The 2dF Galaxy Redshift Survey: the power spectrum and the matter content of the Universe
Identifieur interne : 000439 ( Main/Exploration ); précédent : 000438; suivant : 000440The 2dF Galaxy Redshift Survey: the power spectrum and the matter content of the Universe
Auteurs : Will J. Percival [Royaume-Uni] ; Carlton M. Baugh ; Joss Bland-Hawthorn [Australie] ; Terry Bridges [Australie] ; Russell Cannon [Australie] ; Shaun Cole ; Matthew Colless [Australie] ; Chris Collins ; Warrick Couch [Australie] ; Gavin Dalton ; Roberto De Propris [Australie] ; Simon P. Driver ; George Efstathiou ; Richard S. Ellis [États-Unis] ; Carlos S. Frenk ; Karl Glazebrook [États-Unis] ; Carole Jackson [Australie] ; Ofer Lahav ; Ian Lewis [Australie] ; Stuart Lumsden ; Steve Maddox ; Stephen Moody ; Peder Norberg ; John A. Peacock ; Bruce A. Peterson [Australie] ; Will Sutherland ; Keith Taylor [Australie]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2001-11-11.
English descriptors
Abstract
The 2dF Galaxy Redshift Survey has now measured in excess of 160-000 galaxy redshifts. This paper presents the power spectrum of the galaxy distribution, calculated using a direct Fourier transform based technique. We argue that, within the k-space region , the shape of this spectrum should be close to that of the linear density perturbations convolved with the window function of the survey. This window function and its convolving effect on the power spectrum estimate are analysed in detail. By convolving model spectra, we are able to fit the power-spectrum data and provide a measure of the matter content of the Universe. Our results show that models containing baryon oscillations are mildly preferred over featureless power spectra. Analysis of the data yields 68 per cent confidence limits on the total matter density times the Hubble parameter , and the baryon fraction , assuming scale-invariant primordial fluctuations.
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DOI: 10.1046/j.1365-8711.2001.04827.x
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Box 296, Epping, NSW 2121</wicri:regionArea><wicri:noRegion>NSW 2121</wicri:noRegion></affiliation></author><author><name sortKey="Bridges, Terry" sort="Bridges, Terry" uniqKey="Bridges T" first="Terry" last="Bridges">Terry Bridges</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>Anglo-Australian Observatory, P. O. Box 296, Epping, NSW 2121</wicri:regionArea><wicri:noRegion>NSW 2121</wicri:noRegion></affiliation></author><author><name sortKey="Cannon, Russell" sort="Cannon, Russell" uniqKey="Cannon R" first="Russell" last="Cannon">Russell Cannon</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>Anglo-Australian Observatory, P. O. 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Frenk</name><affiliation><wicri:noCountry code="subField">3LE</wicri:noCountry></affiliation></author><author><name sortKey="Glazebrook, Karl" sort="Glazebrook, Karl" uniqKey="Glazebrook K" first="Karl" last="Glazebrook">Karl Glazebrook</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Physics & Astronomy, Johns Hopkins University, Baltimore, MD 21218-2686</wicri:regionArea><wicri:noRegion>MD 21218-2686</wicri:noRegion></affiliation></author><author><name sortKey="Jackson, Carole" sort="Jackson, Carole" uniqKey="Jackson C" first="Carole" last="Jackson">Carole Jackson</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>Research School of Astronomy & Astrophysics, The Australian National University, Weston Creek, ACT 2611</wicri:regionArea><wicri:noRegion>ACT 2611</wicri:noRegion></affiliation></author><author><name sortKey="Lahav, Ofer" sort="Lahav, Ofer" uniqKey="Lahav O" first="Ofer" last="Lahav">Ofer Lahav</name><affiliation><wicri:noCountry code="subField">0HA</wicri:noCountry></affiliation></author><author><name sortKey="Lewis, Ian" sort="Lewis, Ian" uniqKey="Lewis I" first="Ian" last="Lewis">Ian