dc.date.accessioned | 2024-01-30T18:14:53Z | |
dc.date.available | 2024-01-30T18:14:53Z | |
dc.date.created | 2024-01-16T10:49:05Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | Eskilt, Johannes Røsok Watts, Duncan Aurvik, Ragnhild Basyrov, Artem Bersanelli, Marco Brilenkov, Maksym Colombo, L. P. L. Eriksen, Hans Kristian Kamfjord Fornazier, K.S.F. Franceschet, C. Fuskeland, Unni Galloway, Mathew Gjerløw, Eirik Hensley, B. Hergt, L.T. Herman, Daniel Christopher Ihle, Håvard Tveit Lee, Katherine Lunde, Jonas Gahr Sturtzel Nerval, S.K. Paradiso, S. Patel, S. K. Rahman, F. Regnier, M. San, Metin Sanyal, S. Stutzer, Nils-Ole Thommesen, Harald Verma, A. Wehus, Ingunn Kathrine Zhou, Y. . COSMOGLOBE DR1 results: II. Constraints on isotropic cosmic birefringence from reprocessed WMAP and Planck LFI data. Astronomy and Astrophysics (A & A). 2023, 679 | |
dc.identifier.uri | http://hdl.handle.net/10852/107289 | |
dc.description.abstract | Cosmic birefringence is a parity-violating effect that might have rotated the plane of the linearly polarized light of the cosmic microwave background (CMB) by an angle β since its emission. This angle has recently been measured to be nonzero at a statistical significance of 3.6 σ in the official Planck PR4 and 9-year WMAP data. In this work, we constrain β using the reprocessed B EYOND P LANCK LFI and C OSMOGLOBE DR1 WMAP polarization maps. These novel maps have both lower systematic residuals and a more complete error description than the corresponding official products. Foreground EB correlations could bias measurements of β , and while thermal dust EB emission has been argued to be statistically nonzero, no evidence for synchrotron EB power has been reported. Unlike the dust-dominated Planck HFI maps, the majority of the LFI and WMAP polarization maps are instead dominated by synchrotron emission. Simultaneously constraining β and the polarization miscalibration angle, α , of each channel, we find a best-fit value of β = 0.35° ±0.70° with LFI and WMAP data only. When including the Planck HFI PR4 maps, but fitting β separately for dust-dominated, β > 70 GHz , and synchrotron-dominated channels, β ≤70 GHz , we find β ≤70 GHz = 0.53° ±0.28°. This differs from zero with a statistical significance of 1.9 σ , and the main contribution to this value comes from the LFI 70 GHz channel. While the statistical significances of these results are low on their own, the measurement derived from the LFI and WMAP synchrotron-dominated maps agrees with the previously reported HFI-dominated constraints, despite the very different astrophysical and instrumental systematics involved in all these experiments. | |
dc.language | EN | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | COSMOGLOBE DR1 results: II. Constraints on isotropic cosmic birefringence from reprocessed WMAP and Planck LFI data | |
dc.title.alternative | ENEngelskEnglishCOSMOGLOBE DR1 results: II. Constraints on isotropic cosmic birefringence from reprocessed WMAP and Planck LFI data | |
dc.type | Journal article | |
dc.creator.author | Eskilt, Johannes Røsok | |
dc.creator.author | Watts, Duncan | |
dc.creator.author | Aurvik, Ragnhild | |
dc.creator.author | Basyrov, Artem | |
dc.creator.author | Bersanelli, Marco | |
dc.creator.author | Brilenkov, Maksym | |
dc.creator.author | Colombo, L. P. L. | |
dc.creator.author | Eriksen, Hans Kristian Kamfjord | |
dc.creator.author | Fornazier, K.S.F. | |
dc.creator.author | Franceschet, C. | |
dc.creator.author | Fuskeland, Unni | |
dc.creator.author | Galloway, Mathew | |
dc.creator.author | Gjerløw, Eirik | |
dc.creator.author | Hensley, B. | |
dc.creator.author | Hergt, L.T. | |
dc.creator.author | Herman, Daniel Christopher | |
dc.creator.author | Ihle, Håvard Tveit | |
dc.creator.author | Lee, Katherine | |
dc.creator.author | Lunde, Jonas Gahr Sturtzel | |
dc.creator.author | Nerval, S.K. | |
dc.creator.author | Paradiso, S. | |
dc.creator.author | Patel, S. K. | |
dc.creator.author | Rahman, F. | |
dc.creator.author | Regnier, M. | |
dc.creator.author | San, Metin | |
dc.creator.author | Sanyal, S. | |
dc.creator.author | Stutzer, Nils-Ole | |
dc.creator.author | Thommesen, Harald | |
dc.creator.author | Verma, A. | |
dc.creator.author | Wehus, Ingunn Kathrine | |
dc.creator.author | Zhou, Y. | |
cristin.unitcode | 185,15,3,0 | |
cristin.unitname | Institutt for teoretisk astrofysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 2227530 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy and Astrophysics (A & A)&rft.volume=679&rft.spage=&rft.date=2023 | |
dc.identifier.jtitle | Astronomy and Astrophysics (A & A) | |
dc.identifier.volume | 679 | |
dc.identifier.pagecount | 10 | |
dc.identifier.doi | https://doi.org/10.1051/0004-6361/202346829 | |
dc.subject.nvi | VDP::Astrofysikk, astronomi: 438 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0004-6361 | |
dc.type.version | PublishedVersion | |
cristin.articleid | A144 | |