Séminaire / Seminar GReCO |
| « Gravitational wave bursts from cosmic strings with junctions » |
|
A. Bohé |
| Cosmic strings are predicted to form in a wide variety of models in the early universe but so far, they have never been observed. The most promising way do so relies on their emission of gravitational wave bursts which could be detectable by the current generation of interferometers (LIGO-VIRGO) or by the future space interferometer LISA. In this seminar, I will focus on a particular class of models of cosmic strings in which junctions (points at which several strings are attached) can form. I will show that strings with junctions emit more types of bursts, and that they generally contain many more kinks than ordinary cosmic strings. Consequently, the signal from a network with junctions differs significantly from the predictions made by Damour and Vilenkin for ordinary strings. I will discuss the observability of this signal and the associated constraints on the parameter space of the strings. |
|
lundi 8 février 2010 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |