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CATEGORIES:Cosmology Lunch
SUMMARY:A 1.6 % CMB independent constraint on H0 - Matias
Zaldarriaga
DTSTART;TZID=Europe/London:20200624T160000
DTEND;TZID=Europe/London:20200624T170000
UID:TALK142543AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/142543
DESCRIPTION:I will present cosmological constraints from a joi
nt analysis of the pre- and post-reconstruction ga
laxy power spectrum multipoles from the final data
release of the Baryon Oscillation Spectroscopic S
urvey (BOSS) using the EFT of LSS.\nGeometric cons
traints are obtained from the positions of BAO pea
ks in reconstructed spectra\, which are analyzed i
n combination with the unreconstructed spectra in
a full-shape (FS) likelihood using a joint covaria
nce matrix. Assuming ΛCDM with massive neutrinos\
, we analyze clustering data from two redshift bin
s zeff=0.38\,0.61 and obtain 1.6% constraints on t
he Hubble constant H0\, using only a single prior
on the current baryon density ωb from Big Bang Nuc
leosynthesis (BBN) and no knowledge of the power s
pectrum slope ns. This gives H0 = 68.6±1.1 km s−1M
pc−1\, with the inclusion of BAO data sharpening t
he measurement by 40%\, representing one of the st
rongest current constraints on H0 independent of c
osmic microwave background data. Restricting to th
e best-fit slope ns from Planck (but without addit
ional priors on the spectral shape)\, we obtain a
1% H0 measurement of 67.8± 0.7 km s−1Mpc−1. I will
present the constraints on Early Dark Energy mode
ls that result from the combination of Planck and
our BOSS analysis.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Roo
m]
CONTACT:David Stefanyszyn
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