BAO,ISW+SZ from AA  +SDSS Utane Sawangwit, Tom Shanks, Durham University + 2SLAQ + AAOmega teams.

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Presentation transcript:

BAO,ISW+SZ from AA  +SDSS Utane Sawangwit, Tom Shanks, Durham University + 2SLAQ + AAOmega teams

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!!!!

2SLAQ LRG Wedge Plot

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

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: z~0.35 LRGs z~0.55 LRGs z~0.7 LRGs

Small-scale LRG clustering SDSS2SLAQ AA 

Large-scale LRG clustering Are these BAO peaks or just some systematics?

This is the scale where we expect to see BAO peak

Combined w(  ) results 3-D SDSS correlation function,  (s) from 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

“Filtered” w(  ) - final result? Linear theory SDSS  (s) fit But constant offset at large scales Systematics? Subtract from w(  ) to “filter” Now agrees with linear theory But poorer agreement with SDSS  (s) of Eisenstein et al

2dFGRS BAO? So photo-z route to BAO is hard… But so is spectro-z route!

linear no wiggle SDSS  (s) fit linear no wiggle SDSS  (s) fit LRG-WMAP ISW

linear no wiggle SDSS  (s) fit linear no wiggle SDSS  (s) fit LRG-WMAP ISW

LRG-WMAP Ka-band ISW?

LRG-WMAP K-band ISW?

LRG-WMAP Q-band ISW?

LRG-WMAP V-band ISW?

LRG-WMAP W-band ISW?

LRG-WMAP ILC ISW? ILC SDSS 2SLAQ AA 

AA  LRG clusters +WMAP W  SZ? 10x the negative amplitude seen in ISW- LRG plot Possible SZ detection at z~0.7?

Abell cluster + WMAP  SZ WMAP SZ at 94GHz Bielby + Shanks 2007 astro-ph/ Z=0.02 Z~0.1 Z~0.2Z~ Abell Clusters 235 Abell Clusters38 OVRO/BIMA Clusters Coma cluster  (arcmin)  TT SZ effect decreases with z?

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!!!