New C18O (1-0) emission of massive young stellar objects

Details New C18O (1-0) emission of massive young stellar objects New C18O (1-0) emission of massive young stellar objects

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002acasn..43...33z&link_type=abstract

Acta Astronomica Sinica, vol.43, no.1, p. 33-40

Astronomy and Astrophysics

Astronomy

2

Molecular Cloud, C18O (1-0) Emission, Intensity Ratio, Massive Star Formation

Scientific paper

Observations of C18O (1-0) line emission toward 74 massive young stellar objects (YSOs) or its candidates were carried out by using the 13.7m millimeter wave telescope of Purple Mountain Observatory at the Qinghai Station. 63 observed objects show the C18O (1-0) emission. 57 of them were first detected in C18O (1-0) lines. According to the line radiation temperature (TR*) and the line half width (? V), the C18O(1-0) optical depths and C18O column densities were derived for all with LTE method. Besides, we discussed the line intensity ratio and integral intensity ratio for 13CO(1-0) and C18O (1-0).

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