|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Cosmic strings, effective number of neutrinos, gravity waves and the CMB
If you have a question about this talk, please contact Mustapha Amrani.
Topological Dynamics in the Physical and Biological Sciences
We will report about recent work concerning cosmic defects, gravity waves and the CMB . On one hand, we simulate a scaling network of cosmic defects, and predict the background gravity wave emission coming from them. On the other, we study degeneracies in the CMB data between cosmic strings and gravity waves. When one tries to fit the CMB data with the effective number of neutrinos as a free parameter, the data prefers a higher number effective neutrinos. There have been works suggesting that the extra relativistic signal could come from gravity waves, and those waves could be created by cosmic defects. We perform a full analysis of the system taking into account the signal that such a network would create, its effect into the effective number of neutrinos, and how those parameters interplay in trying to fit different probes of CMB and other cosmological data.
This talk is part of the Isaac Newton Institute Seminar Series series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsCIDC/Dept. of Veterinary Medicine University of Cambridge Kendo Society Chinese Culture Events
Other talksThe evolution of Business Models [Provisional - TBC] The 2015 Controlling Cancer Summit 'Reviving Sati's Corpse' (title to be confirmed) Folded self-dual geometry Cambridge in the Fifties and Sixties: an extended conversation Sovereignty and Imperialism: Non-European Powers in the Age of Empire