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BICEP/Keck XX: Component-separated maps of polarized CMB and thermal dust emission using Planck and BICEP/Keck Observations through the 2018 Observing Season

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Bibliographic Details
Main Authors:	Keck Collaboration, Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Thakur, R. Basu, Bischoff, C. A., Beck, D., Bock, J. J., Boenish, H., Buza, V., Cantrall, B., Cheshire IV, J. R., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A. J., Denison, E., Duband, L., Echter, M., Eiben, M., Elwood, B. D., Fatigoni, S., Filippini, J. P., Fortes, A., Gao, M., Giannakopoulos, C., Goeckner-Wald, N., Goldfinger, D. C., Gratton, S., Grayson, J. A., Greathouse, A., Grimes, P. K., Hall, G., Halal, G., Halpern, M., Hand, E., Harrison, S. A., Henderson, S., Hoang, T. D., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J. H., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C., Lasko, K., Lau, K. K., Lautzenhiser, M., Lennox, A., Liu, T., Mackey, S., Maher, N., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Nguyen, H. T., OBrient, R., Paine, S. N., Patel, A., Petroff, M. A., Polish, A. R., Prouve, T., Pryke, C., Reintsema, C. D., Richter, S., Romand, T., Salatino, M., Schillaci, A., Schmitt, B., Schwartz, R., Sheehy, C. D., Singari, B., Soliman, A., Germaine, T. St., Steiger, A., Steinbach, B., Sudiwala, R., Teply, G., Thompson, K. L., Tucker, C., Turner, A. D., Vergès, C., Vieregg, A. G., Wandui, A., Weber, A. C., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, H., Yu, C., Zheng, L., Zhang, C., Zhang, S.
Format:	Preprint
Published:	2025
Subjects:	Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
Online Access:	Acceder al recurso
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author	Keck Collaboration Ade, P. A. R. Ahmed, Z. Amiri, M. Barkats, D. Thakur, R. Basu Bischoff, C. A. Beck, D. Bock, J. J. Boenish, H. Buza, V. Cantrall, B. Cheshire IV, J. R. Connors, J. Cornelison, J. Crumrine, M. Cukierman, A. J. Denison, E. Duband, L. Echter, M. Eiben, M. Elwood, B. D. Fatigoni, S. Filippini, J. P. Fortes, A. Gao, M. Giannakopoulos, C. Goeckner-Wald, N. Goldfinger, D. C. Gratton, S. Grayson, J. A. Greathouse, A. Grimes, P. K. Hall, G. Halal, G. Halpern, M. Hand, E. Harrison, S. A. Henderson, S. Hoang, T. D. Hubmayr, J. Hui, H. Irwin, K. D. Kang, J. H. Karkare, K. S. Kefeli, S. Kovac, J. M. Kuo, C. Lasko, K. Lau, K. K. Lautzenhiser, M. Lennox, A. Liu, T. Mackey, S. Maher, N. Megerian, K. G. Minutolo, L. Moncelsi, L. Nakato, Y. Nguyen, H. T. OBrient, R. Paine, S. N. Patel, A. Petroff, M. A. Polish, A. R. Prouve, T. Pryke, C. Reintsema, C. D. Richter, S. Romand, T. Salatino, M. Schillaci, A. Schmitt, B. Schwartz, R. Sheehy, C. D. Singari, B. Soliman, A. Germaine, T. St. Steiger, A. Steinbach, B. Sudiwala, R. Teply, G. Thompson, K. L. Tucker, C. Turner, A. D. Vergès, C. Vieregg, A. G. Wandui, A. Weber, A. C. Willmert, J. Wong, C. L. Wu, W. L. K. Yang, H. Yu, C. Zheng, L. Zhang, C. Zhang, S.
