行星状星云的CO(1-0)谱线观测  

CO(1-0) Line Emission Observations of PlanetaryNebulae

作　　者：孙锦[1] 孙艳春 吕静[2] 孙金江[2] 

机构地区：[1]北京师范大学天文系 [2]中国科学院紫金山天文台青海观测站

出　　处：《天体物理学报》1998年第2期217-221,共5页

基　　金：国家自然科学基金;国家射电天文联合开放实验室资助

摘　　要：用紫金山天文台青海站的１３７ｍ射电望远镜，对１０个行星状星云给出了新的ＣＯ（１－０）谱线观测结果．其中４个行星状星云：ＮＧＣ６４４５，Ｍ１５９，Ｍ４９和Ｍ２５１，已有过ＣＯ（２１）的观测，本文第一次给出了它们的ＣＯ（１０）的测量结果；对２个别人曾经观测过但未测到ＣＯ的行星状星云：Ｓｈ２７１和Ｍ４１８，本文第一次证认了它们的ＣＯ发射；对４个别人从未进行过ＣＯ搜寻的行星状星云：ＶＶ１８，Ｍ２５２，Ｈｅ２４５９和Ｋ３３１，本文第一次进行了观测，并得到了它们的ＣＯ（１０）谱．由ＣＯ的发射谱征可见。e present new observations of CO(1-0) line emission in ten planetary nebulae with the 13.7m telescope of the Purple Mountain Observatory at the Qinghai Station, including the first CO(1-0) observations of NGC 6445, M1.59, M4.9 and M2.51 which have already been observed in CO(2-1), and the first confirmed detections in CO for Sh2.71 and M4.18 which haven′t been detected in previous CO surveys. The others, VV1.8, M2.52, He2.459 and K3.31 are newly detected planetary nebulae with CO(1 0) emission. From the CO spectra, we suggest that VV1.8 is an object misclassified as a planetary nebula.

关 键 词：CO谱线发射 行星状星云 恒星演化 晚期阶段 星云 

分 类 号：P155.2[天文地球—天文学] P152