Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope
We describe a method for measuring the integrated Comptonization (Y_(SZ)) of clusters of galaxies from measurements of the Sunyaev-Zel'dovich (SZ) effect in multiple frequency bands and use this method to characterize a sample of galaxy clusters detected in the South Pole Telescope (SPT) data....
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American Astronomical Society
2015
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ftcaltechauth:oai:authors.library.caltech.edu:55607 2023-05-15T18:22:14+02:00 Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope Saliwanchik, B. R. Lueker, M. Padin, S. Shirokoff, E. Vieira, J. D. 2015-02-01 application/pdf https://authors.library.caltech.edu/55607/ https://authors.library.caltech.edu/55607/1/0004-637X_799_2_137.pdf https://authors.library.caltech.edu/55607/2/1312.3015v1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20150306-132050855 en eng American Astronomical Society https://authors.library.caltech.edu/55607/1/0004-637X_799_2_137.pdf https://authors.library.caltech.edu/55607/2/1312.3015v1.pdf Saliwanchik, B. R. and Lueker, M. and Padin, S. and Shirokoff, E. and Vieira, J. D. (2015) Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope. Astrophysical Journal, 799 (2). Art. No. 137. ISSN 0004-637X. doi:10.1088/0004-637X/799/2/137. https://resolver.caltech.edu/CaltechAUTHORS:20150306-132050855 <https://resolver.caltech.edu/CaltechAUTHORS:20150306-132050855> other Article PeerReviewed 2015 ftcaltechauth https://doi.org/10.1088/0004-637X/799/2/137 2021-11-11T19:03:12Z We describe a method for measuring the integrated Comptonization (Y_(SZ)) of clusters of galaxies from measurements of the Sunyaev-Zel'dovich (SZ) effect in multiple frequency bands and use this method to characterize a sample of galaxy clusters detected in the South Pole Telescope (SPT) data. We use a Markov Chain Monte Carlo method to fit a β-model source profile and integrate Y_(SZ) within an angular aperture on the sky. In simulated observations of an SPT-like survey that include cosmic microwave background anisotropy, point sources, and atmospheric and instrumental noise at typical SPT-SZ survey levels, we show that we can accurately recover β-model parameters for inputted clusters. We measure Y_(SZ) for simulated semi-analytic clusters and find that Y_(SZ) is most accurately determined in an angular aperture comparable to the SPT beam size. We demonstrate the utility of this method to measure Y_(SZ) and to constrain mass scaling relations using X-ray mass estimates for a sample of 18 galaxy clusters from the SPT-SZ survey. Measuring Y_(SZ) within a 0.'75 radius aperture, we find an intrinsic log-normal scatter of 21% ± 11% in Y_(SZ) at a fixed mass. Measuring Y_(SZ) within a 0.3 Mpc projected radius (equivalent to 0.'75 at the survey median redshift z = 0.6), we find a scatter of 26% ± 9%. Prior to this study, the SPT observable found to have the lowest scatter with mass was cluster detection significance. We demonstrate, from both simulations and SPT observed clusters that Y_(SZ) measured within an aperture comparable to the SPT beam size is equivalent, in terms of scatter with cluster mass, to SPT cluster detection significance. Article in Journal/Newspaper South pole Caltech Authors (California Institute of Technology) South Pole The Astrophysical Journal 799 2 137 |
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Caltech Authors (California Institute of Technology) |
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ftcaltechauth |
language |
English |
description |
We describe a method for measuring the integrated Comptonization (Y_(SZ)) of clusters of galaxies from measurements of the Sunyaev-Zel'dovich (SZ) effect in multiple frequency bands and use this method to characterize a sample of galaxy clusters detected in the South Pole Telescope (SPT) data. We use a Markov Chain Monte Carlo method to fit a β-model source profile and integrate Y_(SZ) within an angular aperture on the sky. In simulated observations of an SPT-like survey that include cosmic microwave background anisotropy, point sources, and atmospheric and instrumental noise at typical SPT-SZ survey levels, we show that we can accurately recover β-model parameters for inputted clusters. We measure Y_(SZ) for simulated semi-analytic clusters and find that Y_(SZ) is most accurately determined in an angular aperture comparable to the SPT beam size. We demonstrate the utility of this method to measure Y_(SZ) and to constrain mass scaling relations using X-ray mass estimates for a sample of 18 galaxy clusters from the SPT-SZ survey. Measuring Y_(SZ) within a 0.'75 radius aperture, we find an intrinsic log-normal scatter of 21% ± 11% in Y_(SZ) at a fixed mass. Measuring Y_(SZ) within a 0.3 Mpc projected radius (equivalent to 0.'75 at the survey median redshift z = 0.6), we find a scatter of 26% ± 9%. Prior to this study, the SPT observable found to have the lowest scatter with mass was cluster detection significance. We demonstrate, from both simulations and SPT observed clusters that Y_(SZ) measured within an aperture comparable to the SPT beam size is equivalent, in terms of scatter with cluster mass, to SPT cluster detection significance. |
format |
Article in Journal/Newspaper |
author |
Saliwanchik, B. R. Lueker, M. Padin, S. Shirokoff, E. Vieira, J. D. |
spellingShingle |
Saliwanchik, B. R. Lueker, M. Padin, S. Shirokoff, E. Vieira, J. D. Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope |
author_facet |
Saliwanchik, B. R. Lueker, M. Padin, S. Shirokoff, E. Vieira, J. D. |
author_sort |
Saliwanchik, B. R. |
title |
Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope |
title_short |
Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope |
title_full |
Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope |
title_fullStr |
Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope |
title_full_unstemmed |
Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope |
title_sort |
measurement of galaxy cluster integrated comptonization and mass scaling relations with the south pole telescope |
publisher |
American Astronomical Society |
publishDate |
2015 |
url |
https://authors.library.caltech.edu/55607/ https://authors.library.caltech.edu/55607/1/0004-637X_799_2_137.pdf https://authors.library.caltech.edu/55607/2/1312.3015v1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20150306-132050855 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://authors.library.caltech.edu/55607/1/0004-637X_799_2_137.pdf https://authors.library.caltech.edu/55607/2/1312.3015v1.pdf Saliwanchik, B. R. and Lueker, M. and Padin, S. and Shirokoff, E. and Vieira, J. D. (2015) Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations with the South Pole Telescope. Astrophysical Journal, 799 (2). Art. No. 137. ISSN 0004-637X. doi:10.1088/0004-637X/799/2/137. https://resolver.caltech.edu/CaltechAUTHORS:20150306-132050855 <https://resolver.caltech.edu/CaltechAUTHORS:20150306-132050855> |
op_rights |
other |
op_doi |
https://doi.org/10.1088/0004-637X/799/2/137 |
container_title |
The Astrophysical Journal |
container_volume |
799 |
container_issue |
2 |
container_start_page |
137 |
_version_ |
1766201613803847680 |