http://arxiv.org/abs/1710.09770
We detect weak gravitational lensing of the cosmic microwave background (CMB) at the location of the WISExSCOS (WxS) galaxies using the publicly available Planck lensing convergence map. By stacking the lensing convergence map at the position of 12.4 million galaxies in the redshift range $0.1 \le z \le 0.345$, we find the average mass of the galaxies to be M${200{\rm crit}}$ = 8.6 $\pm$ 1.0 $\times 10^{12}\ M_{\odot}$. The null hypothesis of no-lensing is rejected at a significance of 14$\sigma$. We split the galaxy sample into three redshift slices each containing ~4.1 million objects and obtain lensing masses in each slice of 5.7 $\pm$ 1.5, 8.4 $\pm$ 1.7, and 13.5 $\pm$ 2 $\times 10^{12}\ M_{\odot}$. Our results suggest a redshift evolution in the galaxy sample masses but the apparent increase in the galaxy masses might also be due to Malmquist bias in the galaxy catalogue. We forecast that upcoming CMB surveys can achieve 5% galaxy mass constraints over sets of 12.4 million galaxies with M${200{\rm crit}}$ = $1 \times 10^{12}\ M_{\odot}$ at $z=1$.
S. Raghunathan, F. Bianchini and C. Reichardt
Fri, 27 Oct 17
19/60
Comments: 7 pages, 2 figures, 2 tables: Look forward to your comments