Transitional disks around the Herbig Ae/Be stars are fascinating targets in the contexts of disk evolution and also planet formation .
Oph IRS 48 is one of such Herbig Ae stars , which shows an inner dust cavity and azimuthally lopsided large dust distribution .
We present new images of Oph IRS 48 at eight mid-infrared ( MIR ) wavelengths from 8.59 to 24.6 \mu { m } taken with the COMICS mounted on the 8.2 m Subaru Telescope .
The N-band ( 7 to 13 \mu { m } ) images show that the flux distribution is centrally peaked with a slight spatial extent , while the Q-band ( 17 to 25 \mu { m } ) images show asymmetric double peaks ( east and west ) .
Using 18.8 and 24.6 \mu m images , we derived the dust temperature at both east and west peaks to be 135 \pm 22 K. Thus , the asymmetry may not be attributed to a difference in the temperature .
Comparing our results with previous modeling works , we conclude that the inner disk is aligned to the outer disk .
A shadow casted by the optically thick inner disk has a great influence on the morphology of MIR thermal emission from the outer disk .