Interaction of a Supernova Remnant with a Pulsar Wind Bubble

(4/4/1) Download: Postscript or a tarfile of the latex and eps files

vel2h: Click on image to view an MPEG of this simulation.

Initial Parameters:

• age = 2,270 yrs
• SSDW radius = 3e19 cm
• bubble radius = 1.5e19 cm
• SSDW shock velocity = 2.8e8 cm/s
• SSDW forward shock pressure = 2.6e-8
• bubble pressure = 1.55e-8
• bubble sound speed = 1.1e9 cm/s

The initial evolution is marked by rapid expansion of the pulsar bubble into the unshocked ejecta, including expansion of the bubble shell and growth of RT instabilities on the inside edge.

Three time slices from the 2D run showing (1) the reverse shock heading in through the bubble, (2) the crushing of the bubble (the initial shock has bounced around the interior of the bubble a few times already), and (3) a weak bounce shock created by all the ejecta crashing into the center.

These images are from a time of about 40,000 yrs. The width of one box is 6e19 cm, i.e., the bubble has been crushed to a radius of about 4e19 cm. The outer blastwave is at a radius of 1.6e20 cm. At this point there is still good separation of the gasses (but that changes quickly after this). Because of the symmetry in the problem, the bubble is being "squirted" out at a 45 degree angle. The pressure difference between the crushed bubble (green/yellow) and the surrounding ejecta (blue/purple) is only a factor of two.

Download PS file of Dargan's draft paper.