Redshifting Rings of Power
The cosmic microwave background (CMB) has provided a precise template for features in the linear power spectrum: the matter-radiation turnover, sound horizon drop, and acoustic oscillations. In a two dimensional power spectrum in redshift and angular space, the features appear as distorted rings, an...
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ftcern:oai:cds.cern.ch:619655 2023-05-15T18:22:51+02:00 Redshifting Rings of Power Hu, W Haiman, Z 2003-06-02 http://cds.cern.ch/record/619655 eng eng http://cds.cern.ch/record/619655 astro-ph/0306053 oai:cds.cern.ch:619655 Astrophysics and Astronomy 2003 ftcern 2018-07-28T05:59:03Z The cosmic microwave background (CMB) has provided a precise template for features in the linear power spectrum: the matter-radiation turnover, sound horizon drop, and acoustic oscillations. In a two dimensional power spectrum in redshift and angular space, the features appear as distorted rings, and yield simultaneous, purely geometric, measures of the Hubble parameter H(z) and angular diameter distance D_A(z) via an absolute version of the Alcock-Paczynski test. Employing a simple Fisher matrix tool, we explore how future surveys can exploit these rings of power for dark energy studies. High-z CMB determinations of H and D_A are best complemented at moderate to low redshift (z < 0.5) with a population of objects that are at least as abundant as clusters of galaxies. We find that a sample similar to that of the ongoing SDSS Luminous Red Galaxy (LRG) survey can achieve statistical errors at the ~5% level for D_A(z) and H(z) in several redshift bins. This, in turn, implies errors of sigma(w)=0.03-0.05 for a constant dark energy equation of state in a flat universe. Deep galaxy cluster surveys such as the planned South Pole Telescope (SPT) survey, can extend this test out to z~1 or as far as redshift followup is available. We find that the expected constraints are at the sigma(w)=0.04-0.08 level, comparable to galaxies and complementary in redshift coverage. Other/Unknown Material South pole CERN Document Server (CDS) Alcock ENVELOPE(-61.127,-61.127,-64.240,-64.240) Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) South Pole |
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Open Polar |
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CERN Document Server (CDS) |
op_collection_id |
ftcern |
language |
English |
topic |
Astrophysics and Astronomy |
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Astrophysics and Astronomy Hu, W Haiman, Z Redshifting Rings of Power |
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Astrophysics and Astronomy |
description |
The cosmic microwave background (CMB) has provided a precise template for features in the linear power spectrum: the matter-radiation turnover, sound horizon drop, and acoustic oscillations. In a two dimensional power spectrum in redshift and angular space, the features appear as distorted rings, and yield simultaneous, purely geometric, measures of the Hubble parameter H(z) and angular diameter distance D_A(z) via an absolute version of the Alcock-Paczynski test. Employing a simple Fisher matrix tool, we explore how future surveys can exploit these rings of power for dark energy studies. High-z CMB determinations of H and D_A are best complemented at moderate to low redshift (z < 0.5) with a population of objects that are at least as abundant as clusters of galaxies. We find that a sample similar to that of the ongoing SDSS Luminous Red Galaxy (LRG) survey can achieve statistical errors at the ~5% level for D_A(z) and H(z) in several redshift bins. This, in turn, implies errors of sigma(w)=0.03-0.05 for a constant dark energy equation of state in a flat universe. Deep galaxy cluster surveys such as the planned South Pole Telescope (SPT) survey, can extend this test out to z~1 or as far as redshift followup is available. We find that the expected constraints are at the sigma(w)=0.04-0.08 level, comparable to galaxies and complementary in redshift coverage. |
author |
Hu, W Haiman, Z |
author_facet |
Hu, W Haiman, Z |
author_sort |
Hu, W |
title |
Redshifting Rings of Power |
title_short |
Redshifting Rings of Power |
title_full |
Redshifting Rings of Power |
title_fullStr |
Redshifting Rings of Power |
title_full_unstemmed |
Redshifting Rings of Power |
title_sort |
redshifting rings of power |
publishDate |
2003 |
url |
http://cds.cern.ch/record/619655 |
long_lat |
ENVELOPE(-61.127,-61.127,-64.240,-64.240) ENVELOPE(158.317,158.317,-80.867,-80.867) |
geographic |
Alcock Hubble South Pole |
geographic_facet |
Alcock Hubble South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://cds.cern.ch/record/619655 astro-ph/0306053 oai:cds.cern.ch:619655 |
_version_ |
1766202257816158208 |