LAUSR

By systematically searching the region of far infrared loops, we found a number of huge cavity-like dust structures at $$60\,\mu \hbox {m}$$60μm and $$100\,\mu \hbox {m}$$100μm IRIS maps. By checking these with AKARI maps ($$90\,\mu \hbox {m}$$90μm and $$140\,\mu \hbox {m}$$140μm), two new cavity-like structures (sizes $$\sim $$∼$$ 2.7\,\hbox {pc} \times 0.8\,\hbox {pc}$$2.7pc×0.8pc and $$\sim $$∼$$ 1.8\,\hbox {pc} \times 1\,\hbox {pc}$$1.8pc×1pc) located at R.A. ($$\hbox {J}2000)=14^{h}41^{m}23^{s}$$J2000)=14h41m23s and Dec. $$(\hbox {J}2000)=-64^{\circ }04^{\prime }17^{{\prime }{\prime }}$$(J2000)=-64∘04′17′′ and R.A. $$(\hbox {J}2000)=05^{h}05^{m}35^{s}$$(J2000)=05h05m35s and Dec. $$(\hbox {J}2000)=-\,69^{\circ }35^{\prime } 25^{{\prime }{\prime }}$$(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 $$3.2\pm 0.9\,\hbox {K}$$3.2±0.9K and $$4.1\pm 1.2\,\hbox {K}$$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.