Discriminating between unresolved point sources and "negative" SZ clusters in CMB maps
Clusters of galaxies produce negative features at wavelengths $λ> 1.25$ mm in CMB maps, by means of the thermal SZ effect, while point radio sources produce positive peaks. This fact implies that a distribution of unresolved SZ clusters could be detected using the negative asymmetry introduced in...
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ftdatacite:10.48550/arxiv.astro-ph/0211430 2023-05-15T18:22:41+02:00 Discriminating between unresolved point sources and "negative" SZ clusters in CMB maps Rubino-Martin, J. A. Sunyaev, R. A. 2002 https://dx.doi.org/10.48550/arxiv.astro-ph/0211430 https://arxiv.org/abs/astro-ph/0211430 unknown arXiv https://dx.doi.org/10.1046/j.1365-8711.2003.06893.x Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ Astrophysics astro-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2002 ftdatacite https://doi.org/10.48550/arxiv.astro-ph/0211430 https://doi.org/10.1046/j.1365-8711.2003.06893.x 2022-04-01T16:49:48Z Clusters of galaxies produce negative features at wavelengths $λ> 1.25$ mm in CMB maps, by means of the thermal SZ effect, while point radio sources produce positive peaks. This fact implies that a distribution of unresolved SZ clusters could be detected using the negative asymmetry introduced in the odd-moments of the brightness map (skewness and higher), or in the probability distribution function (PDF) for the fluctuations, once the map has been filtered in order to remove the contribution from primordial CMB fluctuations from large scales. This property provides a consistency check to the recent detections from CBI and BIMA experiments of an excess of power at small angular scales, in order to confirm that they are produced by a distribution of unresolved SZ clusters. However it will require at least 1.5 - 2 times more observing time than detection of corresponding power signal. This approach could also be used with the data of the planned SZ experiments (e.g. ACT, AMI, AMIBA, APEX, 8 m South Pole telescope). : Includes a new section and a new appendix. Typos corrected. Accepted for publication in MNRAS Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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Astrophysics astro-ph FOS Physical sciences |
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Astrophysics astro-ph FOS Physical sciences Rubino-Martin, J. A. Sunyaev, R. A. Discriminating between unresolved point sources and "negative" SZ clusters in CMB maps |
topic_facet |
Astrophysics astro-ph FOS Physical sciences |
description |
Clusters of galaxies produce negative features at wavelengths $λ> 1.25$ mm in CMB maps, by means of the thermal SZ effect, while point radio sources produce positive peaks. This fact implies that a distribution of unresolved SZ clusters could be detected using the negative asymmetry introduced in the odd-moments of the brightness map (skewness and higher), or in the probability distribution function (PDF) for the fluctuations, once the map has been filtered in order to remove the contribution from primordial CMB fluctuations from large scales. This property provides a consistency check to the recent detections from CBI and BIMA experiments of an excess of power at small angular scales, in order to confirm that they are produced by a distribution of unresolved SZ clusters. However it will require at least 1.5 - 2 times more observing time than detection of corresponding power signal. This approach could also be used with the data of the planned SZ experiments (e.g. ACT, AMI, AMIBA, APEX, 8 m South Pole telescope). : Includes a new section and a new appendix. Typos corrected. Accepted for publication in MNRAS |
format |
Text |
author |
Rubino-Martin, J. A. Sunyaev, R. A. |
author_facet |
Rubino-Martin, J. A. Sunyaev, R. A. |
author_sort |
Rubino-Martin, J. A. |
title |
Discriminating between unresolved point sources and "negative" SZ clusters in CMB maps |
title_short |
Discriminating between unresolved point sources and "negative" SZ clusters in CMB maps |
title_full |
Discriminating between unresolved point sources and "negative" SZ clusters in CMB maps |
title_fullStr |
Discriminating between unresolved point sources and "negative" SZ clusters in CMB maps |
title_full_unstemmed |
Discriminating between unresolved point sources and "negative" SZ clusters in CMB maps |
title_sort |
discriminating between unresolved point sources and "negative" sz clusters in cmb maps |
publisher |
arXiv |
publishDate |
2002 |
url |
https://dx.doi.org/10.48550/arxiv.astro-ph/0211430 https://arxiv.org/abs/astro-ph/0211430 |
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South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1046/j.1365-8711.2003.06893.x |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.astro-ph/0211430 https://doi.org/10.1046/j.1365-8711.2003.06893.x |
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1766202102908977152 |