CLASS Angular Power Spectra and Map-component Analysis for 40 GHz Observations through 2022

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dc.contributor.authorEimer, Joseph R.
dc.contributor.authorLi, Yuyang
dc.contributor.authorBrewer, Michael K.
dc.contributor.authorShi, Rui
dc.contributor.authorAli, Aamir
dc.contributor.authorAppel, John W.
dc.contributor.authorBennett, Charles L.
dc.contributor.authorBruno, Sarah Marie
dc.contributor.authorBustos, Ricardo
dc.contributor.authorChuss, David T.
dc.contributor.authorCleary, Joseph
dc.contributor.authorDahal, Sumit
dc.contributor.authorDatta, Rahul
dc.contributor.authorDenes Couto, Jullianna
dc.contributor.authorDenis, Kevin L.
dc.contributor.authorDunner, Rolando
dc.contributor.authorEssinger-Hileman, Thomas
dc.contributor.authorFluxa, Pedro
dc.contributor.authorHubmayer, Johannes
dc.contributor.authorHarrington, Kathleen
dc.contributor.authorIuliano, Jeffrey
dc.contributor.authorKarakla, John
dc.contributor.authorMarriage, Tobias A.
dc.contributor.authorNunez, Carolina
dc.contributor.authorParker, Lucas
dc.contributor.authorPetroff, Matthew A.
dc.contributor.authorReeves, Rodrigo A.
dc.contributor.authorRostem, Karwan
dc.contributor.authorValle, Deniz A. N.
dc.contributor.authorWatts, Duncan J.
dc.contributor.authorWeiland, Janet L.
dc.contributor.authorWollack, Edward J.
dc.contributor.authorXu, Zhilei
dc.contributor.authorZeng, Lingzhen
dc.date.accessioned2025-01-20T17:07:18Z
dc.date.available2025-01-20T17:07:18Z
dc.date.issued2024
dc.description.abstractMeasurement of the largest angular scale (l < 30) features of the cosmic microwave background (CMB) polarization is a powerful way to constrain the optical depth to reionization and search for the signature of inflation through the detection of primordial B-modes. We present an analysis of maps covering 73.6% of the sky made from the 40 GHz channel of the Cosmology Large Angular Scale Surveyor (CLASS) from 2016 August to 2022 May. Taking advantage of the measurement stability enabled by front-end polarization modulation and excellent conditions from the Atacama Desert, we show this channel achieves higher sensitivity than the analogous frequencies from satellite measurements in the range 10 < l < 100. Simulations show the CLASS linear (circular) polarization maps have a white noise level of 125(130)mu Karcmin . We measure the Galaxy-masked EE and BB spectra of diffuse synchrotron radiation and compare to space-based measurements at similar frequencies. In combination with external data, we expand measurements of the spatial variations of the synchrotron spectral energy density (SED) to include new sky regions and measure the diffuse SED in the harmonic domain. We place a new upper limit on a background of circular polarization in the range 5 < l < 125 with the first bin showing D- l < 0.023 mu K-CMB(2) at 95% confidence. These results establish a new standard for recovery of the largest-scale CMB polarization from the ground and signal exciting possibilities when the higher sensitivity and higher-frequency CLASS channels are included in the analysis.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ad1abf
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ad1abf
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90852
dc.identifier.wosidWOS:001179683400001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleCLASS Angular Power Spectra and Map-component Analysis for 40 GHz Observations through 2022
dc.typeartículo
dc.volumen963
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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