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Weekly Seminars for April 2014 Print E-mail
Tuesday April 1st, 2014 - 4,00 pm
Aula Amaldi (Physics Dept., Old Building, 1st Floor)
 
  GENERAL COLLOQUIUM OF THE PHYSICS DEPARTMENT
 
Speaker: Dr. Angiola Orlando

Institution: Department of Physics and Astronomy, University of California at San Diego - USA

Title: Detection of B-mode Polarization in the Cosmic Microwave Background Radiation at Degree Angular Scales with BICEP2.  

Abstract:  
The BICEP2 telescope is an instrument designed to search for the signature of primordial gravitational waves on the polarization of the cosmic microwave background (CMB) at degree angular scales. Such gravitational waves are a generic prediction of inflationary models of the early universe. BICEP2 observed from the South Pole for three seasons from 2010 to 2012, mapping the sky at 150GHz with a planar array of 500 polarization sensitive antenna-coupled TES bolometers. This new detector technology has enabled a large increase in sensitivity with respect to previous instruments. I will present the first results from this instrument, outline the observations and the analysis that led to this result, and discuss its implications for cosmology. 

N.B. - In the following link, you can find the official announcement on the Physics Department website: http://www.phys.uniroma1.it/fisica/sites/default/files/bollettini/bollettino31032014_0.pdf
 
**************************************************
La Segreteria ICRA
c/o Dipartimento di Fisica
Sapienza Università di Roma
P.le A. Moro, 5
I - 00185 ROMA, Italy
tel.: +39 06 4991 4 254
fax: +39 06 4454992
email:
segreteria@icra.it
 
 
 
Tuesday April 1st, 2014 - 5,00 pm
Aula Amaldi (Physics Dept., Old Building, 1st Floor)
 
  Seminar of Astrophysics
 
Speaker: Dr. Alessandro Melchiorri

Institution: Physics Department - Sapienza University of Rome

Title: The impact of the Bicep2 result on cosmology.  

Abstract:  
I will discuss some of the implications of the recent results from the bicep2 experiment for cosmology and fundamental physics. In particular I will focus on inflationary models, neutrino physics and modified gravity scenarios. I will show that the apparent tension on the amplitude of tensor modes between bicep2 and planck experiments could be solved by considering new physics as extra sterile neutrinos. 

N.B. - In the following link, you can find the official announcement on the Physics Department website: http://www.phys.uniroma1.it/fisica/sites/default/files/bollettini/bollettino31032014_0.pdf
 
**************************************************
La Segreteria ICRA
c/o Dipartimento di Fisica
Sapienza Università di Roma
P.le A. Moro, 5
I - 00185 ROMA, Italy
tel.: +39 06 4991 4 254
fax: +39 06 4454992
email:
segreteria@icra.it 
 
 
 
Monday April 7th, 2014 - 3,00 pm
Aula Rasetti (Physics Dept., Old Building, 2nd Floor)
 
  Seminar of Astrophysics
 
Speaker: Dr. Marcelo Alvarez

Institution: Canadian Institute for Theoretical Astrophysics, Toronto (CANADA)

Title: Efficient Realizations of the Observable Universe.  

Abstract:  
Planck, ACT, and SPT are mapping out the microwave sky in unprecedented detail. At the same time, future surveys with such facilities as CHIME, LSST, and SKA will revolutionize the amount of information available to us about the formation of the first stars and black holes, galaxies, and the large scale structure of the universe. Making sense of all this data will require cosmological simulations accurate over a much larger dynamic range than currently possible. I will describe the current open questions that can be answered with this data and present the new computational techniques we are developing to tackle this problem. Particular focus will be placed upon fast reionization simulations that use the excursion set formalism and accurate large scale structure calculations using a massively parallel implementation of the peak patch approach. 

N.B. - In the following link, you can find the non official announcement on the Physics Department website: https://agenda.infn.it/conferenceDisplay.py?confId=7674
 
**************************************************
La Segreteria ICRA
c/o Dipartimento di Fisica
Sapienza Università di Roma
P.le A. Moro, 5
I - 00185 ROMA, Italy
tel.: +39 06 4991 4 254
fax: +39 06 4454992
email:
segreteria@icra.it 


 
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