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  Cosmic birefringence from the Planck Data Release 4

Diego-Palazuelos, P., Eskilt, J. R., Minami, Y., Tristram, M., Sullivan, R. M., Banday, A. J., et al. (2022). Cosmic birefringence from the Planck Data Release 4. Physical Review Letters, 128(9): 091302. doi:10.1103/PhysRevLett.128.091302.

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Cosmic Birefringence from the Planck Data Release 4.pdf (Any fulltext), 436KB
 
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Diego-Palazuelos, P., Author
Eskilt, J. R., Author
Minami, Y., Author
Tristram, M., Author
Sullivan, R. M., Author
Banday, A. J., Author
Barreiro, R. B., Author
Eriksen, H. K., Author
Górski, K. M., Author
Keskitalo, R., Author
Komatsu, E.1, Author              
Martínez-González, E., Author
Scott, D., Author
Vielva, P., Author
Wehus, I. K., Author
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1Physical Cosmology, MPI for Astrophysics, Max Planck Society, ou_2205644              

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 Abstract: We search for the signature of parity-violating physics in the cosmic microwave background, called cosmic birefringence, using the Planck data release 4. We initially find a birefringence angle of β=0.30°±0.11° (68% C.L.) for nearly full-sky data. The values of β decrease as we enlarge the Galactic mask, which can be interpreted as the effect of polarized foreground emission. Two independent ways to model this effect are used to mitigate the systematic impact on β for different sky fractions. We choose not to assign cosmological significance to the measured value of β until we improve our knowledge of the foreground polarization.

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 Dates: 2022-03-01
 Publication Status: Published online
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 Identifiers: DOI: 10.1103/PhysRevLett.128.091302
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 128 (9) Sequence Number: 091302 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1