Four CO outflows and dense gas in the dark cloud complex near IC 5146

Details Four CO outflows and dense gas in the dark cloud complex near IC 5146 Four CO outflows and dense gas in the dark cloud complex near IC 5146

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105.1487d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 105, no. 4, p. 1487-1494.

Astronomy and Astrophysics

Astronomy

18

Carbon Monoxide, Gas Flow, Interstellar Gas, Mass Distribution, Molecular Clouds, Velocity Distribution, Carbon Isotopes, Density (Number/Volume), Imagery, Radio Astronomy

Scientific paper

We report an outflow survey carried out in the dark cloud complex near IC5146 open cluster using the (C-12)O(J = 1-0) emission line. An area of about 130 sq arcmin was searched for outflows, corresponding to 17 percent of the extent of the (C-13)O cloud and 40 percent of that of the C(O-18) cloud. Four regions exhibiting high velocity CO wings were newly found, and each of them is associated with IRAS point sources. C(O-18)(J = 1-0) observations were also made; the outflow sources are found to be surrounded by the dense gas which mean molecular number density is about 1 X 10 exp 3/cu cm, although they tend to be located in the less dense parts of the C(O-18) cloud, not toward the C(O-18) peaks. The C(O-18) cloud has a molecular mass of about 1600 solar masses. The FIR luminosities of the protostar candidates in the IC5146 region are considerably greater than those in Taurus; these comparisons indicate that the IC5146 region is characterized by a higher mass star formation and larger velocity dispersion than the Taurus cloud complex.

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