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A measurement of the degree-scale CMB B-mode angular power spectrum with POLARBEAR
journal contribution
posted on 2023-06-20, 14:15 authored by S Adachi, M A O Aguilar Faúndez, K Arnold, C Baccigalupi, D Barron, D Beck, S Beckman, F Bianchini, D Boettger, J Borrill, Julien Carron, S Chapman, K Cheung, Y Chinone, Giulio Fabbian, The POLARBEAR Collaboration, othersWe present a measurement of the B-mode polarization power spectrum of the cosmic microwave background (CMB) using data taken from 2014 July to 2016 December with the Polarbear experiment. The CMB power spectra are measured using observations at 150 GHz with an instantaneous array sensitivity of NETarray=23µ Kvs on a 670 square degree patch of sky centered at (R.A., decl.) = (+0h12m0s, -59°18'). A continuously rotating half-wave plate is used to modulate polarization and to suppress low-frequency noise. We achieve 32 µK arcmin effective polarization map noise with a knee in sensitivity of l = 90, where the inflationary gravitational-wave signal is expected to peak. The measured B-mode power spectrum is consistent with a ?CDM lensing and single dust component foreground model over a range of multipoles 50 = l = 600. The data disfavor zero ClBB at 2.2s using this l range of Polarbear data alone. We cross-correlate our data with Planck full mission 143, 217, and 353 GHz frequency maps and find the low-l B-mode power in the combined data set to be consistent with thermal dust emission. We place an upper limit on the tensor-to-scalar ratio r < 0.90 at the 95% confidence level after marginalizing over foregrounds.
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- Published
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- Published version
Journal
Astrophysical JournalISSN
0004-637XPublisher
IOP PublishingExternal DOI
Issue
1Volume
897Page range
1-23Article number
a55Department affiliated with
- Physics and Astronomy Publications
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Peer reviewed?
- Yes
Legacy Posted Date
2021-01-08First Compliant Deposit (FCD) Date
2020-12-29Usage metrics
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