| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
28 March 2024 |
|
| | | |
|
Article overview
| |
|
Cross-correlating Planck CMB lensing with SDSS: Lensing-lensing and galaxy-lensing cross-correlations | Sukhdeep Singh
; Rachel Mandelbaum
; Joel R. Brownstein
; | Date: |
28 Jun 2016 | Abstract: | We present first 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 ($zsim0.30$) and CMASS ($zsim0.57$) 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
$b_g=1.75pm0.04$ ($1.95pm 0.02$) and galaxy-matter cross-correlation
coefficient $r_{cc}=1.0pm0.2$ ($0.8pm 0.1$) using $20<r_p<70$ Mpc/h,
consistent with results from galaxy-galaxy lensing. Using the same scales and
including the galaxy-galaxy lensing measurements, we constrain
$Omega_m=0.284pm0.024$ and relative calibration bias between the CMB lensing
and galaxy lensing to be $b_gamma=0.82^{+0.15}_{-0.14}$. The combination of
galaxy lensing and CMB lensing also allows us to measure the cosmological
distance ratios (with $z_lsim0.3$, $z_ssim0.5$) $mathcal R=frac{D_s
D_{l,*}}{D_* D_{l,s}}=2.68pm0.29$, consistent with predictions from the Planck
2015 cosmology ($mathcal R=2.35$). We detect the galaxy position-CMB
convergence cross-correlation at small scales, $r_p<1$ Mpc/h, and find
consistency with lensing by NFW halos of mass
$M_hsim10^{13}$$h^{-1}M_{odot}$. Finally, we measure the CMB lensing-galaxy
shear cross-correlation, finding an amplitude of $A=0.76pm0.23$
($z_ ext{eff}=0.35$, $ heta<2^circ$) with respect to Planck 2015
$Lambda$CDM predictions ($1sigma$-level consistency). We do not find evidence
for relative systematics between the CMB and SDSS galaxy lensing. | Source: | arXiv, 1606.8841 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |