Physics
Scientific paper
Feb 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000sccha..43..217s&link_type=abstract
Science in China, Series A, Vol. 43, No. 2, p. 217 - 224
Physics
Planetary Nebulae: Emission Lines
Scientific paper
The authors report the results of CO(1-0) (J = 1-0) observations for 20 selected planetary nebulae (PNe), using the 13.7 m radio telescope of Purple Mountain Observatory at the Qinghai station. Due to weak CO(1-0) emission, long integrated time observations have been carried out for most of sampled PNe. Among these, nine are first detections in CO(1-0) namely NGC 6445, M1-59, M4-9, M2-51, M4-18, He2-459, Sh2-71, K3-31, M2-52, and one is the first possible detection, V-V1-8, a probably misclassified PN.
Sun Jin
Sun Yanchun
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