Degree-scale cosmic microwave background polarization measurements from three years of bicep1 data
BICEP1 is a millimeter-wavelength telescope designed specifically to measure the inflationary B-mode polarization of the cosmic microwave background at degree angular scales. We present results from an analysis of the data acquired during three seasons of observations at the South Pole (2006-2008)....
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Online Access: | https://doi.org/10.1088/0004-637X/783/2/67 http://hdl.handle.net/10722/226709 |
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ftunivhongkonghu:oai:hub.hku.hk:10722/226709 2023-05-15T18:22:55+02:00 Degree-scale cosmic microwave background polarization measurements from three years of bicep1 data Rocha, G. Richter, S. Pryke, C. Ponthieu, N. Nguyen, H. T. Matsumura, T. Mason, P. V. Leitch, E. M. Kuo, C. L. Jones, W. C. Hristov, V. V. Holzapfel, W. L. Hivon, E. F. Filippini, J. Buder, I. Kovac, J. M. Duband, L. Dowell, C. D. Chiang, H. C. Bock, J. J. Bierman, E. M. Battle, J. O. Ade, P. A R Su, M. Aikin, R. Barkats, D. Bischoff, C. Kaufman, J. P. Keating, B. G. Yoon, K. W. Tolan, J. E. Takahashi, Y. D. Kernasovskiy, S. S. Sheehy, C. 2014 https://doi.org/10.1088/0004-637X/783/2/67 http://hdl.handle.net/10722/226709 eng eng Astrophysical Journal Astrophysical Journal, 2014, v. 783, n. 2 doi:10.1088/0004-637X/783/2/67 1538-4357 0004-637X 2 eid_2-s2.0-84896743194 http://hdl.handle.net/10722/226709 783 cosmic background radiation Article 2014 ftunivhongkonghu https://doi.org/10.1088/0004-637X/783/2/67 2023-01-14T16:13:20Z BICEP1 is a millimeter-wavelength telescope designed specifically to measure the inflationary B-mode polarization of the cosmic microwave background at degree angular scales. We present results from an analysis of the data acquired during three seasons of observations at the South Pole (2006-2008). This work extends the two-year result published in Chiang et al., with additional data from the third season and relaxed detector-selection criteria. This analysis also introduces a more comprehensive estimation of band power window functions, improved likelihood estimation methods, and a new technique for deprojecting monopole temperature-to-polarization leakage that reduces this class of systematic uncertainty to a negligible level. We present maps of temperature, E- and B-mode polarization, and their associated angular power spectra. The improvement in the map noise level and polarization spectra error bars are consistent with the 52% increase in integration time relative to Chiang et al. We confirm both self-consistency of the polarization data and consistency with the two-year results. We measure the angular power spectra at 21 ≤ ℓ ≤ 335 and find that the EE spectrum is consistent with Lambda cold dark matter cosmology, with the first acoustic peak of the EE spectrum now detected at 15σ. The BB spectrum remains consistent with zero. From B-modes only, we constrain the tensor-to-scalar ratio to , or r < 0.70 at 95% confidence level. © 2014. The American Astronomical Society. All rights reserved. Link_to_subscribed_fulltext Article in Journal/Newspaper South pole University of Hong Kong: HKU Scholars Hub Chiang ENVELOPE(162.650,162.650,-77.967,-77.967) Lambda ENVELOPE(-62.983,-62.983,-64.300,-64.300) South Pole The Astrophysical Journal 783 2 67 |
institution |
Open Polar |
collection |
University of Hong Kong: HKU Scholars Hub |
op_collection_id |
ftunivhongkonghu |
language |
English |
topic |
cosmic background radiation |
spellingShingle |
cosmic background radiation Rocha, G. Richter, S. Pryke, C. Ponthieu, N. Nguyen, H. T. Matsumura, T. Mason, P. V. Leitch, E. M. Kuo, C. L. Jones, W. C. Hristov, V. V. Holzapfel, W. L. Hivon, E. F. Filippini, J. Buder, I. Kovac, J. M. Duband, L. Dowell, C. D. Chiang, H. C. Bock, J. J. Bierman, E. M. Battle, J. O. Ade, P. A R Su, M. Aikin, R. Barkats, D. Bischoff, C. Kaufman, J. P. Keating, B. G. Yoon, K. W. Tolan, J. E. Takahashi, Y. D. Kernasovskiy, S. S. Sheehy, C. Degree-scale cosmic microwave background polarization measurements from three years of bicep1 data |
