Astro Seminar Series - VIA ZOOM

Wednesday, July 7, 2021 2:00 pm - 2:00 pm EDT (GMT -04:00)

Anže Slosar graduated from Cambridge, followed by postdocs in Ljubljana (Slovenia), Oxford and Berkeley before moving to a staff Scientist position

Anze_Slosar photo
at Brookhaven National Laboratory. He is a group leader for Cosmology & Astrophysics Group. He is interested in all experimental probes of cosmology and has worked on numerous topics including Lyman-alpha forest, galaxy clustering, primordial non-Gaussianity and recently on analysis of photometric galaxy surveys.

Talk Title and Abstract:

21cm in the 21st century

Universe is full of neutral hydrogen shining in the 21-cm spin-flip transition. Using this line to trace cosmic structure allows us to map the large scale structure in three dimensions very efficiently.  In practice, this technique has proven to be devilishly difficult. I will argue that it nevertheless offers the most promising way to complete the programmatic goal of measuring the linear scales of the universe deep into the pre-acceleration era after the current crop of optical experiments complete observing. It will measure expansion history and cosmic growth measurements to redshift z=6, characterize inflation throught primordial non-Gaussianity and relic features in the primordial power spectrum, add several new high-redshift screens to study weak gravitational lensing and perhaps even allow direct measurements of the real-time expansion of the universe. I will discuss PUMA, an ambitious 21cm intensity mapping proposal and discuss the scientific, technological and programmatic issues that we need overcome to make it become real.

Would you like to join this Zoom seminar?  Please email Donna Hayes.