Characterizing line-of-sight variability of polarized dust emission with future cmb experiments

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dc.contributor.authorBull, Philip
dc.contributor.authorMcBride, Lisa
dc.contributor.authorHensley, Brandon S
dc.date.accessioned2024-01-26T13:18:41Z
dc.date.available2024-01-26T13:18:41Z
dc.date.issued2023
dc.description.abstractWhile Galactic dust emission is often accounted for in cosmic microwave background (CMB) analyses by fitting a two-parameter modified blackbody (MBB) model in each pixel, typically a number of such clouds are found along each line of sight and within each angular pixel, resulting in a superposition of their spectra. We study the effects of this superposition on pixel-based foreground fitting strategies by modeling the spectral energy distribution (SED) in each pixel as the integral of individual MBB spectra over various physically motivated statistical distributions of dust cloud properties. We show that fitting these SEDs with the two-parameter MBB model generally results in unbiased estimates of the CMB Stokes Q and U amplitudes per pixel, unless there are significant changes in both the dust SED and polarization angle along the line of sight, in which case significant (>10σ) biases are observed in an illustrative model.en_US
dc.identifier.citationMcBride, L., Bull, P. and Hensley, B.S., 2023. Characterizing line-of-sight variability of polarized dust emission with future CMB experiments. Monthly Notices of the Royal Astronomical Society, 519(3), pp.4370-4383.en_US
dc.identifier.urihttp://dx.doi.org/10.1093/mnras/stac3754
dc.identifier.urihttp://hdl.handle.net/10566/9274
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.subjectCosmic background radiationen_US
dc.subjectDusten_US
dc.subjectExtinctionen_US
dc.subjectPolarizationen_US
dc.subjectspectral energy distributionen_US
dc.titleCharacterizing line-of-sight variability of polarized dust emission with future cmb experimentsen_US
dc.typeArticleen_US

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