Substructure and dynamics of X-ray clusters of galaxies Gayoung Chon - - PowerPoint PPT Presentation

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Substructure and dynamics of X-ray clusters of galaxies Gayoung Chon - - PowerPoint PPT Presentation

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Substructure and dynamics of X-ray clusters of galaxies Gayoung Chon @ MPE with Hans Bhringer Based on Chon, Bhringer (2012, 2015) Gayoung Chon X-ray clusters to cosmology X-ray observations can characterise structure of clusters

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Gayoung ¡Chon ¡

Substructure and dynamics of X-ray clusters of galaxies

Gayoung Chon @ MPE

with Hans Böhringer

Based on Chon, Böhringer (2012, 2015)

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Gayoung ¡Chon ¡

X-ray clusters to cosmology

15 VI 2015

  • X-ray observations can characterise structure of clusters
  • Mass of a cluster usually determined based on HSE and spherical

symmetry

  • Dynamically young objects à challenge to determine mass
  • Accurate mass determination important for cosmology
  • Currently sorting clusters by degree of substructure à diff. methods

to get mass

  • Extra info. to gain insight into physics

ICM workshop @ MPA 2

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Gayoung ¡Chon ¡

Observables to mass conversion

15 VI 2015 3 ICM workshop @ MPA

Reiprich & Böhringer (2002) Pratt, Böhringer et al. (2009)

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Gayoung ¡Chon ¡

REFLEX II cosmology : Influence of scaling relations

15 VI 2015 4 ICM workshop @ MPA

Böhringer, Chon, Collins (2013)

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Gayoung ¡Chon ¡ 15 VI 2015

Böhringer+ 2009

5

REXCESS Clusters

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Gayoung ¡Chon ¡

Diagnostic tools

15 VI 2015

Centroid shift Power ratios Buote & Tsai 95, 96

ICM workshop @ MPA 6

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Gayoung ¡Chon ¡

Large P3

15 VI 2015 ICM workshop @ MPA 7

Böhringer+ 2010

Simulation by Borgani+ 2004

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Gayoung ¡Chon ¡

  • Diagnostics

Centroid shift Power ratios – higher moments, Pm/P0 = Pm

  • Application

REFLEX sub-sample

  • Lx/E(z)2.7 > 4.1e44 erg/s, z=0.15-0.3, nH < 7e20 cm2
  • 35 clusters in total with deep XMM observations

To study morphology

15 VI 2015 ICM workshop @ MPA 8

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Gayoung ¡Chon ¡

w – P3

15 VI 2015 ICM workshop @ MPA 9

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Gayoung ¡Chon ¡

P2 – ε

15 VI 2015 ICM workshop @ MPA 10

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Gayoung ¡Chon ¡

Luminosity ratio vs. luminosity

15 VI 2015 ICM workshop @ MPA 11

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Gayoung ¡Chon ¡

w/P3 – luminosity ratio

15 VI 2015 ICM workshop @ MPA 12

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Gayoung ¡Chon ¡

Magnitude gap – P3

15 VI 2015 ICM workshop @ MPA 13

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Gayoung ¡Chon ¡

LX – T

15 VI 2015 ICM workshop @ MPA 14

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Gayoung ¡Chon ¡

M500 – T

15 VI 2015 ICM workshop @ MPA 15

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Gayoung ¡Chon ¡

Mass ratio – weak lensing mass

15 VI 2015 ICM workshop @ MPA 16

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Gayoung ¡Chon ¡

Observations vs. simulations

15 VI 2015 ICM workshop @ MPA 17

Böhringer+ 2010

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Gayoung ¡Chon ¡

Evolution of substructure ?

15 VI 2015

Weimann, Böhringer, Chon (2013)

ICM workshop @ MPA 18

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Gayoung ¡Chon ¡

Large XMM-Newton

XMM-Newton project ( P .I. H. Böhringer )

Volume-limited Sample of REFLEX II

constraints : z < 0.1 and Lx > 5e43 erg/s

REFLEX II-XMM-Newton

15 VI 2015 ICM workshop @ MPA 19

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Gayoung ¡Chon ¡

RXCJ2359-6042 – “cool bullet cluster”

15 VI 2015 ICM workshop @ MPA 20

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Gayoung ¡Chon ¡

Bullet component

15 VI 2015 ICM workshop @ MPA 21

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Gayoung ¡Chon ¡

Tracing history

15 VI 2015

region T (keV) Z¤

¤

CC 1.55 ± 0.10 0.75 ± 0.19 cluster

  • cc

3.12 ± 0.13 0.17 ± 4e-2 b1 3.54 ± 0.26 0.18 ± 9e-2 b2-cc 3.08 ± 0.12 0.27 ± 8e-2 b3 3.54 ± 0.22 0.18 ± 7e-2 shock (n+s) 4.5 ± 0.59 0.35 ± 0.22

ICM workshop @ MPA 22

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Gayoung ¡Chon ¡

X-ray substructure analysis

morphological classification reflecting dynamical states degree of substructure influences scaling relations for physical interpretation, can separate relaxed vs. un-relaxed

  • bservation vs. simulations: substructure frequency

evolution

Still need …

better data @ high-z larger statistical sample à REFLEX-XMM

Summary

15 VI 2015 ICM workshop @ MPA 23