We cross-correlate the positions of damped Lyman-$\alpha$ systems (DLAs) and
their parent quasar catalog with a convergence map derived from the Planck
cosmic microwave background (CMB) temperature data. We make consistent
detections of the lensing signal of both samples in both Fourier and
configuration space. By interpreting the excess signal present in the DLA
catalog with respect to the parent quasar catalog as caused by the large scale
structure traced by DLAs, we are able to infer the bias of these objects:
$b_DLA=2.6\pm0.9$. These results are consistent with previous
measurements made in cross-correlation with the Lyman-$\alpha$ forest, although
the current noise in the lensing data and the low number density of DLAs limits
the constraining power of this measurement. We discuss the robustness of the
analysis with respect to a number different systematic effects and forecast
prospects of carrying out this measurement with data from future experiments.
Description
[1712.02738] Bias of Damped Lyman-$\alpha$ systems from their cross-correlation with CMB lensing
%0 Generic
%1 alonso2017damped
%A Alonso, David
%A Colosimo, Joseph
%A Font-Ribera, Andreu
%A Slosar, Anže
%D 2017
%K CMB DLA bias
%T Bias of Damped Lyman-$\alpha$ systems from their cross-correlation with
CMB lensing
%U http://arxiv.org/abs/1712.02738
%X We cross-correlate the positions of damped Lyman-$\alpha$ systems (DLAs) and
their parent quasar catalog with a convergence map derived from the Planck
cosmic microwave background (CMB) temperature data. We make consistent
detections of the lensing signal of both samples in both Fourier and
configuration space. By interpreting the excess signal present in the DLA
catalog with respect to the parent quasar catalog as caused by the large scale
structure traced by DLAs, we are able to infer the bias of these objects:
$b_DLA=2.6\pm0.9$. These results are consistent with previous
measurements made in cross-correlation with the Lyman-$\alpha$ forest, although
the current noise in the lensing data and the low number density of DLAs limits
the constraining power of this measurement. We discuss the robustness of the
analysis with respect to a number different systematic effects and forecast
prospects of carrying out this measurement with data from future experiments.
@misc{alonso2017damped,
abstract = {We cross-correlate the positions of damped Lyman-$\alpha$ systems (DLAs) and
their parent quasar catalog with a convergence map derived from the Planck
cosmic microwave background (CMB) temperature data. We make consistent
detections of the lensing signal of both samples in both Fourier and
configuration space. By interpreting the excess signal present in the DLA
catalog with respect to the parent quasar catalog as caused by the large scale
structure traced by DLAs, we are able to infer the bias of these objects:
$b_{\rm DLA}=2.6\pm0.9$. These results are consistent with previous
measurements made in cross-correlation with the Lyman-$\alpha$ forest, although
the current noise in the lensing data and the low number density of DLAs limits
the constraining power of this measurement. We discuss the robustness of the
analysis with respect to a number different systematic effects and forecast
prospects of carrying out this measurement with data from future experiments.},
added-at = {2017-12-08T09:44:21.000+0100},
author = {Alonso, David and Colosimo, Joseph and Font-Ribera, Andreu and Slosar, Anže},
biburl = {https://www.bibsonomy.org/bibtex/2b3a282fa3571c5bae59bf4a21822ceb3/miki},
description = {[1712.02738] Bias of Damped Lyman-$\alpha$ systems from their cross-correlation with CMB lensing},
interhash = {d7e9427555057d423278914d85c693c9},
intrahash = {b3a282fa3571c5bae59bf4a21822ceb3},
keywords = {CMB DLA bias},
note = {cite arxiv:1712.02738Comment: 18 pages, 7 figures. Pipeline available at https://github.com/damonge/QxK},
timestamp = {2017-12-08T09:44:21.000+0100},
title = {Bias of Damped Lyman-$\alpha$ systems from their cross-correlation with
CMB lensing},
url = {http://arxiv.org/abs/1712.02738},
year = 2017
}