An Observational Study of the Molecular Cloud Core Toward IRAS 23133+6050

Details An Observational Study of the Molecular Cloud Core Toward IRAS 23133+6050 An Observational Study of the Molecular Cloud Core Toward IRAS 23133+6050

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cha%26a..32...33w&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 32, Issue 1, p. 33-46.

Astronomy and Astrophysics

Astrophysics

Scientific paper

This paper reports 13CO, C18O, HCO+ (J = 1-0) spectral observations toward IRAS 23133+6050 with the 13.7 m millimeter-wave telescope at Qinghai Station of PMO. Corresponding to the 13CO, C18O, HCO+ line emissions, the size of the observed molecular cloud core is 4.0 pc, 2.1 pc and 2.3 pc, the virial mass is 2.7 × 103 M&sun;, 0.9 × 103 M&sun; and 2.3 × 103 M&sun;, and the volume density of H2 is 2.7 × 103 cm-3, 5.1 × 103 cm-3 and 4.6 × 103 cm-3, respectively. Using the power-law function n(r) ˜r-p, the spatial density distribution of the cloud core was analyzed, the obtained exponent p is respectively 1.75, 1.56 and 1.48 for the 13CO, C18O and HCO+ cores, and it is found that the density distribution becomes gradually flatter from the outer region to the inner region of the core. The HCO+ abundance is 4.6 × 10-10, one order of magnitude less than the value for dark clouds, and slightly less than that for giant molecular clouds. The 13CO/C18O relative abundance ratio is 12.2, comparable with the value 11.8 for dark clouds, and the value 9.0 ˜ 15.6 for giant molecular clouds. A 13CO bipolar outflow is found in this region. The IRAS far-infrared luminosity and the virial masses give the luminosity-mass ratios 18.1, 51.1 and 21.2 from the three lines.

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