NANTEN observations of dense cores in the Corona Australis molecular cloud

We carried out a (CO)-O-18 survey for dense molecular cores in the Corona Australia (CrA) molecular cloud with the NANTEN telescope. We observed 2.2 deg(2) at a 2' grid spacing with a 2.'7 beam; and 1980 positions were observed. We identified 8 (CO)-O-18 cores; whose typical line width, average column density, radius, mass, and average number density were 0.66 km s(-1), 1.1 x 10(22) Cm-2, 0.13 PC, 18M.; and 1.4 x 10(4) cm(-3), respectively. We found that Delta V-comp, (N(H-2)), R, M, and n(H-2) become larger along with an increase in the star-formation activity, whereas the ratio ,M-vir/M becomes smaller. A comparison of the present cores with those in Chamaeleon, Lupus, Ophiuchus, Taurus, and L 1333 indicates that star-forming cores tend to have a high column density, as well as a smaller M-vir/M ratio.