Table 1: Properties of the initial disk galaxy model.

Component	Mass1	Radius2	No. of particles
disk	0.34	18.0	20 000
stars	0.27		16 000
clouds	0.07		4000
bulge	0.17	4.0	10 000
DM halo	1.94	87.9	-
hot gas	0.01	25.	5000
total	2.47		35 000

¹ In units of , ² in kpc.