X-RAY GROUPS FROM THE X-RAY GROUPS FROM THE CORE TO THE OUTSKIRTS WITH CORE TO THE OUTSKIRTS WITH CHANDRA, XMM AND SUZAKUCHANDRA, XMM AND SUZAKU

FABIO GASTALDELLO

(IASF-MILAN, UC IRVINE)

DI GESU, BUOTE, ECKERT, ETTORI, GHIZZARDI, GIACINTUCCI, GIRARDI,

HUMPHREY, ROSSETTI, ROEDIGER, DE GRANDI, MOLENDI, MATHEWS,

BRIGHENTI

OUTLINEOUTLINE

• SLOSHING COLD FRONTS IN GROUPS AND THEIR PERTURBING GALAXIES

• OUT TO THE VIRIAL RADIUS IN RXJ1159

SLOSHING CFs IN NGC 5044SLOSHING CFs IN NGC 5044

Gastaldello+09

z=0.009 kT=1.2 keV

SLOSHING CFs IN IC 1860SLOSHING CFs IN IC 1860

FG et al. in prep

z=0.022 kT=1.4 keV

SLOSHING CFs IN IC 1860SLOSHING CFs IN IC 1860

FG et al. in prep

SLOSHING CFs IN IC 1860SLOSHING CFs IN IC 1860

COMPARISON W/ SIMULATIONSCOMPARISON W/ SIMULATIONS

SLOSHING CFs IN IC 1860SLOSHING CFs IN IC 1860

SLOSHING CFs IN IC 1860SLOSHING CFs IN IC 1860

GMRT RADIO DATA AT 325 MHz. ABSENCE OF EXTENDED 1.4 GHz EMISSION AT THESE SCALES INDICATES VERY STEEP SPECTRUM.

GOING BACK TO NGC 5044 ...GOING BACK TO NGC 5044 ...

GOING BACK TO NGC 5044 ...GOING BACK TO NGC 5044 ...

GOING BACK TO NGC 5044 ...GOING BACK TO NGC 5044 ...

cz = 2733 km/s

cz = 1658 km/s

SLOSHING CFs IN IC 1860SLOSHING CFs IN IC 1860

cz = 6866 km/s

IC 1860 cz = 5966 km/s

IC 1859

SLOSHING CFs IN NGC 5846SLOSHING CFs IN NGC 5846

Machacek+11

NGC 5850: HIGH SPEED NGC 5850: HIGH SPEED ENCOUNTER WITH NGC 5846 ?ENCOUNTER WITH NGC 5846 ?

Higdon+98

NICE TARGETS FOR ASTRO-H !NICE TARGETS FOR ASTRO-H !

CLUSTERS OUTSKIRTS: ???CLUSTERS OUTSKIRTS: ???

WALKER+12

• WELL BEHAVED ? (A2204, REIPRICH+09)

• CLUMPY ? (SIMIONESCU+11)

• WEAKENING OF ACCRETION SHOCK ? (CAVALIERE+11)

OUT TO ROUT TO RVIRVIR IN THE FOSSIL IN THE FOSSIL GROUP RXJ1159GROUP RXJ1159

HUMPHREY+12

OUT TO ROUT TO RVIRVIR IN RXJ1159 IN RXJ1159

HUMPHREY+12

OUT TO ROUT TO RVIRVIR IN RXJ1159 IN RXJ1159

HUMPHREY+12

OUT TO ROUT TO RVIRVIR IN RXJ1159 IN RXJ1159

HUMPHREY+12

OUT TO ROUT TO RVIRVIR IN RXJ1159 IN RXJ1159

HUMPHREY+12

IN THE FUTURE ...IN THE FUTURE ...

Galactic/ local

CXB

YOU NEED TO MAXIMIZE GRASP/BKG (ETTORI & MOLENDI 11)

E-ROSITA … MAJOR STEP FORWARD WITH WFXT

SUMMARYSUMMARY

• COLD FRONTS IN RELAXED GROUPS ARE PROBABLY PROVIDING THE BEST EVIDENCE OF THE SLOSHING SCENARIO. THEY ARE NICE TARGETS FOR ASTRO-H

• IT IS FEASIBLE TO REACH THE VIRIAL RADIUS ALSO IN GROUPS7POOR CLUSTER. THE SITUATION WILL IMPROVE WITH FUTURE OBSERVATORIES WITH GREATER VALUES OF THE FACTOR GRASP/BACKGROUND LIKE E-ROSITA AND PARTICULARLY CONCEPTS LIKE WFXT.