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Astro2020 APC White Paper: The need for better tools to design future CMB experiments

Rocha, Graça and Banday, A. J. and Barreiro, R. and Challinor, A. and Górski, K. M. and Hensley, B. and Jaffe, T. and Jewell, J. and Keating, B. and Kogut, A. and Lawrence, C. and Panopoulou, Georgia and Partridge, B. and Pearson, Tim and Silk, J. and Steinhardt, P. and Whehus, I. and Bock, Jamie and Crill, Brendan and Delabrouille, J. and Doré, Olivier and Fernandez-Cobos, R. and Ijjas, A. and Keskitalo, R. and Kritsuk, A. and Mangilli, A. and Moncelsi, Lorenzo and Myers, S. and Steinbach, Bryan and Tristram, M. (2019) Astro2020 APC White Paper: The need for better tools to design future CMB experiments. Astro2020 Science White Paper, . (Unpublished)

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This white paper addresses key challenges for the design of next-decade Cosmic Microwave Background (CMB) experiments, and for assessing their capability to extract cosmological information from CMB polarization. We focus here on the challenges posed by foreground emission, CMB lensing, and instrumental systematics to detect the signal that arises from gravitational waves sourced by inflation and parameterized by r, at the level of r∼10^(−3) or lower, as proposed for future observational efforts. We argue that more accurate and robust analysis and simulation tools are required for these experiments to realize their promise. We are optimistic that the capability to simulate the joint impact of foregrounds, CMB lensing, and systematics can be developed to the level necessary to support the design of a space mission at r∼10^(−4) in a few years. We make the case here for supporting such work. Although ground-based efforts present additional challenges (e.g., atmosphere, ground pickup), which are not addressed here, they would also benefit from these improved simulation capabilities.

Item Type:Report or Paper (White Paper)
Related URLs:
URLURL TypeDescription Paper
Rocha, Graça0000-0002-4150-8076
Barreiro, R.0000-0002-6139-4272
Panopoulou, Georgia0000-0001-7482-5759
Pearson, Tim0000-0001-5213-6231
Bock, Jamie0000-0002-5710-5212
Crill, Brendan0000-0002-4650-8518
Doré, Olivier0000-0001-7432-2932
Moncelsi, Lorenzo0000-0002-4242-3015
Additional Information:The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.
Group:Astronomy Department
Funding AgencyGrant Number
Series Name:Astro2020 Science White Paper
Record Number:CaltechAUTHORS:20190925-085849774
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98841
Deposited By: Tony Diaz
Deposited On:25 Sep 2019 17:44
Last Modified:02 Jun 2023 00:58

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