Lewis</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>Anglo-Australian Observatory, P. O. Box 296, Epping, NSW 2121</wicri:regionArea><wicri:noRegion>NSW 2121</wicri:noRegion></affiliation></author><author><name sortKey="Lumsden, Stuart" sort="Lumsden, Stuart" uniqKey="Lumsden S" first="Stuart" last="Lumsden">Stuart Lumsden</name><affiliation><wicri:noCountry code="subField">9JT</wicri:noCountry></affiliation></author><author><name sortKey="Maddox, Steve" sort="Maddox, Steve" uniqKey="Maddox S" first="Steve" last="Maddox">Steve Maddox</name><affiliation><wicri:noCountry code="subField">2RD</wicri:noCountry></affiliation></author><author><name sortKey="Moody, Stephen" sort="Moody, Stephen" uniqKey="Moody S" first="Stephen" last="Moody">Stephen Moody</name><affiliation><wicri:noCountry code="subField">0HA</wicri:noCountry></affiliation></author><author><name sortKey="Norberg, Peder" sort="Norberg, Peder" uniqKey="Norberg P" first="Peder" last="Norberg">Peder Norberg</name><affiliation><wicri:noCountry code="subField">3LE</wicri:noCountry></affiliation></author><author><name sortKey="Peacock, John A" sort="Peacock, John A" uniqKey="Peacock J" first="John A." last="Peacock">John A. Peacock</name><affiliation><wicri:noCountry code="subField">3HJ</wicri:noCountry></affiliation></author><author><name sortKey="Peterson, Bruce A" sort="Peterson, Bruce A" uniqKey="Peterson B" first="Bruce A." last="Peterson">Bruce A. Peterson</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>Research School of Astronomy & Astrophysics, The Australian National University, Weston Creek, ACT 2611</wicri:regionArea><wicri:noRegion>ACT 2611</wicri:noRegion></affiliation></author><author><name sortKey="Sutherland, Will" sort="Sutherland, Will" uniqKey="Sutherland W" first="Will" last="Sutherland">Will Sutherland</name><affiliation><wicri:noCountry code="subField">3HJ</wicri:noCountry></affiliation></author><author><name sortKey="Taylor, Keith" sort="Taylor, Keith" uniqKey="Taylor K" first="Keith" last="Taylor">Keith Taylor</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>Anglo-Australian Observatory, P. O. Box 296, Epping, NSW 2121</wicri:regionArea><wicri:noRegion>NSW 2121</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Monthly Notices of the Royal Astronomical Society</title><title level="j" type="abbrev">Mon. Not. R. Astron. Soc.</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><publisher>Blackwell Science Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2001-11-11">2001-11-11</date><biblScope unit="volume">327</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="1297">1297</biblScope><biblScope unit="page" to="1306">1306</biblScope></imprint><idno type="ISSN">0035-8711</idno></series><idno type="istex">D322953CA1436006D1F85A0DEBC8A038B7B7A8A4</idno><idno type="DOI">10.1046/j.1365-8711.2001.04827.x</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>cosmological parameters</term><term>large-scale structure of Universe</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">The 2dF Galaxy Redshift Survey has now measured in excess of 160-000 galaxy redshifts. This paper presents the power spectrum of the galaxy distribution, calculated using a direct Fourier transform based technique. We argue that, within the k-space region , the shape of this spectrum should be close to that of the linear density perturbations convolved with the window function of the survey. This window function and its convolving effect on the power spectrum estimate are analysed in detail. By convolving model spectra, we are able to fit the power-spectrum data and provide a measure of the matter content of the Universe. Our results show that models containing baryon oscillations are mildly preferred over featureless power spectra. Analysis of the data yields 68 per cent confidence limits on the total matter density times the Hubble parameter , and the baryon fraction , assuming scale-invariant primordial fluctuations.