98 bis boulevard Arago - 75014 Paris

From Cosmic Strings to CMB Observations

NEWS

Welcome cocktail

A welcome cocktail will take place on Wednesday, 23rd from 5.30 pm to 8.00 pm at IAP.

 

Conference dinner

The dinner will take place on Thursday, March 24th (7.30 pm, smart dress code) at the Luxembourg Palace (Sénat).

Program



Friday 25th March

9.30-10.00: A. Stebbins "The Other FRBs" abstractMysteriously bright FRBs have been spotted in Australia and North America. Many believe they come from cosmological distances and extrapolations suggest they come from all directions and arrive at the astonishing rate of ~10,000 per day. While their origin is not really understood a cosmological origin would make then a new and powerful probe of cosmology and a useful tool in a number of other areas of astrophysics.
 
10.00-10.30: J.-F. Cardoso "The CMB and the CMB" abstractThe CMB (Cosmic Microwave Background) is a thing of wonder. It is easily observed in the centimetre domain by simply positioning a large satellite at the second Sun-Earth Lagrange point for about 30 months. Just keep the bolometers cool (with a basic He3-He4 dilution scheme) and get plenty of signal in 9 frequency channels. That is very straightforward but --unfortunately-- only yields some CMB (Completely Mixed-up Bolometric output) because there are so many astrophysical emissions out there, hitting our detectors. In order to get the CMB from the CMB, one can take advantage of spectral diversity: viewing the sky at several frequencies allows component separation techniques to extract a clean CMB map from several contaminated channels. In this talk, I will explain how it was done for Planck and why it is possible to do it blindly.
 
10.30-11.00: J.L. Puget "CMB polarisation on large scale: transition from sensitivity to foreground limits" abstractLarge scale CMB polarization data provide key informations for cosmological parameters by a nearly independant determination of the reionization optical depth and a key tool to explore the primordial tensor to scalar ratio. These measurements have been limited by the instrument sensitivity until recently when the foregrounds removal became the main problem. These limitations will be explored using the Planck data.
 
11.00-11.30: Coffee Break
 
11.30-12.00: G. Efstathiou "Francois's Contribution to Inflation (via Skype)"
 
12.00-12.30: B. Wandelt "Tisser la toile cosmique avec des cordes - Inventions non-gaussiennes à deux, trois et quatre points"
 
12.30-13.00: S. Colombi "Conclusions"
 
UMR7095 - Institut d'Astrophysique de Paris - 98 bis boulevard Arago - 75014 Paris - Phone 33 (1) 44 32 80 00 - Fax 33 (1) 44 32 80 01