PIRSA:18110083

Large-Scale Structure with 21cm Intensity Mapping

Obuljen, A. (2018). Large-Scale Structure with 21cm Intensity Mapping. Perimeter Institute. https://pirsa.org/18110083

Obuljen, Andrej. Large-Scale Structure with 21cm Intensity Mapping. Perimeter Institute, Nov. 13, 2018, https://pirsa.org/18110083 

          @misc{ pirsa_PIRSA:18110083,
            doi = {10.48660/18110083},
            url = {https://pirsa.org/18110083},
            author = {Obuljen, Andrej},
            keywords = {Cosmology},
            language = {en},
            title = {Large-Scale Structure with 21cm Intensity Mapping},
            publisher = {Perimeter Institute},
            year = {2018},
            month = {nov},
            note = {PIRSA:18110083 see, \url{https://pirsa.org}}
          }

Andrej Obuljen

University of Zurich

Talk number
PIRSA:18110083
Collection
Talk Type
Subject
Abstract

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.