author_facet	Keck Collaboration Ade, P. A. R. Ahmed, Z. Amiri, M. Barkats, D. Thakur, R. Basu Bischoff, C. A. Beck, D. Bock, J. J. Boenish, H. Buza, V. Cantrall, B. Cheshire IV, J. R. Connors, J. Cornelison, J. Crumrine, M. Cukierman, A. J. Denison, E. Duband, L. Echter, M. Eiben, M. Elwood, B. D. Fatigoni, S. Filippini, J. P. Fortes, A. Gao, M. Giannakopoulos, C. Goeckner-Wald, N. Goldfinger, D. C. Gratton, S. Grayson, J. A. Greathouse, A. Grimes, P. K. Hall, G. Halal, G. Halpern, M. Hand, E. Harrison, S. A. Henderson, S. Hoang, T. D. Hubmayr, J. Hui, H. Irwin, K. D. Kang, J. H. Karkare, K. S. Kefeli, S. Kovac, J. M. Kuo, C. Lasko, K. Lau, K. K. Lautzenhiser, M. Lennox, A. Liu, T. Mackey, S. Maher, N. Megerian, K. G. Minutolo, L. Moncelsi, L. Nakato, Y. Nguyen, H. T. OBrient, R. Paine, S. N. Patel, A. Petroff, M. A. Polish, A. R. Prouve, T. Pryke, C. Reintsema, C. D. Richter, S. Romand, T. Salatino, M. Schillaci, A. Schmitt, B. Schwartz, R. Sheehy, C. D. Singari, B. Soliman, A. Germaine, T. St. Steiger, A. Steinbach, B. Sudiwala, R. Teply, G. Thompson, K. L. Tucker, C. Turner, A. D. Vergès, C. Vieregg, A. G. Wandui, A. Weber, A. C. Willmert, J. Wong, C. L. Wu, W. L. K. Yang, H. Yu, C. Zheng, L. Zhang, C. Zhang, S.
contents	We present component-separated polarization maps of the cosmic microwave background (CMB) and Galactic thermal dust emission, derived using data from the BICEP/Keck experiments through the 2018 observing season and Planck. By employing a maximum-likelihood method that utilizes observing matrices, we produce unbiased maps of the CMB and dust signals. We outline the computational challenges and demonstrate an efficient implementation of the component map estimator. We show methods to compute and characterize power spectra of these maps, opening up an alternative way to infer the tensor-to-scalar ratio from our data. We compare the results of this map-based separation method with the baseline BICEP/Keck analysis. Our analysis demonstrates consistency between the two methods, finding an 84% correlation between the pipelines.
format	Preprint
id	arxiv_https___arxiv_org_abs_2509_21648
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	BICEP/Keck XX: Component-separated maps of polarized CMB and thermal dust emission using Planck and BICEP/Keck Observations through the 2018 Observing Season Keck Collaboration Ade, P. A. R. Ahmed, Z. Amiri, M. Barkats, D. Thakur, R. Basu Bischoff, C. A. Beck, D. Bock, J. J. Boenish, H. Buza, V. Cantrall, B. Cheshire IV, J. R. Connors, J. Cornelison, J. Crumrine, M. Cukierman, A. J. Denison, E. Duband, L. Echter, M. Eiben, M. Elwood, B. D. Fatigoni, S. Filippini, J. P. Fortes, A. Gao, M. Giannakopoulos, C. Goeckner-Wald, N. Goldfinger, D. C. Gratton, S. Grayson, J. A. Greathouse, A. Grimes, P. K. Hall, G. Halal, G. Halpern, M. Hand, E. Harrison, S. A. Henderson, S. Hoang, T. D. Hubmayr, J. Hui, H. Irwin, K. D. Kang, J. H. Karkare, K. S. Kefeli, S. Kovac, J. M. Kuo, C. Lasko, K. Lau, K. K. Lautzenhiser, M. Lennox, A. Liu, T. Mackey, S. Maher, N. Megerian, K. G. Minutolo, L. Moncelsi, L. Nakato, Y. Nguyen, H. T. OBrient, R. Paine, S. N. Patel, A. Petroff, M. A. Polish, A. R. Prouve, T. Pryke, C. Reintsema, C. D. Richter, S. Romand, T. Salatino, M. Schillaci, A. Schmitt, B. Schwartz, R. Sheehy, C. D. Singari, B. Soliman, A. Germaine, T. St. Steiger, A. Steinbach, B. Sudiwala, R. Teply, G. Thompson, K. L. Tucker, C. Turner, A. D. Vergès, C. Vieregg, A. G. Wandui, A. Weber, A. C. Willmert, J. Wong, C. L. Wu, W. L. K. Yang, H. Yu, C. Zheng, L. Zhang, C. Zhang, S. Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies We present component-separated polarization maps of the cosmic microwave background (CMB) and Galactic thermal dust emission, derived using data from the BICEP/Keck experiments through the 2018 observing season and Planck. By employing a maximum-likelihood method that utilizes observing matrices, we produce unbiased maps of the CMB and dust signals. We outline the computational challenges and demonstrate an efficient implementation of the component map estimator. We show methods to compute and characterize power spectra of these maps, opening up an alternative way to infer the tensor-to-scalar ratio from our data. We compare the results of this map-based separation method with the baseline BICEP/Keck analysis. Our analysis demonstrates consistency between the two methods, finding an 84% correlation between the pipelines.
title	BICEP/Keck XX: Component-separated maps of polarized CMB and thermal dust emission using Planck and BICEP/Keck Observations through the 2018 Observing Season
topic	Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
url	https://arxiv.org/abs/2509.21648