topic_facet |
cosmic background radiation |
description |
BICEP1 is a millimeter-wavelength telescope designed specifically to measure the inflationary B-mode polarization of the cosmic microwave background at degree angular scales. We present results from an analysis of the data acquired during three seasons of observations at the South Pole (2006-2008). This work extends the two-year result published in Chiang et al., with additional data from the third season and relaxed detector-selection criteria. This analysis also introduces a more comprehensive estimation of band power window functions, improved likelihood estimation methods, and a new technique for deprojecting monopole temperature-to-polarization leakage that reduces this class of systematic uncertainty to a negligible level. We present maps of temperature, E- and B-mode polarization, and their associated angular power spectra. The improvement in the map noise level and polarization spectra error bars are consistent with the 52% increase in integration time relative to Chiang et al. We confirm both self-consistency of the polarization data and consistency with the two-year results. We measure the angular power spectra at 21 ≤ ℓ ≤ 335 and find that the EE spectrum is consistent with Lambda cold dark matter cosmology, with the first acoustic peak of the EE spectrum now detected at 15σ. The BB spectrum remains consistent with zero. From B-modes only, we constrain the tensor-to-scalar ratio to , or r < 0.70 at 95% confidence level. © 2014. The American Astronomical Society. All rights reserved. Link_to_subscribed_fulltext |
format |
Article in Journal/Newspaper |
author |
Rocha, G. Richter, S. Pryke, C. Ponthieu, N. Nguyen, H. T. Matsumura, T. Mason, P. V. Leitch, E. M. Kuo, C. L. Jones, W. C. Hristov, V. V. Holzapfel, W. L. Hivon, E. F. Filippini, J. Buder, I. Kovac, J. M. Duband, L. Dowell, C. D. Chiang, H. C. Bock, J. J. Bierman, E. M. Battle, J. O. Ade, P. A R Su, M. Aikin, R. Barkats, D. Bischoff, C. Kaufman, J. P. Keating, B. G. Yoon, K. W. Tolan, J. E. Takahashi, Y. D. Kernasovskiy, S. S. Sheehy, C. |
author_facet |
Rocha, G. Richter, S. Pryke, C. Ponthieu, N. Nguyen, H. T. Matsumura, T. Mason, P. V. Leitch, E. M. Kuo, C. L. Jones, W. C. Hristov, V. V. Holzapfel, W. L. Hivon, E. F. Filippini, J. Buder, I. Kovac, J. M. Duband, L. Dowell, C. D. Chiang, H. C. Bock, J. J. Bierman, E. M. Battle, J. O. Ade, P. A R Su, M. Aikin, R. Barkats, D. Bischoff, C. Kaufman, J. P. Keating, B. G. Yoon, K. W. Tolan, J. E. Takahashi, Y. D. Kernasovskiy, S. S. Sheehy, C. |
author_sort |
Rocha, G. |
title |
Degree-scale cosmic microwave background polarization measurements from three years of bicep1 data |
title_short |
Degree-scale cosmic microwave background polarization measurements from three years of bicep1 data |
title_full |
Degree-scale cosmic microwave background polarization measurements from three years of bicep1 data |
title_fullStr |
Degree-scale cosmic microwave background polarization measurements from three years of bicep1 data |
title_full_unstemmed |
Degree-scale cosmic microwave background polarization measurements from three years of bicep1 data |
title_sort |
degree-scale cosmic microwave background polarization measurements from three years of bicep1 data |
publishDate |
2014 |
url |
https://doi.org/10.1088/0004-637X/783/2/67 http://hdl.handle.net/10722/226709 |
long_lat |
ENVELOPE(162.650,162.650,-77.967,-77.967) ENVELOPE(-62.983,-62.983,-64.300,-64.300) |
geographic |
Chiang Lambda South Pole |
geographic_facet |
Chiang Lambda South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
Astrophysical Journal Astrophysical Journal, 2014, v. 783, n. 2 doi:10.1088/0004-637X/783/2/67 1538-4357 0004-637X 2 eid_2-s2.0-84896743194 http://hdl.handle.net/10722/226709 783 |
op_doi |
https://doi.org/10.1088/0004-637X/783/2/67 |
container_title |
The Astrophysical Journal |
container_volume |
783 |
container_issue |
2 |
container_start_page |
67 |
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1766202328080187392 |