Fig. 6: Simulations of other scenarios.
From: Asymmetric eROSITA bubbles as the evidence of a circumgalactic medium wind
Density distributions and X-ray maps for the non-axisymmetric halo medium (upper, t = 19 Myr) and tilted nuclear outflow model (lower, t = 18 Myr). The grey and red lines in panels a and c represent isotherms of 3 × 106 and 4 × 106 K, respectively. The orange lines in panels b and d mark the cavities filled with the nuclear outflow. In both cases, the outlines of the eRBs appear essentially symmetric in the east–west direction. In the titled outflow model, the projected X-ray map presents a brighter substructure on the left side in the northern halo (panel d). This is due to the high-density gas being lifted up rather than just being pushed aside by the outflow (see the yellow region at Z ≃ 8 kpc in panel c). Apart from this substructure, the northern bubble is brighter on the right due to stronger compression. Note that for both models, the metallicity of the halo medium is reset to 0.2Z⊙.
