, Universidade do Algarve, 2007 | por |
| dc.description.abstract | This thesis is devoted to the study of r-modes in neutron stars. Its aim is to determine the in°uence of di®erential rotation on the evolution of the r-mode insta- bility and on the detectability of gravitational waves from the r-mode. Di®erential rotation, as shown recently, is an unavoidable feature of nonlinear r-modes. We analyse the role played by this di®erential rotation on the evolution of the r-mode instability in newly-born neutron stars. We show that, due to the presence of dif- ferential rotation, the amplitude of the r-mode saturates in a natural way, whereas the angular velocity of the star decreases to values compatible with observational data. We also study the detectability of gravitational waves emitted by newly-born neutron stars, due to the r-mode instability, taking into account di®erential rotation. We show that the detectability of these waves depends crucially on the di®erential rotation associated to the r-mode instability. For small initial di®erential rotation, gravitational waves could be detected by the advanced laser interferometer detectors LIGO and Virgo, if the neutron star is located less than 20 Mpc away from Earth. | eng |
| dc.description.sponsorship | Faculdade de Ciências e Tecnologia ( FCT) | por |
| dc.format | application/pdf | por |
| dc.identifier.other | 524 LEH*Mod Cave | |
| dc.identifier.tid | 101168535 | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/255 | |
| dc.language.iso | por | por |
| dc.subject | Teses | por |
| dc.subject | Astrofísica | por |
| dc.subject | Estrelas | por |
| dc.subject | Grevitação universal | por |
| dc.subject | Rotação | por |
| dc.title | Modos r de oscilação em estrelas de neutrões | por |
| dc.type | doctoral thesis | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | por |
| rcaap.type | doctoralThesis | por |
| thesis.degree.grantor | Universidade do Algarve. Faculdade de Ciências e Tecnologias | por |
| thesis.degree.level | Doutor | por |
| thesis.degree.name | Doutoramento em Física. Astrofísica | por |
Files
Original bundle
1 - 1 of 1