Preprint typeset using L ATEX style emulateapj v. 04/03/99 REDSHIFT ACCURACY REQUIREMENTS FOR FUTURE SUPERNOVA AND NUMBER COUNT SURVEYS
We investigate the required redshift accuracy of type Ia supernova and cluster number-count surveys in order for the redshift uncertainties not to contribute appreciably to the dark energy parameter error budget. For the SNAP supernova experiment, we find that, without the assistance of ground-based...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.317.5376 2023-05-15T18:22:56+02:00 Preprint typeset using L ATEX style emulateapj v. 04/03/99 REDSHIFT ACCURACY REQUIREMENTS FOR FUTURE SUPERNOVA AND NUMBER COUNT SURVEYS Dragan Huterer Alex Kim Lawrence M. Krauss Tamara Broderick The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.317.5376 http://arxiv.org/pdf/astro-ph/0402002v1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.317.5376 http://arxiv.org/pdf/astro-ph/0402002v1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://arxiv.org/pdf/astro-ph/0402002v1.pdf text 2008 ftciteseerx 2016-09-04T00:10:01Z We investigate the required redshift accuracy of type Ia supernova and cluster number-count surveys in order for the redshift uncertainties not to contribute appreciably to the dark energy parameter error budget. For the SNAP supernova experiment, we find that, without the assistance of ground-based measurements, individual supernova redshifts would need to be determined to about 0.002 or better, which is a challenging but feasible requirement for a low-resolution spectrograph. However, we find that accurate redshifts for z < 0.1 supernovae, obtained with ground-based experiments, are sufficient to immunize the results against even relatively large redshift errors at high z. For the future cluster number-count surveys such as the South Pole Telescope, Planck or DUET, we find that the purely statistical error in photometric redshift is less important, and that the irreducible, systematic bias in redshift drives the requirements. The redshift bias will have to be kept below 0.001-0.005 per redshift bin (which is determined by the filter set), depending on the sky coverage and details of the definition of the minimal mass of the survey. Furthermore, we find that X-ray surveys have a more stringent required redshift accuracy than Sunyaev-Zeldovich (SZ) effect surveys since they use a shorter lever arm in redshift; conversely, SZ surveys benefit from their high redshift reach only so long as some redshift information is available for distant (z ∼> 1) clusters. Subject headings: cosmology: theory – large-scale structure of universe 1. Text South pole Unknown Lever ENVELOPE(-63.608,-63.608,-65.506,-65.506) South Pole |
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ftciteseerx |
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English |
description |
We investigate the required redshift accuracy of type Ia supernova and cluster number-count surveys in order for the redshift uncertainties not to contribute appreciably to the dark energy parameter error budget. For the SNAP supernova experiment, we find that, without the assistance of ground-based measurements, individual supernova redshifts would need to be determined to about 0.002 or better, which is a challenging but feasible requirement for a low-resolution spectrograph. However, we find that accurate redshifts for z < 0.1 supernovae, obtained with ground-based experiments, are sufficient to immunize the results against even relatively large redshift errors at high z. For the future cluster number-count surveys such as the South Pole Telescope, Planck or DUET, we find that the purely statistical error in photometric redshift is less important, and that the irreducible, systematic bias in redshift drives the requirements. The redshift bias will have to be kept below 0.001-0.005 per redshift bin (which is determined by the filter set), depending on the sky coverage and details of the definition of the minimal mass of the survey. Furthermore, we find that X-ray surveys have a more stringent required redshift accuracy than Sunyaev-Zeldovich (SZ) effect surveys since they use a shorter lever arm in redshift; conversely, SZ surveys benefit from their high redshift reach only so long as some redshift information is available for distant (z ∼> 1) clusters. Subject headings: cosmology: theory – large-scale structure of universe 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Dragan Huterer Alex Kim Lawrence M. Krauss Tamara Broderick |
spellingShingle |
Dragan Huterer Alex Kim Lawrence M. Krauss Tamara Broderick Preprint typeset using L ATEX style emulateapj v. 04/03/99 REDSHIFT ACCURACY REQUIREMENTS FOR FUTURE SUPERNOVA AND NUMBER COUNT SURVEYS |
author_facet |
Dragan Huterer Alex Kim Lawrence M. Krauss Tamara Broderick |
author_sort |
Dragan Huterer |
title |
Preprint typeset using L ATEX style emulateapj v. 04/03/99 REDSHIFT ACCURACY REQUIREMENTS FOR FUTURE SUPERNOVA AND NUMBER COUNT SURVEYS |
title_short |
Preprint typeset using L ATEX style emulateapj v. 04/03/99 REDSHIFT ACCURACY REQUIREMENTS FOR FUTURE SUPERNOVA AND NUMBER COUNT SURVEYS |
title_full |
Preprint typeset using L ATEX style emulateapj v. 04/03/99 REDSHIFT ACCURACY REQUIREMENTS FOR FUTURE SUPERNOVA AND NUMBER COUNT SURVEYS |
title_fullStr |
Preprint typeset using L ATEX style emulateapj v. 04/03/99 REDSHIFT ACCURACY REQUIREMENTS FOR FUTURE SUPERNOVA AND NUMBER COUNT SURVEYS |
title_full_unstemmed |
Preprint typeset using L ATEX style emulateapj v. 04/03/99 REDSHIFT ACCURACY REQUIREMENTS FOR FUTURE SUPERNOVA AND NUMBER COUNT SURVEYS |
title_sort |
preprint typeset using l atex style emulateapj v. 04/03/99 redshift accuracy requirements for future supernova and number count surveys |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.317.5376 http://arxiv.org/pdf/astro-ph/0402002v1.pdf |
long_lat |
ENVELOPE(-63.608,-63.608,-65.506,-65.506) |
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Lever South Pole |
geographic_facet |
Lever South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
http://arxiv.org/pdf/astro-ph/0402002v1.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.317.5376 http://arxiv.org/pdf/astro-ph/0402002v1.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766202347558535168 |