NANTEN Observations of Dense Cores in the Corona Australis Molecular Cloud

Details NANTEN Observations of Dense Cores in the Corona Australis Molecular Cloud NANTEN Observations of Dense Cores in the Corona Australis Molecular Cloud

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pasj...51..911y&link_type=abstract

Publications of the Astronomical Society of Japan, v.51, p.911-918.

Astronomy and Astrophysics

Astronomy

10

Ism: Clouds, Ism: Individual (Corona Australis Cloud), Ism: Molecules, Stars: Formation, Radio Lines: Ism

Scientific paper

We carried out a C18O survey for dense molecular cores in the Corona Australis (CrA) molecular cloud with the NANTEN telescope. We observed 2.2 deg2 at a 2' grid spacing with a 2.'7 beam, and 1980 positions were observed. We identified 8 C18O cores, whose typical line width, average column density, radius, mass, and average number density were 0.66 km s-1, 1.1times 1022 cm-2, 0.13 pc, 18 MO , and 1.4 x 104 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.

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