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Clustering properties of normal and active galaxies at z~3 Harold Francke, PUC Postdoctoral Fellow (Leopoldo Infante) Thesis Adv.: Eric Gawiser (Rutgers),

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Presentation on theme: "Clustering properties of normal and active galaxies at z~3 Harold Francke, PUC Postdoctoral Fellow (Leopoldo Infante) Thesis Adv.: Eric Gawiser (Rutgers),"— Presentation transcript:

1 Clustering properties of normal and active galaxies at z~3 Harold Francke, PUC Postdoctoral Fellow (Leopoldo Infante) Thesis Adv.: Eric Gawiser (Rutgers), Paulina Lira (UCh.)

2 Outline Introduction Basic Methodology Dataset Galaxy Selection & Confirmation Results Conclusions

3 Introduction Aim of thesis: Clustering properties of “normal” vs. active galaxies at z=3 Clustering  Intrinsic properties of Dark Matter halos Galaxies and SMBHs seem to evolve together  AGN feedback z = 3, universe was young, only 2 Gyr old  Near peak of AGN activity  Galaxies: young, just being formed

4 Basic tool: two-point correlation function  P=n 2 (1 +  (  12 ))d  1 d  2 (in 2D) Excess probability of finding two points separated by 

5 The Bias Factor The proportionality constant between correlation functions of halos and dark matter ObservedFrom theory From theory/simulations

6 Bias Factor Evolution 5x10 9 M  1.6x10 12 M  1.4x10 11 M  6x10 11 M  1x10 10 M  5x10 10 M  2.8x10 12 M  1.7x10 14 M  Considering the grow of structure …

7 MUSYC Dataset Optical and NIR photometry, 4 fields, 30’x30’ each. Spectroscopy: Magellan+IMACS, >500 with spec ID so far ECDF-S has unique 250ks Chandra data Field # Obj. UBVRIzJHKNB5000 X-Ray [erg/(s cm^2)] E-CDFS8441026.026.926.4 24.623.624.323.823.425.52x10 -16 SDSS 1030+056961925.826.026.226.025.423.724.123.923.324.88x10 -16 Cast1255+016034426.026.226.126.025.024.124.022.823.024.4 E-HDFS6296826.026.126.025.824.723.624.323.4 24.1 10x10 deep fields

8 Broad-band selection Lyman Break Galaxies (LBG) Galaxies with their Lyman break (restframe 912Å) between U and V at z~3. Selected by UVR color + R<25.5 1388 candidates in ECDF-S, 4147 in full MUSYC

9 Active Galactic Nuclei (AGN) X-Ray detection + LBG selection  59 “XUVR” candidates in ECDF-S Lx ~ 10 43 - 10 45 erg/s AGN frac = 2  1%

10 U B NB5000 VR Narrow-band sel.: Lyman  Emitters (LAE) Sample of 162 LAEs, for more details, see: Gronwall et al 2007, ApJ 667, 79

11 Spectroscopic confirmations Confirmed objects: 137 LBG 28 high-z AGN 84 LAE Angular  (  ) to Spatial  (r) deprojection

12 Dark Matter halo properties Bias factorLog(M min )n halo AGN 5.5  2.0 12.6 +0.5 -0.8 10 -3 -- 10 -6 LBG 3.5  0.311.8  0.159  4 x10 -4 LAE 1.9  0.4 10.8 +0.5 -0.9 3 +27 -2 x10 -2

13 LBG halos end up in ellipticals at z=0, AGN in big elliptical or poor clusters z=3.1 LAEs have the lowest masses!! Could be progenitors of L* galaxies at z=0 Descendants of LBGs, AGN and LAEs

14 Distribution of descendants at z=0 in terms of halo mass… LAE LBG AGN M(L*)

15 Summary/Conclusions New “XUVR” method for high-z AGN selection, applicable to future, wide-field (x-ray) surveys with minimal spectroscopy Intermediate luminosity AGN cluster somewhat more strongly than LBG with similar colors Confirm results that LBG are progenitors of elliptical galaxies at z=0, while “XUVR” AGN about 1 order of magnitude more massive. LAEs show fairly weak clustering at z=3.1, and appear to be progenitors of many of today’s L* galaxies

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