Work

Methods for CMB Map Analysis

Year: 2025

Type: article

Abstract: There are standard tools for analyzing cosmic microwave background maps. However, several important details are not usually highlighted. Here we describe best practices for several common map-modifying procedures, including masking, downgrading resolution, convolving with beam and pixel window functions, and adding white noise. We will explore how these modifications affect the final power spectrum measured from a map. We recommend the best ways to perform each of these procedures, describe when the different steps and measures should be carried out, and show the effects of incorrectly performing or applying any of them.

Source: Research Notes of the AAS

DOI: 10.3847/2515-5172/adb610

Authors: Raelyn M. Sullivan, Lukas Tobias Hergt, Douglas Scott

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Killam Trusts, Natural Sciences and Engineering Research Council of Canada

OpenAlex ID: W4407694278

FWCI: 2.712

Cites: 16

Cited by: 6

Related to: 10