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A constraint on primordial B-modes from the first flight of the spider balloon-borne telescope

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Title: A constraint on primordial B-modes from the first flight of the spider balloon-borne telescope
Authors: Collaboration, SPIDER
Ade, PAR
Amiri, M
Benton, SJ
Bergman, AS
Bihary, R
Bock, JJ
Bond, JR
Bonetti, JA
Bryan, SA
Chiang, HC
Contaldi, CR
Doré, O
Duivenvoorden, AJ
Eriksen, HK
Farhang, M
Filippini, JP
Fraisse, AA
Freese, K
Galloway, M
Gambrel, AE
Gandilo, NN
Ganga, K
Gualtieri, R
Gudmundsson, JE
Halpern, M
Hartley, J
Hasselfield, M
Hilton, G
Holmes, W
Hristov, VV
Huang, Z
Irwin, KD
Jones, WC
Karakci, A
Kuo, CL
Kermish, ZD
Leung, JS-Y
Li, S
Mak, DSY
Mason, PV
Megerian, K
Moncelsi, L
Morford, TA
Nagy, JM
Netterfield, CB
Nolta, M
O'Brient, R
Osherson, B
Padilla, IL
Racine, B
Rahlin, AS
Reintsema, C
Ruhl, JE
Runyan, MC
Ruud, TM
Shariff, JA
Shaw, EC
Shiu, C
Soler, JD
Song, X
Trangsrud, A
Tucker, C
Tucker, RS
Turner, AD
List, JFVD
Weber, AC
Wehus, IK
Wen, S
Wiebe, DV
Young, EY
Item Type: Journal Article
Abstract: We present the first linear polarization measurements from the 2015 long-duration balloon flight of SPIDER, an experiment designed to map the polarization of the cosmic microwave background (CMB) on degree angular scales. Results from these measurements include maps and angular power spectra from observations of 4.8% of the sky at 95 and 150 GHz, along with the results of internal consistency tests on these data. While the polarized CMB anisotropy from primordial density perturbations is the dominant signal in this region of sky, Galactic dust emission is also detected with high significance; Galactic synchrotron emission is found to be negligible in the SPIDER bands. We employ two independent foreground-removal techniques in order to explore the sensitivity of the cosmological result to the assumptions made by each. The primary method uses a dust template derived from Planck data to subtract the Galactic dust signal. A second approach, employing a joint analysis of SPIDER and Planck data in the harmonic domain, assumes a modified-blackbody model for the spectral energy distribution of the dust with no constraint on its spatial morphology. Using a likelihood that jointly samples the template amplitude and $r$ parameter space, we derive 95% upper limits on the primordial tensor-to-scalar ratio from Feldman-Cousins and Bayesian constructions, finding $r<0.11$ and $r<0.19$, respectively. Roughly half the uncertainty in $r$ derives from noise associated with the template subtraction. New data at 280 GHz from SPIDER's second flight will complement the Planck polarization maps, providing powerful measurements of the polarized Galactic dust emission.
Issue Date: 14-Mar-2022
Date of Acceptance: 15-Aug-2021
URI: http://hdl.handle.net/10044/1/99035
DOI: 10.3847/1538-4357/ac20df
ISSN: 0004-637X
Publisher: American Astronomical Society
Start Page: 1
End Page: 26
Journal / Book Title: The Astrophysical Journal: an international review of astronomy and astronomical physics
Volume: 927
Issue: 2
Copyright Statement: © 2022. The American Astronomical Society. All rights reserved. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/P000762/1
ST/S000372/1
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
MICROWAVE BACKGROUND DATA
ANGULAR POWER SPECTRUM
CIRCULAR-POLARIZATION
LIKELIHOOD ESTIMATOR
STATISTICAL-ANALYSIS
ANISOTROPY
DESIGN
POLARIMETRY
BOLOMETERS
TRANSITION
astro-ph.CO
astro-ph.CO
astro-ph.CO
astro-ph.CO
0201 Astronomical and Space Sciences
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0306 Physical Chemistry (incl. Structural)
Astronomy & Astrophysics
Notes: 29 pages, 13 figures
Publication Status: Published
Online Publication Date: 2022-03-14
Appears in Collections:Theoretical Physics



This item is licensed under a Creative Commons License Creative Commons