English

Cross-correlating Planck CMB lensing with SDSS: Lensing-lensing and galaxy-lensing cross-correlations

Cosmology and Nongalactic Astrophysics 2016-11-15 v2

Abstract

We present results from cross-correlating Planck CMB lensing maps with the Sloan Digital Sky Survey (SDSS) galaxy lensing shape catalog and BOSS galaxy catalogs. For galaxy position vs. CMB lensing cross-correlations, we measure the convergence signal around the galaxies in configuration space, using the BOSS LOWZ (z0.30z\sim0.30) and CMASS (z0.57z\sim0.57) samples. With fixed Planck 2015 cosmology, doing a joint fit with the galaxy clustering measurement, for the LOWZ (CMASS) sample we find a galaxy bias bg=1.75±0.04b_g=1.75\pm0.04 (1.95±0.021.95\pm 0.02) and galaxy-matter cross-correlation coefficient rcc=1.0±0.2r_{cc}=1.0\pm0.2 (0.8±0.10.8\pm 0.1) using 20<rp<70h120<r_p<70h^{-1}Mpc, consistent with results from galaxy-galaxy lensing. Using the same scales and including the galaxy-galaxy lensing measurements, we constrain Ωm=0.284±0.024\Omega_m=0.284\pm0.024 and relative calibration bias between the CMB lensing and galaxy lensing to be bγ=0.820.14+0.15b_\gamma=0.82^{+0.15}_{-0.14}. The combination of galaxy lensing and CMB lensing also allows us to measure the cosmological distance ratios (with zl0.3z_l\sim0.3, zs0.5z_s\sim0.5) R=DsDl,DDl,s=2.68±0.29\mathcal R=\frac{D_s D_{l,*}}{D_* D_{l,s}}=2.68\pm0.29, consistent with predictions from the Planck 2015 cosmology (R=2.35\mathcal R=2.35). We detect the galaxy position-CMB convergence cross-correlation at small scales, rp<1h1r_p<1h^{-1}Mpc, and find consistency with lensing by NFW halos of mass Mh1013h1MM_h\sim10^{13}h^{-1}M_\odot. Finally, we measure the CMB lensing-galaxy shear cross-correlation, finding an amplitude of A=0.76±0.23A=0.76\pm0.23 (zeff=0.35z_\text{eff}=0.35, θ<2\theta<2^\circ) with respect to Planck 2015 Λ\LambdaCDM predictions (1σ1\sigma-level consistency). We do not find evidence for relative systematics between the CMB and SDSS galaxy lensing.

Keywords

Cite

@article{arxiv.1606.08841,
  title  = {Cross-correlating Planck CMB lensing with SDSS: Lensing-lensing and galaxy-lensing cross-correlations},
  author = {Sukhdeep Singh and Rachel Mandelbaum and Joel R. Brownstein},
  journal= {arXiv preprint arXiv:1606.08841},
  year   = {2016}
}

Comments

20 pages. Main results in figure 3 and figures 10-14. Accepted in MNRAS