Cosmological Parameters from the BOSS Galaxy Power Spectrum
Marko Simonovic
Tue, Oct. 08th 2019, 16:00-17:00
Salle Claude Itzykson, Bât. 774, Orme des Merisiers

I will present cosmological parameter measurements from the publicly available Baryon Oscillation Spectroscopic Survey (BOSS) data on anisotropic galaxy clustering in Fourier space. Assuming a minimal $\Lambda$CDM cosmology with varied massive neutrinos, fixing the primordial power spectrum tilt, and imposing the big bang nucleosynthesis (BBN) prior on the physical baryon density $\omega_b$, the measured late-Universe parameters are: Hubble constant $H_0$ = 67.89 +/- 1.06 km/s/Mpc, matter density fraction $\Omega_m$ = 0.295 +/- 0.010, and the mass fluctuation amplitude $\sigma_8$ = 0.721 +/- 0.043. These parameters were measured directly from the BOSS data and independently of the Planck cosmic microwave background observations.

Contact : Filippo VERNIZZI


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