The 2dF QSO Redshift Survey - II. Structure and evolution at high redshift
We present a clustering analysis of QSOs over the redshift range z=0.3-2.9. We use a sample of 10558 QSOs taken from the preliminary catalogue of the 2dF QSO Redshift Survey (2QZ). The two-point redshift-space correlation function of QSOs is shown to follow a power law on scales s~1-35h-1Mpc. Fittin...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2000
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| _version_ | 1797054803492208640 |
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| author | Croom, S Shanks, T Boyle, B Smith, R Miller, L Loaring, N Hoyle, F |
| author_facet | Croom, S Shanks, T Boyle, B Smith, R Miller, L Loaring, N Hoyle, F |
| author_sort | Croom, S |
| collection | OXFORD |
| description | We present a clustering analysis of QSOs over the redshift range z=0.3-2.9. We use a sample of 10558 QSOs taken from the preliminary catalogue of the 2dF QSO Redshift Survey (2QZ). The two-point redshift-space correlation function of QSOs is shown to follow a power law on scales s~1-35h-1Mpc. Fitting a power law to QSO clustering averaged over the redshift interval 0.3<z<2.9 (eds).="" (rejected="" 2qz.="" a="" although="" an="" and="" apply,="" are="" as="" at="" best="" clustering="" comoving="" comparable="" coordinates="" cosmology="" does="" eds="" einstein-de="" evolution="" extends="" find="" fit="" follow="" for="" function="" galaxies.="" gamma="1.56+0.10-0.09." gravitational="" growth="" high="" in="" increase="" instability="" is="" lambda_0="0.7" large="" law="" linear="" local="" marginal="" mean="" measure="" measured="" no="" not="" of="" omega_0="0.3" on="" optically="" over="" power="" predictions="" qso="" qsos="" range="" redshift="" redshift.="" s_0="5.69+0.42-0.50h-1Mpc" scales="" selected="" should="" shows="" sitter="" s~60h-1mpc="" the="" theory="" there="" these="" to="" values,="" via="" we="" where="" with="" z="1.49,">99 per cent confidence level). A redshift dependent bias is required to reconcile QSO clustering observations with theory. A simple biasing model, in which QSOs have cosmologically long lifetimes (or alternatively form in peaks above a constant threshold in the density field) is acceptable in an EdS cosmology, but is only marginally acceptable if Omega_0=0.3 and lambda_0=0.7. Biasing models which assume QSOs form over a range in redshift, based on the Press-Schechter formalism are approximately consistent with QSO clustering evolution (abridged).</z<2.9> |
| first_indexed | 2024-03-06T19:02:24Z |
| format | Journal article |
| id | oxford-uuid:13fb621f-b767-4b05-bf19-c60f4ff84394 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:02:24Z |
| publishDate | 2000 |
| record_format | dspace |
| spelling | oxford-uuid:13fb621f-b767-4b05-bf19-c60f4ff843942022-03-26T10:16:59ZThe 2dF QSO Redshift Survey - II. Structure and evolution at high redshiftJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:13fb621f-b767-4b05-bf19-c60f4ff84394EnglishSymplectic Elements at Oxford2000Croom, SShanks, TBoyle, BSmith, RMiller, LLoaring, NHoyle, FWe present a clustering analysis of QSOs over the redshift range z=0.3-2.9. We use a sample of 10558 QSOs taken from the preliminary catalogue of the 2dF QSO Redshift Survey (2QZ). The two-point redshift-space correlation function of QSOs is shown to follow a power law on scales s~1-35h-1Mpc. Fitting a power law to QSO clustering averaged over the redshift interval 0.3<z<2.9 (eds).="" (rejected="" 2qz.="" a="" although="" an="" and="" apply,="" are="" as="" at="" best="" clustering="" comoving="" comparable="" coordinates="" cosmology="" does="" eds="" einstein-de="" evolution="" extends="" find="" fit="" follow="" for="" function="" galaxies.="" gamma="1.56+0.10-0.09." gravitational="" growth="" high="" in="" increase="" instability="" is="" lambda_0="0.7" large="" law="" linear="" local="" marginal="" mean="" measure="" measured="" no="" not="" of="" omega_0="0.3" on="" optically="" over="" power="" predictions="" qso="" qsos="" range="" redshift="" redshift.="" s_0="5.69+0.42-0.50h-1Mpc" scales="" selected="" should="" shows="" sitter="" s~60h-1mpc="" the="" theory="" there="" these="" to="" values,="" via="" we="" where="" with="" z="1.49,">99 per cent confidence level). A redshift dependent bias is required to reconcile QSO clustering observations with theory. A simple biasing model, in which QSOs have cosmologically long lifetimes (or alternatively form in peaks above a constant threshold in the density field) is acceptable in an EdS cosmology, but is only marginally acceptable if Omega_0=0.3 and lambda_0=0.7. Biasing models which assume QSOs form over a range in redshift, based on the Press-Schechter formalism are approximately consistent with QSO clustering evolution (abridged).</z<2.9> |
| spellingShingle | Croom, S Shanks, T Boyle, B Smith, R Miller, L Loaring, N Hoyle, F The 2dF QSO Redshift Survey - II. Structure and evolution at high redshift |
| title | The 2dF QSO Redshift Survey - II. Structure and evolution at high
redshift |
| title_full | The 2dF QSO Redshift Survey - II. Structure and evolution at high
redshift |
| title_fullStr | The 2dF QSO Redshift Survey - II. Structure and evolution at high
redshift |
| title_full_unstemmed | The 2dF QSO Redshift Survey - II. Structure and evolution at high
redshift |
| title_short | The 2dF QSO Redshift Survey - II. Structure and evolution at high
redshift |
| title_sort | 2df qso redshift survey ii structure and evolution at high redshift |
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