Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope
The adiabatic evolution of the temperature of the cosmic microwave background (CMB) is a key prediction of standard cosmology. We study deviations from the expected adiabatic evolution of the CMB temperature of the form T(z) = T_0(1 + z)^(1 − α) using measurements of the spectrum of the Sunyaev–Zel&...
Published in: | Monthly Notices of the Royal Astronomical Society |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Royal Astronomical Society
2014
|
Subjects: | |
Online Access: | https://authors.library.caltech.edu/46021/ https://authors.library.caltech.edu/46021/1/MNRAS-2014-Saro-2610-5.pdf https://authors.library.caltech.edu/46021/7/1312.2462v1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140602-063656018 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:46021 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:46021 2023-05-15T18:22:02+02:00 Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope Saro, A. Lueker, M. Padin, S. Shirokoff, E. Vieira, J. D. 2014-05 application/pdf https://authors.library.caltech.edu/46021/ https://authors.library.caltech.edu/46021/1/MNRAS-2014-Saro-2610-5.pdf https://authors.library.caltech.edu/46021/7/1312.2462v1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140602-063656018 en eng Royal Astronomical Society https://authors.library.caltech.edu/46021/1/MNRAS-2014-Saro-2610-5.pdf https://authors.library.caltech.edu/46021/7/1312.2462v1.pdf Saro, A. and Lueker, M. and Padin, S. and Shirokoff, E. and Vieira, J. D. (2014) Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope. Monthly Notices of the Royal Astronomical Society, 440 (3). pp. 2610-2615. ISSN 0035-8711. doi:10.1093/mnras/stu575. https://resolver.caltech.edu/CaltechAUTHORS:20140602-063656018 <https://resolver.caltech.edu/CaltechAUTHORS:20140602-063656018> other Article PeerReviewed 2014 ftcaltechauth https://doi.org/10.1093/mnras/stu575 2021-11-11T18:57:56Z The adiabatic evolution of the temperature of the cosmic microwave background (CMB) is a key prediction of standard cosmology. We study deviations from the expected adiabatic evolution of the CMB temperature of the form T(z) = T_0(1 + z)^(1 − α) using measurements of the spectrum of the Sunyaev–Zel'dovich effect with the South Pole Telescope (SPT). We present a method for using the ratio of the Sunyaev–Zel'dovich signal measured at 95 and 150 GHz in the SPT data to constrain the temperature of the CMB. We demonstrate that this approach provides unbiased results using mock observations of clusters from a new set of hydrodynamical simulations. We apply this method to a sample of 158 SPT-selected clusters, spanning the redshift range 0.05 < z < 1.35, and measure α=0.017^(+0.030)_(−0.028), consistent with the standard model prediction of α = 0. In combination with other published results, we find α = 0.005 ± 0.012, an improvement of ∼10 per cent over published constraints. This measurement also provides a strong constraint on the effective equation of state in models of decaying dark energy w_(eff) = −0.994 ± 0.010. Article in Journal/Newspaper South pole Caltech Authors (California Institute of Technology) South Pole Monthly Notices of the Royal Astronomical Society 440 3 2610 2615 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
The adiabatic evolution of the temperature of the cosmic microwave background (CMB) is a key prediction of standard cosmology. We study deviations from the expected adiabatic evolution of the CMB temperature of the form T(z) = T_0(1 + z)^(1 − α) using measurements of the spectrum of the Sunyaev–Zel'dovich effect with the South Pole Telescope (SPT). We present a method for using the ratio of the Sunyaev–Zel'dovich signal measured at 95 and 150 GHz in the SPT data to constrain the temperature of the CMB. We demonstrate that this approach provides unbiased results using mock observations of clusters from a new set of hydrodynamical simulations. We apply this method to a sample of 158 SPT-selected clusters, spanning the redshift range 0.05 < z < 1.35, and measure α=0.017^(+0.030)_(−0.028), consistent with the standard model prediction of α = 0. In combination with other published results, we find α = 0.005 ± 0.012, an improvement of ∼10 per cent over published constraints. This measurement also provides a strong constraint on the effective equation of state in models of decaying dark energy w_(eff) = −0.994 ± 0.010. |
format |
Article in Journal/Newspaper |
author |
Saro, A. Lueker, M. Padin, S. Shirokoff, E. Vieira, J. D. |
spellingShingle |
Saro, A. Lueker, M. Padin, S. Shirokoff, E. Vieira, J. D. Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope |
author_facet |
Saro, A. Lueker, M. Padin, S. Shirokoff, E. Vieira, J. D. |
author_sort |
Saro, A. |
title |
Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope |
title_short |
Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope |
title_full |
Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope |
title_fullStr |
Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope |
title_full_unstemmed |
Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope |
title_sort |
constraints on the cmb temperature evolution using multiband measurements of the sunyaev–zel’dovich effect with the south pole telescope |
publisher |
Royal Astronomical Society |
publishDate |
2014 |
url |
https://authors.library.caltech.edu/46021/ https://authors.library.caltech.edu/46021/1/MNRAS-2014-Saro-2610-5.pdf https://authors.library.caltech.edu/46021/7/1312.2462v1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140602-063656018 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://authors.library.caltech.edu/46021/1/MNRAS-2014-Saro-2610-5.pdf https://authors.library.caltech.edu/46021/7/1312.2462v1.pdf Saro, A. and Lueker, M. and Padin, S. and Shirokoff, E. and Vieira, J. D. (2014) Constraints on the CMB temperature evolution using multiband measurements of the Sunyaev–Zel’dovich effect with the South Pole Telescope. Monthly Notices of the Royal Astronomical Society, 440 (3). pp. 2610-2615. ISSN 0035-8711. doi:10.1093/mnras/stu575. https://resolver.caltech.edu/CaltechAUTHORS:20140602-063656018 <https://resolver.caltech.edu/CaltechAUTHORS:20140602-063656018> |
op_rights |
other |
op_doi |
https://doi.org/10.1093/mnras/stu575 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
440 |
container_issue |
3 |
container_start_page |
2610 |
op_container_end_page |
2615 |
_version_ |
1766201389925531648 |