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

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Presentation on theme: "BAO,ISW+SZ from AA  +SDSS Utane Sawangwit, Tom Shanks, Durham University + 2SLAQ + AAOmega teams."— Presentation transcript:

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

2 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!!!!

3 2SLAQ LRG Wedge Plot

4 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

5 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

6 Small-scale LRG clustering SDSS2SLAQ AA 

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

8 This is the scale where we expect to see BAO peak

9 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

10 “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

11 2dFGRS BAO? So photo-z route to BAO is hard… But so is spectro-z route!

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

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

14 LRG-WMAP Ka-band ISW?

15 LRG-WMAP K-band ISW?

16 LRG-WMAP Q-band ISW?

17 LRG-WMAP V-band ISW?

18 LRG-WMAP W-band ISW?

19 LRG-WMAP ILC ISW? ILC SDSS 2SLAQ AA 

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

21 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)  TT SZ effect decreases with z?

22 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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