Large-Scale Structure with 21cm Intensity MappingExport this event to calendar

Wednesday, October 31, 2018 — 11:30 AM EDT

Astronomy Lunch Series

photo of Andrej ObuljenAndrej Obuljen

Department of Physics & Astronomy
University of Waterloo

In this talk I will discuss several aspects of using the 21cm Intensity Mapping (IM) as a Large-Scale Structure (LSS) probe in order to better constrain the cosmological parameters. I will start with a Baryon Acoustic Oscillations (BAO) reconstruction method intended for 21cm IM observations at low redshifts. I will then present the predictions and gains of performing 21cm IM surveys at redshift range which is currently vastly unobserved (2<z<6). Finally I will show the results of using existing data (ALFALFA & SDSS) to place constraints on the distribution of neutral hydrogen (HI) in dark matter halos as a function of the halo mass. This is then used to constrain and improve the HI halo model needed to make accurate and precise predictions on the 21cm signal and the noise.​

Location 
PHY - Physics
308
200 University Avenue West

Waterloo, ON N2L 3G1
Canada
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