Weighing neutrinos on the sky

主讲人 (Speaker): 

Francisco Villaescusa-Navarro

主讲人单位 (Speaker's Institute): 

Center for Computational Astrophysics

邀请人 (Invited by): 

王鑫

时间 (Time): 

星期二, 2019/04/16 - 15:00 to 16:00

地点 (Location): 

珠海校区海滨红楼17栋107 (Rm 107, Red House 17)

摘要 (Abstract): 

        I will briefly show how the observation of neutrino oscillations have pointed out that neutrinos have masses, showing the existence of physics beyond the standard model. Determining the neutrino masses and their hierarchy are among the most important goals of modern physics. In this talk, I will discuss how we can provide answers to these fundamental questions via cosmological observations. I will first present one of the predictions of the Big Bang theory: the existence of a cosmic neutrino background. I will then explain why cosmic neutrinos leave unique signatures on cosmological observables, and how we can use them to constrain the neutrino masses with a very high confidence level. Next, I will discuss the theoretical challenges we will need to surpass to extract the maximum cosmological and astrophysical information from upcoming surveys, and how we can use machine learning to tackle them.

主讲人简介 (Speaker's CV): 

Education:B.Sc. Physics 09/2002 - 07/2007 Valencia University, Spain Granted with Excellent prize;M.Sc. Physics 09/2007 - 07/2008 Valencia University, Spain;Ph.D. Physics 07/2008 - 05/2012 Valencia University, Spain Major Fields of Research:I am a computational cosmologist working on developing the theoretical framework needed to answer fundamental questions through data from cosmological surveys in the most precise way. Massive neutrinos cosmology；21cm cosmology；Numerical simulations；Information content；Large-scale structure；Galaxy clusters；Cosmic voids；Lyα-forest；Baryonic acoustic oscillations；Redshift-space distortions；Analytics methods；Modified Gravity；Weak lensing；Galaxy formation and evolution； Dark matter；Software development；Machine learning