Observations of the p Ophiuchi cloud with the ISO/LWS and SWS

The [CII] 158 mu m, [O I] 145 mu m and 63 mu m, [Si II] 35 mu m, and H-2 nu=O-O S(3) 9.7 mu m line emission from the rho Ophiuchi dark cloud has been observed in an one-dimensional raster scan in the east-west direction by the ISO/LWS and SWS. 32 raster points with spacing of 3.3' were observed. The raster scan was centered at 16(h)26(m), -24 degrees 28' (J2000) and the scan path included the B2 V star HD147889. The results clearly demonstrate spatial variations in the lines, which can be interpreted in terms of the cloud being illuminated in the direction orthogonal to the line of sight. The line intensity ratio of [O I] 145 mu m and [O I] 63 mu m implies that at least the [O I] 63 mu m Line is optically thick.