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 abundances 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...
Main Authors: | , , , , |
---|---|
Language: | unknown |
Published: |
2022
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/892484 https://www.osti.gov/biblio/892484 |
id |
ftosti:oai:osti.gov:892484 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:892484 2023-07-30T04:06:54+02:00 Primordial non-Gaussianity and Dark Energy constraints from Cluster Surveys Sefusatti, Emiliano Vale, Chris Kadota, Kenji Frieman, Joshua /Fermilab /KICP, Chicago /Chicago U., Astron. Astrophys. Ctr.; 2022-02-02 application/pdf http://www.osti.gov/servlets/purl/892484 https://www.osti.gov/biblio/892484 unknown http://www.osti.gov/servlets/purl/892484 https://www.osti.gov/biblio/892484 71 CLASSICAL AND QUANTUM MECHANICS GENERAL PHYSICS ANISOTROPY GALAXY CLUSTERS PROBES RELICT RADIATION 2022 ftosti 2023-07-11T08:43:53Z Galaxy cluster surveys will be a powerful probe of dark energy. At the same time, cluster abundances 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 f{sub NL}; 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. Other/Unknown Material South pole SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) South Pole |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
71 CLASSICAL AND QUANTUM MECHANICS GENERAL PHYSICS ANISOTROPY GALAXY CLUSTERS PROBES RELICT RADIATION |
spellingShingle |
71 CLASSICAL AND QUANTUM MECHANICS GENERAL PHYSICS ANISOTROPY GALAXY CLUSTERS PROBES RELICT RADIATION Sefusatti, Emiliano Vale, Chris Kadota, Kenji Frieman, Joshua /Fermilab /KICP, Chicago /Chicago U., Astron. Astrophys. Ctr.; Primordial non-Gaussianity and Dark Energy constraints from Cluster Surveys |
topic_facet |
71 CLASSICAL AND QUANTUM MECHANICS GENERAL PHYSICS ANISOTROPY GALAXY CLUSTERS PROBES RELICT RADIATION |
description |
Galaxy cluster surveys will be a powerful probe of dark energy. At the same time, cluster abundances 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 f{sub NL}; 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. |
author |
Sefusatti, Emiliano Vale, Chris Kadota, Kenji Frieman, Joshua /Fermilab /KICP, Chicago /Chicago U., Astron. Astrophys. Ctr.; |
author_facet |
Sefusatti, Emiliano Vale, Chris Kadota, Kenji Frieman, Joshua /Fermilab /KICP, Chicago /Chicago U., Astron. Astrophys. Ctr.; |
author_sort |
Sefusatti, Emiliano |
title |
Primordial non-Gaussianity and Dark Energy constraints from Cluster Surveys |
title_short |
Primordial non-Gaussianity and Dark Energy constraints from Cluster Surveys |
title_full |
Primordial non-Gaussianity and Dark Energy constraints from Cluster Surveys |
title_fullStr |
Primordial non-Gaussianity and Dark Energy constraints from Cluster Surveys |
title_full_unstemmed |
Primordial non-Gaussianity and Dark Energy constraints from Cluster Surveys |
title_sort |
primordial non-gaussianity and dark energy constraints from cluster surveys |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/892484 https://www.osti.gov/biblio/892484 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://www.osti.gov/servlets/purl/892484 https://www.osti.gov/biblio/892484 |
_version_ |
1772819849407365120 |