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Galaxy Galaxy Lensing in CLASH clusters

Galaxy Galaxy Lensing in CLASH clusters. Elinor Medezinski Johns Hopkins University. Galaxy-Galaxy Lensing. Dynamical methods work well within optical radius r < 20 kpc Galaxy-Galaxy lensing is a unique method to probe galaxy Dark Matter Halos out to large radii

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Galaxy Galaxy Lensing in CLASH clusters

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  1. Galaxy Galaxy Lensing in CLASH clusters Elinor Medezinski Johns Hopkins University

  2. Galaxy-Galaxy Lensing Dynamical methods work well within optical radius r < 20 kpc Galaxy-Galaxy lensing is a unique method to probe galaxy Dark Matter Halos out to large radii 100 h-1kpc ~ 200 h-1kpc Stacking background galaxies inside aperture around cluster galaxy gives mass of galaxy lens Averaging over many cluster galaxies within cluster annulus averages out cluster contribution One can then deduce: M/L ratios of galaxies Truncation of galaxies in different part of clusters E. Medezinski - CLASH team meeting

  3. B-R vs. R-z’ selected samples E. Medezinski - CLASH team meeting

  4. Truncated Singular Isothermal Sphere (TSIS) density profile E. Medezinski - CLASH team meeting

  5. MCMC analysis Marginalize over parameter space to find best-fit V,Rt,, Exclude inner 20-30 kpc/h from fit E. Medezinski - CLASH team meeting

  6. MACSJ1206 MCMC results 0.1Rvir<R<0.6Rvir 0.6Rvir<R<1.1Rvir 1.1Rvir<R<1.8Rvir 1.8Rvir<R<2.8Rvir E. Medezinski - CLASH team meeting

  7. Halo properties vs. Cluster radius – MACSJ1206 Exclude inner cluster core where strong contribution from cluster lensing Halo truncated outside R>Rvir Mass Luminosity M/L Truncation radius galaxy type E. Medezinski - CLASH team meeting

  8. Use specstroscopic redshifts to reliably select a subsample of cluster galaxies. Two main clouds – red and blue clustergalaxies Spec-z selected samples E. Medezinski - CLASH team meeting

  9. Red galaxies clustered, blue galaxies not clustered – do they belong to the cluster? Number density profiles E. Medezinski - CLASH team meeting

  10. Red cluster g-g Mass Luminosity M/L Truncation radius galaxy type E. Medezinski - CLASH team meeting

  11. Blue cluster (?) g-g Mass Luminosity M/L Truncation radius galaxy type E. Medezinski - CLASH team meeting

  12. A2261 Results – CC selected sample Mass Luminosity M/L Truncation radius galaxy type E. Medezinski - CLASH team meeting

  13. A2261 BVR from Subaru, i'z' from KPNO – shallow. Red cl. Blue cl. Mass Luminosity Luminosity Mass M/L M/L Truncation radius galaxy type galaxy type Truncation radius E. Medezinski - CLASH team meeting

  14. A383 Problems – not as deep (old reduction of Mario) l.o.s stuctures, cluster substructure No spec-z's redshifts of cluster galaxies E. Medezinski - CLASH team meeting

  15. A370 ZwCl0024 Natarajan et al. 2009 E. Medezinski - CLASH team meeting

  16. Next steps More clusters with more spectro-selected cluster galaxies Use 2D multi-halo model to subtract cluster lensing contribution Incorporate HST shapes in centeral bins Try other galaxy mass models? NFW? Stack several clusters for better statistics Divide by stellar mass, local density, type etc. to get information on the galactic halo in different enviroments E. Medezinski - CLASH team meeting

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