ALMA observations of layered structures due to CO selective dissociation in the $\rho$ Ophiuchi A plane-parallel PDR

M. Yamagishi, C. Hara, R. Kawabe +7

We analyze ${}^{12}$CO($J$=2-1), ${}^{13}$CO($J$=2-1), C${}^{18}$O ($J$=2-1), and 1.3 mm continuum maps of the $\rho$ Ophiuchi A photo-dissociation region (PDR) obtained with ALMA. Layered…