Mg₂SiO₄ test particle trajectory, size, and velocity in the ejecta of SNR N49. Green and red lines indicate particles initially placed at one-forth and half of the radius of the ejecta, respectively. The initial size of particles is 10, 100, and 1000 nm for dotted, solid and dashed lines, respectively. In the top panel, black lines indicate the positions of forward and reverse shock, and the blue line is the boundary between the ejecta and the ISM.