A Comparison of c-C3H2 and I-C3H2 in the Spiral Arm Clouds

作者：Kulczak Jastrzebska M^*; Lis D; Gerin M

来源：Acta Astronomica, 2012, 62(3): 313-321.

• Radio lines: ISM
• ISM: molecules
• ISM: abundances

Using the IRAM 30-m telescope, we observed molecular absorption lines from C-C3H2 produced in diffuse clouds toward the high-mass star forming regions W51 e1/e2 and W49N to determine the abundance ratio between the cyclic and linear isomers of C3H2 (N-c/N-l). The abundance ratio is found to be 3-5 in the sources where I-C3H2 was previously detected. A possible source of uncertainty in the determination of N-c/N-l is related to the estimate of N(c-C3H2). The main goal of this paper is verification of this hypothesis.

• 出版日期2012