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STUDY SCALING RELATION AND THEIR SCATTER

TWO CASES OF EXTREME MERGERS. STUDY SCALING RELATION AND THEIR SCATTER. Elena Rasia, Chandra Fellow Department of Physic,University of Michigan. IN COLLABORATION WITH

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STUDY SCALING RELATION AND THEIR SCATTER

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  1. TWO CASES OF EXTREME MERGERS STUDY SCALING RELATION AND THEIR SCATTER Elena Rasia, Chandra Fellow Department of Physic,University of Michigan IN COLLABORATION WITH MAXIM MARKEVITCH (CFA), KLAUS DOLAG(MPA), PASQUALE MAZZOTTA (CFA, UNIVERSITY OF ROME), MASSIMO MENEGHETTI (OBSERVATORY OF BOLOGNA) NY, Columbia University

  2. SCALING RELATIONS by Kravtsov et al 06 Mtot = 1014.41 (TX/3 keV)1.521 1014.35 (Mgas/2 1013)0.921 1014.27 (YX/4 1013)0.581 Yx=Mgas TX all clusters [7101321015]Msun/h all z (=0,0.6) All quantities at R500 excluding 0.15 R500 NY, Columbia University

  3. SIMULATIONS ONE SPECIAL CLUSTER • Physics: radiative cooling,uniform time-dependent UV background, star formation from multi-phase interstellar medium, galactic winds powered by SN Mass resolution: DM particle = 1.74 108 Msun/h GAS particle =2.6 107 Msun/h; Physical resolution: softening 2.5 kpc/h;Total mass at R200: M200= 2 1015 Msun/h Active dynamic history and strong merging (Mach number 2.5),merging mass ratio 1:10 ONE STRONG MERGER 1 million particles inside R200, merging mass ratio 1:1 NY, Columbia University

  4. THE SPECIAL CASE (BULLET-LIKE) DM GAS By Klaus Dolag galaxies NY, Columbia University

  5. X-ray Map SimulatorRasia et al. 07 Gardini et al. 04 Chandra or XMM-Newton event files as output Hydrodynamical simulations as input… NY, Columbia University

  6. THE 1:1 MERGER CASE z=0.2975 z=0.0945 z=0.1 Time denoted by a star in the plots NY, Columbia University

  7. SIMULATION All the quantities (Tsl, Mgas, YX=Tsl Mgas)computed inside R500 (excluding 0.15 R500) with R500 determined from the simulation itself OBSERVATION Cluster processed through XMAS2 to obtained X-ray images Mask blobs All the quantities from X-ray measurements computed in R500 (excluding the core) estimated from X-ray. SCALING RELATION NY, Columbia University

  8. 1.Merger begins Evolution intrinsic properties 2. centers coincide DM bullet-like+ cold blob Exiting R500 TEMP 3. cold blob 1.Merger begins M GAS 2. centers coincide TEMP M TOT NY, Columbia University

  9. Red lines are the relations proposed by Kravtsov et al 06 + their scatter SCALING RELATION FROM SIMULATIONS Z A Z Z A A M-Tsl M-Yx M-Mgas Mgas 11% scatter NY, Columbia University Scatter 20 %, 15%, 8%

  10. SIMULATION All the quantities (Tsl, Mgas, YX=Tsl Mgas)computed inside R500 (excluding 0.15 R500) with R500 determined from the simulation itself OBSERVATION Cluster processed through XMAS2 to obtained X-ray images Mask blobs All the quantities from X-ray measurements computed in R500 (excluding the core) estimated from X-ray. SCALING RELATION NY, Columbia University

  11. TEMPERATURE • Mask blobs • Spectra: [0.5 7] keV, fitting with one single-temperature mekal model (free parameters: T, Z and K) • First measure at R500 computed directly from simulation NY, Columbia University

  12. S-B AND GAS DENSITY • Surface brightness profile: [0.5 2] keV images • Gas density fitting formulae: n2{(r/rc)a[1+(r/rc1)2](a/2-3b1)[1+(r/rs)g]e/g} + m2{[1+(r/rc2)2 ]3b2/2 } (Vikhlinin et al. 05) • With the gas mass profile we calculate R500 as the radius that satisfy at 4 /3 500 c(z) r3500 = 1014.27 E(z) 2/5 [YX(R500)]0.581 (Kravtsov et al. 06 ) NY, Columbia University

  13. MASS - TEMPERATURE Bullet-like 1:1 The overall behavior of the bullet-like M-T is changed substantially. Points are closer to the relation by Kravtsov et al. and within 10% of scatter NY, Columbia University

  14. MASS - GAS MASS 1:1 Bullet-like There is a larger spread in the gas mass computed with the X-ray technique, at the same time more points approach to the best-fit by Kravtsov NY, Columbia University

  15. MASS - YX PARAMETER Bullet-like 1:1 The observed Yx parameter is in agreement with Kravtsov relation. The “observed scatter” is substantially reduced NY, Columbia University

  16. CONLUSION 1: We test the robustness of the scaling relation and we find that they are satisfied also in the case of a strong merger NY, Columbia University

  17. CONLUSION 1: We test the robustness of the scaling relation and we find that they are satisfied also in the case of a strong merger NY, Columbia University

  18. CONLUSION 1: We test the robustness of the scaling relation and we find that they are satisfied also in the case of a strong merger NY, Columbia University

  19. CONLUSION 1: We test the robustness of the scaling relation and we find that they are satisfied also in the case of a strong merger NY, Columbia University

  20. CONCLUSION 2: The X-ray Temperature is good proxy for mass when an accurate masking is done NY, Columbia University

  21. CONCLUSION 2: The X-ray Temperature is good proxy for mass when an accurate masking is done NY, Columbia University

  22. CONCLUSION 2: The X-ray Temperature is good proxy for mass when an accurate masking is done NY, Columbia University

  23. CONCLUSION 3: Mgas and YX parameter are very robust NY, Columbia University

  24. CONCLUSION 3: Mgas and YX parameter are very robust NY, Columbia University

  25. CONCLUSION 3: Mgas and YX parameter are very robust NY, Columbia University

  26. THE PHOTON IMAGES OF150 CLUSTERS FROM BORGANI ET AL. 04 WILL BE SOON PUBBLIC AVAILABLE IN THE ITALIAN VIRTUAL OBSERVATORY (ITVO) NY, Columbia University

  27. THE PHOTON IMAGES OF150 CLUSTERS FROM BORGANI ET AL. 04 WILL BE SOON PUBBLIC AVAILABLE IN THE ITALIAN VIRTUAL OBSERVATORY (ITVO) NY, Columbia University

  28. THE PHOTON IMAGES OF150 CLUSTERS FROM BORGANI ET AL. 04 WILL BE SOON PUBBLIC AVAILABLE IN THE ITALIAN VIRTUAL OBSERVATORY (ITVO) NY, Columbia University

  29. THE PHOTON IMAGES OF150 CLUSTERS FROM BORGANI ET AL. 04 WILL BE SOON PUBBLIC AVAILABLE IN THE ITALIAN VIRTUAL OBSERVATORY (ITVO) NY, Columbia University

  30. THE PHOTON IMAGES OF150 CLUSTERS FROM BORGANI ET AL. 04 WILL BE SOON PUBBLIC AVAILABLE IN THE ITALIAN VIRTUAL OBSERVATORY (ITVO) NY, Columbia University

  31. THE PHOTON IMAGES OF150 CLUSTERS FROM BORGANI ET AL. 04 WILL BE SOON PUBBLIC AVAILABLE IN THE ITALIAN VIRTUAL OBSERVATORY (ITVO) NY, Columbia University

  32. THE PHOTON IMAGES OF150 CLUSTERS FROM BORGANI ET AL. 04 WILL BE SOON PUBBLIC AVAILABLE IN THE ITALIAN VIRTUAL OBSERVATORY (ITVO) NY, Columbia University

  33. THE PHOTON IMAGES OF150 CLUSTERS FROM BORGANI ET AL. 04 WILL BE SOON PUBBLIC AVAILABLE IN THE ITALIAN VIRTUAL OBSERVATORY (ITVO) NY, Columbia University

  34. THE PHOTON IMAGES OF150 CLUSTERS FROM BORGANI ET AL. 04 WILL BE SOON PUBBLIC AVAILABLE IN THE ITALIAN VIRTUAL OBSERVATORY (ITVO) NY, Columbia University

  35. M-Yx relation using Borgani et al. 04 clusters. Cyan points indicate relaxed systems or object with a good spectroscopic determination NY, Columbia University

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