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Royaume-Uni</li><li>États-Unis</li></country></list><tree><noCountry><name sortKey="Baugh, Carlton M" sort="Baugh, Carlton M" uniqKey="Baugh C" first="Carlton M." last="Baugh">Carlton M. Baugh</name><name sortKey="Cole, Shaun" sort="Cole, Shaun" uniqKey="Cole S" first="Shaun" last="Cole">Shaun Cole</name><name sortKey="Collins, Chris" sort="Collins, Chris" uniqKey="Collins C" first="Chris" last="Collins">Chris Collins</name><name sortKey="Dalton, Gavin" sort="Dalton, Gavin" uniqKey="Dalton G" first="Gavin" last="Dalton">Gavin Dalton</name><name sortKey="Driver, Simon P" sort="Driver, Simon P" uniqKey="Driver S" first="Simon P." last="Driver">Simon P. Driver</name><name sortKey="Efstathiou, George" sort="Efstathiou, George" uniqKey="Efstathiou G" first="George" last="Efstathiou">George Efstathiou</name><name sortKey="Frenk, Carlos S" sort="Frenk, Carlos S" uniqKey="Frenk C" first="Carlos S." last="Frenk">Carlos S. Frenk</name><name sortKey="Lahav, Ofer" sort="Lahav, Ofer" uniqKey="Lahav O" first="Ofer" last="Lahav">Ofer Lahav</name><name sortKey="Lumsden, Stuart" sort="Lumsden, Stuart" uniqKey="Lumsden S" first="Stuart" last="Lumsden">Stuart Lumsden</name><name sortKey="Maddox, Steve" sort="Maddox, Steve" uniqKey="Maddox S" first="Steve" last="Maddox">Steve Maddox</name><name sortKey="Moody, Stephen" sort="Moody, Stephen" uniqKey="Moody S" first="Stephen" last="Moody">Stephen Moody</name><name sortKey="Norberg, Peder" sort="Norberg, Peder" uniqKey="Norberg P" first="Peder" last="Norberg">Peder Norberg</name><name sortKey="Peacock, John A" sort="Peacock, John A" uniqKey="Peacock J" first="John A." last="Peacock">John A. Peacock</name><name sortKey="Sutherland, Will" sort="Sutherland, Will" uniqKey="Sutherland W" first="Will" last="Sutherland">Will Sutherland</name></noCountry><country name="Royaume-Uni"><noRegion><name sortKey="Percival, Will J" sort="Percival, Will J" uniqKey="Percival W" first="Will J." last="Percival">Will J. Percival</name></noRegion></country><country name="Australie"><noRegion><name sortKey="Bland Hawthorn, Joss" sort="Bland Hawthorn, Joss" uniqKey="Bland Hawthorn J" first="Joss" last="Bland-Hawthorn">Joss Bland-Hawthorn</name></noRegion><name sortKey="Bridges, Terry" sort="Bridges, Terry" uniqKey="Bridges T" first="Terry" last="Bridges">Terry Bridges</name><name sortKey="Cannon, Russell" sort="Cannon, Russell" uniqKey="Cannon R" first="Russell" last="Cannon">Russell Cannon</name><name sortKey="Colless, Matthew" sort="Colless, Matthew" uniqKey="Colless M" first="Matthew" last="Colless">Matthew Colless</name><name sortKey="Couch, Warrick" sort="Couch, Warrick" uniqKey="Couch W" first="Warrick" last="Couch">Warrick Couch</name><name sortKey="De Propris, Roberto" sort="De Propris, Roberto" uniqKey="De Propris R" first="Roberto" last="De Propris">Roberto De Propris</name><name sortKey="Jackson, Carole" sort="Jackson, Carole" uniqKey="Jackson C" first="Carole" last="Jackson">Carole Jackson</name><name sortKey="Lewis, Ian" sort="Lewis, Ian" uniqKey="Lewis I" first="Ian" last="Lewis">Ian Lewis</name><name sortKey="Peterson, Bruce A" sort="Peterson, Bruce A" uniqKey="Peterson B" first="Bruce A." last="Peterson">Bruce A. Peterson</name><name sortKey="Taylor, Keith" sort="Taylor, Keith" uniqKey="Taylor K" first="Keith" last="Taylor">Keith Taylor</name></country><country name="États-Unis"><noRegion><name sortKey="Ellis, Richard S" sort="Ellis, Richard S" uniqKey="Ellis R" first="Richard S." last="Ellis">Richard S. Ellis</name></noRegion><name sortKey="Glazebrook, Karl" sort="Glazebrook, Karl" uniqKey="Glazebrook K" first="Karl" last="Glazebrook">Karl Glazebrook</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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