Preprint typeset using L ATEX style emulateapj v. 6/22/04 PRIMORDIAL NON-GAUSSIANITY AND DARK ENERGY CONSTRAINTS FROM CLUSTER SURVEYS
Galaxy cluster surveys will be a powerful probe of dark energy. At the same time, cluster abundance is sensitive to any non-Gaussianity of the primordial density field. It is therefore possible that non-Gaussian initial conditions might be misinterpreted as a sign of dark energy or at least degrade...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.254.3236 2023-05-15T18:22:44+02:00 Preprint typeset using L ATEX style emulateapj v. 6/22/04 PRIMORDIAL NON-GAUSSIANITY AND DARK ENERGY CONSTRAINTS FROM CLUSTER SURVEYS Emiliano Sefusatti Chris Vale Kenji Kadota Joshua Frieman The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.254.3236 http://arxiv.org/pdf/astro-ph/0609124v3.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.254.3236 http://arxiv.org/pdf/astro-ph/0609124v3.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://arxiv.org/pdf/astro-ph/0609124v3.pdf text 2008 ftciteseerx 2016-01-07T19:51:39Z Galaxy cluster surveys will be a powerful probe of dark energy. At the same time, cluster abundance is sensitive to any non-Gaussianity of the primordial density field. It is therefore possible that non-Gaussian initial conditions might be misinterpreted as a sign of dark energy or at least degrade the expected constraints on dark energy parameters. To address this issue, we perform a likelihood analysis of an ideal cluster survey similar in size and depth to the upcoming South Pole Telescope/Dark Energy Survey (SPT-DES). We analyze a model in which the strength of the non-Gaussianity is parameterized by the constant fNL; this model has been used extensively to derive Cosmic Microwave Background (CMB) anisotropy constraints on non-Gaussianity, allowing us to make contact with those works. We find that the constraining power of the cluster survey on dark energy observables is not significantly diminished by non-Gaussianity provided that cluster redshift information is included in the analysis. We also find that even an ideal cluster survey is unlikely to improve significantly current and future CMB constraints on non-Gaussianity. However, when all systematics are under control, it could constitute a valuable cross check to CMB observations. Text South pole Unknown South Pole |
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Galaxy cluster surveys will be a powerful probe of dark energy. At the same time, cluster abundance is sensitive to any non-Gaussianity of the primordial density field. It is therefore possible that non-Gaussian initial conditions might be misinterpreted as a sign of dark energy or at least degrade the expected constraints on dark energy parameters. To address this issue, we perform a likelihood analysis of an ideal cluster survey similar in size and depth to the upcoming South Pole Telescope/Dark Energy Survey (SPT-DES). We analyze a model in which the strength of the non-Gaussianity is parameterized by the constant fNL; this model has been used extensively to derive Cosmic Microwave Background (CMB) anisotropy constraints on non-Gaussianity, allowing us to make contact with those works. We find that the constraining power of the cluster survey on dark energy observables is not significantly diminished by non-Gaussianity provided that cluster redshift information is included in the analysis. We also find that even an ideal cluster survey is unlikely to improve significantly current and future CMB constraints on non-Gaussianity. However, when all systematics are under control, it could constitute a valuable cross check to CMB observations. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Emiliano Sefusatti Chris Vale Kenji Kadota Joshua Frieman |
spellingShingle |
Emiliano Sefusatti Chris Vale Kenji Kadota Joshua Frieman Preprint typeset using L ATEX style emulateapj v. 6/22/04 PRIMORDIAL NON-GAUSSIANITY AND DARK ENERGY CONSTRAINTS FROM CLUSTER SURVEYS |
author_facet |
Emiliano Sefusatti Chris Vale Kenji Kadota Joshua Frieman |
author_sort |
Emiliano Sefusatti |
title |
Preprint typeset using L ATEX style emulateapj v. 6/22/04 PRIMORDIAL NON-GAUSSIANITY AND DARK ENERGY CONSTRAINTS FROM CLUSTER SURVEYS |
title_short |
Preprint typeset using L ATEX style emulateapj v. 6/22/04 PRIMORDIAL NON-GAUSSIANITY AND DARK ENERGY CONSTRAINTS FROM CLUSTER SURVEYS |
title_full |
Preprint typeset using L ATEX style emulateapj v. 6/22/04 PRIMORDIAL NON-GAUSSIANITY AND DARK ENERGY CONSTRAINTS FROM CLUSTER SURVEYS |
title_fullStr |
Preprint typeset using L ATEX style emulateapj v. 6/22/04 PRIMORDIAL NON-GAUSSIANITY AND DARK ENERGY CONSTRAINTS FROM CLUSTER SURVEYS |
title_full_unstemmed |
Preprint typeset using L ATEX style emulateapj v. 6/22/04 PRIMORDIAL NON-GAUSSIANITY AND DARK ENERGY CONSTRAINTS FROM CLUSTER SURVEYS |
title_sort |
preprint typeset using l atex style emulateapj v. 6/22/04 primordial non-gaussianity and dark energy constraints from cluster surveys |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.254.3236 http://arxiv.org/pdf/astro-ph/0609124v3.pdf |
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South Pole |
geographic_facet |
South Pole |
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South pole |
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South pole |
op_source |
http://arxiv.org/pdf/astro-ph/0609124v3.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.254.3236 http://arxiv.org/pdf/astro-ph/0609124v3.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766202161171005440 |