Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apjs...77..647n&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 77, Dec. 1991, p. 647-675.
Astronomy and Astrophysics
Astronomy
79
Carbon Monoxide, Interstellar Gas, Molecular Clouds, Ophiuchi Clouds, Infrared Astronomy Satellite, Nebulae, Star Formation
Scientific paper
Results are presented of a survey of (C-13)O cloud cores in the Ophiuchus region in the north of the Rho Oph molecular cloud core by using results of a (C-12)O unbiased survey as a guide. Twenty-three (C-13)O clouds and 51 (C-13)O cores are identified. The total mass of the (C-13)O clouds is estimated to be 2000-6000 solar masses, and the typical densities of the (C-13)O cores are around 3000/cu cm. Lists of the physical parameters such as size, mass, average density, etc. are presented for all the (C-13)O clouds and cores. The mass spectrum of the (C-13)O cores is well fitted by a power law with an index value of about 1.7, similar to those published so far for the other cloud cores. The (C-13)O clouds do not exhibit a sign of active star formation; only about 10 young stellar objects are associated with the (C-13)O clouds as a whole. There are 13 promising candidates for young stellar objects formed in the cloud complex. The upper limit of the star formation efficiency is estimated at 0.3 percent.
Fukui Yasuo
Mizuno Akira
Nozawa Satoshi
Ogawa Hideo
Teshima Yoshiro
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