Dust color temperature distribution of two FIR cavities at IRIS and AKARI maps

Abstract

By systematically searching the region of far infrared loops, we found a number of huge cavity-like dust structures at 60μm and 100μm IRIS maps. By checking these with AKARI maps (90μm and 140μm), two new cavity-like structures (sizes ∼2.7pc×0.8pc and ∼1.8pc×1pc) located at R.A. (J2000)=14h41m23s and Dec. (J2000)=-64∘04'17'' and R.A. (J2000)=05h05m35s and Dec. (J2000)=-69∘35'25'' were selected for the study. The difference in the average dust color temperatures calculated using IRIS and AKARI maps of the cavity candidates were found to be 3.2±0.9K and 4.1±1.2K, respectively. Interestingly, the longer wavelength AKARI map gives larger values of dust color temperature than that of the shorter wavelength IRIS maps. Possible explanation of the results will be presented.