X-ray cavities and temperature jumps in the environment of the strong
  cool core cluster Abell 2390
  We present results based on the systematic analysis of high resolution 95 ks
Chandra observations of the strong cool core cluster Abell 2390 at the redshift
of z= 0.228 that hosts an energetic radio AGN. This analysis has enabled us to
investigate five X-ray deficient cavities in the atmosphere of Abell 2390
within central 30". Presence of these cavities have been confirmed through a
variety of image processing techniques like, the surface brightness profiles,
unsharp masked image, as well as 2D elliptical model subtracted residual map.
Temperature profile as well as 2D temperature map revealed structures in the
distribution of ICM, in the sense that ICM in the NW direction is cooler than
that on the SE direction. Temperature jump in all directions is evident near
25" (90.5 kpc) corresponding to the average Mach number 1.44$\pm$0.05, while
another jump from 7.47 keV to 9.10 keV at 68" (246 kpc) in the north-west
direction, corresponding to Mach number 1.22$\pm$0.06 and these jumps are
associated with the cold fronts. Tricolour map as well as hardness ratio map
detects cool gas clumps in the central 30 kpc region of temperature
$4.45_{-0.10}^{+0.16}$ keV. The entropy profile derived from the X-ray analysis
is found to fall systematically inward in a power-law fashion and exhibits a
floor near 12.20$\pm$2.54 keV cm$^2$ in the central region. This flattening of
the entropy profile in the core region confirms the intermittent heating at the
centre by AGN. The diffuse radio emission map at 1.4\,GHz using VLA L-band data
exhibits highly asymmetric morphology with an edge in the north-west direction
coinciding with the X-ray edge seen in the unsharp mask image.
