Speaker: Dr Eva-Maria Mueller
Title: SDSS: 20 years of cosmological results
Abstract: I will present the cosmological implications from the final cosmological measurements of clustering using galaxies, quasars, and Lyα forests from the completed Sloan Digital Sky Survey (SDSS) lineage of experiments in large-scale structure. These experiments, composed of data from SDSS, SDSS-II, BOSS, and eBOSS, offer independent measurements of baryon acoustic oscillation (BAO) measurements and redshift space distortions (RSD). This composite sample is the most constraining of its kind and allows us to perform a comprehensive assessment of the cosmological model after two decades of dedicated spectroscopic observation. Beyond dark energy and massive neutrinos, the large-scale clustering of our Universe can also be used to constrain models of Inflation through the measurement of primordial non-Gaussianities (PNG). In particular the eBOSS quasar sample is suitable for PNG studies because of its large survey volume and redshift range. I will present constraints on PNG from this sample through the measurement of the scale dependent halo bias.
My talk will focus on the results of Mueller et al. 2021 “The clustering of galaxies in the completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Primordial non-Gaussianity in Fourier Space (https://arxiv.org/abs/2106.13725)
as well as Alam et al. 2020 “The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory” (https://arxiv.org/abs/2007.08991).