http://arxiv.org/abs/1906.10359
We consistently include the effect of massive neutrinos in the thermal Sunyaev Zeldovich (SZ) power spectrum and cluster counts analyses, highlighting subtle dependencies on the parameterisation and data combination. In $\Lambda$CDM, with an X-ray mass bias corresponding the expected hydrostatic mass bias, i.e., $b\simeq0.2$, our constraints from Planck SZ data are consistent with the latest results from SPT, DES-Y1 and KiDS+VIKING-450. In $\nu\Lambda$CDM, without prior information on $b$, our joint analyses of Planck SZ with Planck 2015 primary CMB yield a small improvement on the total neutrino mass bound compared to the Planck 2015 primary CMB constraint, as well as $(1-b)=0.64\pm0.04$~(68\%~CL). For forecasts, we find that a combination of a mock cosmic variance limited SZ power spectrum with primary CMB and BAO can improve the uncertainty on the total neutrino mass by 14\% with respect to CMB combined with BAO. This requires masking the heaviest clusters and probing the small-scale SZ power spectrum up to multipoles of $\ell_\mathrm{max}=10^4$. For a future competitive measurement of the total neutrino mass using CMB and the SZ power spectrum, but excluding BAO and lensing power spectrum, we find that a 1\% precision on the mass calibration is needed. Although SZ power spectrum-based measurements of the neutrino masses are challenging, we find that the SZ power spectrum can be used to tightly constrain intra-cluster medium properties.
B. Bolliet, T. Brinckmann, J. Chluba, et. al.
Wed, 26 Jun 19
54/68
Comments: N/A