A study of four low-latitude (${\mid } l{\mid }<10^{\circ }$) far-infrared cavities

Abstract

We present dust color temperature, dust mass, planck function and visual extinction distributions in the four low-latitude ($\mid l\mid <10^{\circ }$) far-infrared cavities namely FIC01+55, FIC05+28, FIC06−05 and FIC06−01 which are found to be located within 0.5$^{\circ }$ far-infrared loops G128−03, G182+00, G212−11 and G214−01, respectively. These cavities are located within $3^{\circ }$ of AGB stars ABG01+55, AGB05+28, AGB06−05 and PAGB181, respectively. The dust color temperature of the core region is found to lie in the range $18.4\pm 1.2$ to $26.2\, \pm 1.7\hbox {K}$. The product of dust color temperature and visual extinction is found to be consistent. The contour maps showed that the low temperature region have greater mass density. The distribution of planck function along major and minor diameters is found to be sinusoidal, suggesting oscillation in the grain temperature distribution.