A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope
Clusters of galaxies are expected to gravitationally lens the cosmic microwave background (CMB) and thereby generate a distinct signal in the CMB on arcminute scales. Measurements of this effect can be used to constrain the masses of galaxy clusters with CMB data alone. Here we present a measurement...
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American Astronomical Society
2015
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ftcaltechauth:oai:authors.library.caltech.edu:59196 2023-05-15T18:22:04+02:00 A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope Baxter, E. J. Crites, A. T. Lueker, M. Padin, S. Williamson, R. 2015-06-20 application/pdf https://authors.library.caltech.edu/59196/ https://authors.library.caltech.edu/59196/1/0004-637X_806_2_247.pdf https://authors.library.caltech.edu/59196/2/1412.7521v2.pdf https://resolver.caltech.edu/CaltechAUTHORS:20150805-080846949 en eng American Astronomical Society https://authors.library.caltech.edu/59196/1/0004-637X_806_2_247.pdf https://authors.library.caltech.edu/59196/2/1412.7521v2.pdf Baxter, E. J. and Crites, A. T. and Lueker, M. and Padin, S. and Williamson, R. (2015) A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope. Astrophysical Journal, 806 (2). Art. No. 247. ISSN 0004-637X. doi:10.1088/0004-637X/806/2/247. https://resolver.caltech.edu/CaltechAUTHORS:20150805-080846949 <https://resolver.caltech.edu/CaltechAUTHORS:20150805-080846949> other Article PeerReviewed 2015 ftcaltechauth https://doi.org/10.1088/0004-637X/806/2/247 2021-11-11T19:05:16Z Clusters of galaxies are expected to gravitationally lens the cosmic microwave background (CMB) and thereby generate a distinct signal in the CMB on arcminute scales. Measurements of this effect can be used to constrain the masses of galaxy clusters with CMB data alone. Here we present a measurement of lensing of the CMB by galaxy clusters using data from the South Pole Telescope (SPT). We develop a maximum likelihood approach to extract the CMB cluster lensing signal and validate the method on mock data. We quantify the effects on our analysis of several potential sources of systematic error and find that they generally act to reduce the best-fit cluster mass. It is estimated that this bias to lower cluster mass is roughly 0.85σ in units of the statistical error bar, although this estimate should be viewed as an upper limit. We apply our maximum likelihood technique to 513 clusters selected via their Sunyaev–Zeldovich (SZ) signatures in SPT data, and rule out the null hypothesis of no lensing at 3.1σ. The lensing-derived mass estimate for the full cluster sample is consistent with that inferred from the SZ flux: M_(200,lens)=0.83_(-0.37)^(+0.38)M_(200,SZ) (68% C.L., statistical error only). Article in Journal/Newspaper South pole Caltech Authors (California Institute of Technology) South Pole The Astrophysical Journal 806 2 247 |
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Caltech Authors (California Institute of Technology) |
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ftcaltechauth |
language |
English |
description |
Clusters of galaxies are expected to gravitationally lens the cosmic microwave background (CMB) and thereby generate a distinct signal in the CMB on arcminute scales. Measurements of this effect can be used to constrain the masses of galaxy clusters with CMB data alone. Here we present a measurement of lensing of the CMB by galaxy clusters using data from the South Pole Telescope (SPT). We develop a maximum likelihood approach to extract the CMB cluster lensing signal and validate the method on mock data. We quantify the effects on our analysis of several potential sources of systematic error and find that they generally act to reduce the best-fit cluster mass. It is estimated that this bias to lower cluster mass is roughly 0.85σ in units of the statistical error bar, although this estimate should be viewed as an upper limit. We apply our maximum likelihood technique to 513 clusters selected via their Sunyaev–Zeldovich (SZ) signatures in SPT data, and rule out the null hypothesis of no lensing at 3.1σ. The lensing-derived mass estimate for the full cluster sample is consistent with that inferred from the SZ flux: M_(200,lens)=0.83_(-0.37)^(+0.38)M_(200,SZ) (68% C.L., statistical error only). |
format |
Article in Journal/Newspaper |
author |
Baxter, E. J. Crites, A. T. Lueker, M. Padin, S. Williamson, R. |
spellingShingle |
Baxter, E. J. Crites, A. T. Lueker, M. Padin, S. Williamson, R. A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope |
author_facet |
Baxter, E. J. Crites, A. T. Lueker, M. Padin, S. Williamson, R. |
author_sort |
Baxter, E. J. |
title |
A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope |
title_short |
A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope |
title_full |
A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope |
title_fullStr |
A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope |
title_full_unstemmed |
A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope |
title_sort |
measurement of gravitational lensing of the cosmic microwave background by galaxy clusters using data from the south pole telescope |
publisher |
American Astronomical Society |
publishDate |
2015 |
url |
https://authors.library.caltech.edu/59196/ https://authors.library.caltech.edu/59196/1/0004-637X_806_2_247.pdf https://authors.library.caltech.edu/59196/2/1412.7521v2.pdf https://resolver.caltech.edu/CaltechAUTHORS:20150805-080846949 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://authors.library.caltech.edu/59196/1/0004-637X_806_2_247.pdf https://authors.library.caltech.edu/59196/2/1412.7521v2.pdf Baxter, E. J. and Crites, A. T. and Lueker, M. and Padin, S. and Williamson, R. (2015) A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope. Astrophysical Journal, 806 (2). Art. No. 247. ISSN 0004-637X. doi:10.1088/0004-637X/806/2/247. https://resolver.caltech.edu/CaltechAUTHORS:20150805-080846949 <https://resolver.caltech.edu/CaltechAUTHORS:20150805-080846949> |
op_rights |
other |
op_doi |
https://doi.org/10.1088/0004-637X/806/2/247 |
container_title |
The Astrophysical Journal |
container_volume |
806 |
container_issue |
2 |
container_start_page |
247 |
_version_ |
1766201418899783680 |