Measurements of E-mode polarization and temperature-E-mode correlation in the cosmic microwave background from 100 square degrees of SPTpol data

Crites, A. T., Henning, J. W., Ade, P. A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Aird, K. A., Austermann, J. E., Beall, J. A., Bender, A. N., Benson, B. A., Bleem, L. E., Carlstrom, J. E., Chang, C. L., Chiang, H. C., Cho, H. -M., Citron, R., Crawford, T. M., de Haan, t., Dobbs, M. A., Everett, W., Gallicchio, J., Gao, J., George, E. M., Gilbert, A., Halverson, N. W., Hanson, D., Harrington, N., Hilton, G. C., Holder, G. P., Holzapfel, W. L., Hoover, S., Hou, Z., Hrubes, J. D., Nuang, N., Hubmayr, J., Irwin, K. D., Keisler, R., Knox, L., Lee, A. T., Leitch, E. M., Li, D., Liang, C., Luong-Van, D., McMahon, J. J., Mehl, J., Meyer, S. S., Mocanu, L., Montroy, T. E., Natoli, T., Nibarger, J. P., Novosad, V., Padin, S., Pryke, C., Reichardt, C. L., Ruhl, J. E., Saliwanchik, B. R., Sayre, J. T., Schaffer, K. K., Smecher, G., Stark, A. A., Story, K. T., Tucker, C. ORCID: https://orcid.org/0000-0002-1851-3918, Venderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V. and Zahn, O. 2015. Measurements of E-mode polarization and temperature-E-mode correlation in the cosmic microwave background from 100 square degrees of SPTpol data. Astrophysical Journal 805 (1) , 36. 10.1088/0004-637X/805/1/36

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Abstract

We present measurements of E-mode polarization and temperature-E-mode correlation in the cosmic microwave background using data from the first season of observations with SPTpol, the polarization-sensitive receiver currently installed on the South Pole Telescope (SPT). The observations used in this work cover 100 {{deg }²} of sky with arcminute resolution at 150 GHz. We report the E-mode angular auto-power spectrum (EE) and the temperature-E-mode angular cross-power spectrum (TE) over the multipole range 500 〈 ℓ ≤ 5000. These power spectra improve on previous measurements in the high-ℓ (small-scale) regime. We fit the combination of the SPTpol power spectra, data from Planck, and previous SPT measurements with a six-parameter ΛCDM cosmological model. We find that the best-fit parameters are consistent with previous results. The improvement in high-ℓ sensitivity over previous measurements leads to a significant improvement in the limit on polarized point-source power: after masking sources brighter than 50 mJy in unpolarized flux at 150 GHz, we find a 95% confidence upper limit on unclustered point-source power in the EE spectrum of {{D}_\ell}=\ell (\ell +1){{C}_\ell}/2π \lt 0.40 μ {{K}²} at \ell =3000, indicating that future EE measurements will not be limited by power from unclustered point sources in the multipole range \ell \lt 3600, and possibly much higher in \ell .

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Astronomical Society
ISSN:	0004-637X
Date of Acceptance:	22 February 2015
Last Modified:	10 May 2023 14:01
URI:	https://orca.cardiff.ac.uk/id/eprint/156751

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