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Published byLoraine Fields Modified over 8 years ago
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BAO,ISW+SZ from AA +SDSS Utane Sawangwit, Tom Shanks, Durham University + 2SLAQ + AAOmega teams
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Summary SDSS, 2SLAQ + AAOmega LRG z surveys AAOmega photo-z LRG small scale clustering results AAOmega photo-z LRG BAO results AAOmega photo-z LRG ISW results AAOmega photo-z LRG + ACO SZ results All results preliminary!!!!
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2SLAQ LRG Wedge Plot
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AAOmega AAOmega is the new spectrograph for AAT 2dF 392 fibres Blue and Red Arm AAOmega pilot in March 2006 to survey riz selected LRGs to z~0.9
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1.5 million SDSS LRGs SDSS, 2SLAQ LRGs use gri colour-cuts AAOmega LRGs use riz colour-cuts Simply use w(θ) on colour-cut LRGs rather than photo-z w(θ) for three z bins: 100000 z~0.35 LRGs 600000 z~0.55 LRGs 800000 z~0.7 LRGs
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Small-scale LRG clustering SDSS2SLAQ AA
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Large-scale LRG clustering Are these BAO peaks or just some systematics?
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This is the scale where we expect to see BAO peak
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Combined w( ) results 3-D SDSS correlation function, (s) from 45000 LRGs (Eisenstein et al 2005) 2-D correlation function from 1.5 million DR5 LRGs (this work) linear no wiggle SDSS (s) fit linear no wiggle SDSS (s) fit
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“Filtered” w( ) - final result? Linear theory SDSS (s) fit But constant offset at large scales Systematics? Subtract 0.0015 from w( ) to “filter” Now agrees with linear theory But poorer agreement with SDSS (s) of Eisenstein et al
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2dFGRS BAO? So photo-z route to BAO is hard… But so is spectro-z route!
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linear no wiggle SDSS (s) fit linear no wiggle SDSS (s) fit LRG-WMAP ISW
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linear no wiggle SDSS (s) fit linear no wiggle SDSS (s) fit LRG-WMAP ISW
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LRG-WMAP Ka-band ISW?
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LRG-WMAP K-band ISW?
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LRG-WMAP Q-band ISW?
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LRG-WMAP V-band ISW?
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LRG-WMAP W-band ISW?
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LRG-WMAP ILC ISW? ILC SDSS 2SLAQ AA
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AA LRG clusters +WMAP W SZ? 10x the negative amplitude seen in ISW- LRG plot Possible SZ detection at z~0.7?
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Abell cluster + WMAP SZ WMAP SZ at 94GHz Bielby + Shanks 2007 astro-ph/ 0703407 Z=0.02 Z~0.1 Z~0.2Z~0.4 172 Abell Clusters 235 Abell Clusters38 OVRO/BIMA Clusters Coma cluster (arcmin) TT SZ effect decreases with z?
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Conclusions SDSS colour cut LRGs at z~0.35 (SDSS), z~0.55 (2SLAQ) and z~0.7 (AAOmega) Small-scale (~1Mpc) feature confirmed in w( ) - important for HOD models and LRG evolution w( ) of 1.5x10 6 SDSS LRGs close to detecting BAO - more LRGs to come from VST ATLAS Possible ISW detections at z~0.35 and z~0.55 but only anti-correlation detected at z~0.7 Possible SZ detection at small-scales at z~0.7 All results preliminary!!!
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