Observations of star-forming regions in the lines of methyl acetylene

被引：0
|
作者：
Alakoz, AV [1 ]
Kalenskii, SV [1 ]
Promislov, VG [1 ]
Winnberg, A [1 ]
Johansson, LEB [1 ]
机构：
[1] PN Lebedev Phys Inst, Ctr Astro Space, Moscow 117810, Russia
来源：
33RD ESLAB SYMPOSIUM ON STAR FORMATION FROM THE SMALL TO THE LARGE SCALE | 2000年 / 445卷
关键词：
ISM : clouds; ISM : molecules; radio lines : ISM;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The results of a survey of Galactic star-forming regions in the 5(K) - 4(K) and 6(K) - 5(K) methyl acetylene lines at 84.5 and 102.5 GHz are presented. Forty-three sources are found at 102.5 GHz and 23 at 84.5 GHz, respectively. The emission arise in warm clouds with the kinetic temperature 20-60 K and CH3CCH abundance about several units x 10(-9). Maximum entropy maps of NGC 2264, G30.8-0.1, G34.26+0.15, DR 21(OH), and S 140 demonstrate that the CH3CCH sources are roughly coincident with the areas of (CO)-C-13 and (CO)-O-18 emission. The sizes of the mapped clouds are enclosed in the range 0.1-1.7 pc, virial masses vary between 90 and 6200 M., and densities vary between 6 x 10(4) and 6 x 10(5) cm(-3).
引用
收藏
页码：315 / 318
页数：4
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