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THE HYPERFINE STRUCTURES OF HCN-J = 1-0 AND THE IMPLIED PHYSICAL INFORMATIONS .1. S140
ZENG, Q ; YANG, J ; CAO, YQ ; LOU, GF ; FUKUI, Y
1991
Source PublicationASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
Volume180Issue:1Pages:151-155
AbstractThe hyperfine structures of HCN J = 1-0 are observed toward S140 with a high-resolution spectroscope. The measured ratios R02 = T(a)*(F = 0-1)/T(a)**(F = 2-1) and R12 = T(a)*(F = 1-1)/T(a)*(F = 2-1) are 0.29 +/- 0.03 and 0.43 +/- 0.03 separately. A large velocity gradient model, the escape probability method and spherical approximation are adopted to calculate the radiative transfer. The correlations between the ratios of the hyperfine satellites and density (or optical depth) have been studied. To fit the measured ratios, a density of (0.9 +/- 0.1) x 10(6) cm-3 is obtained toward S140 center. According to the differences between the calculated excitation temperatures of the hyperfine satellites, one finds that the so-called hyperfine anomalies is caused by the unrealistic LTE assumption.
Subject Area天文和天体物理
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8560
Collection期刊(老文献)
Recommended Citation
GB/T 7714
ZENG, Q,YANG, J,CAO, YQ,et al. THE HYPERFINE STRUCTURES OF HCN-J = 1-0 AND THE IMPLIED PHYSICAL INFORMATIONS .1. S140[J]. ASTROPHYSICS AND SPACE SCIENCE,1991,180(1):151-155.
APA ZENG, Q,YANG, J,CAO, YQ,LOU, GF,&FUKUI, Y.(1991).THE HYPERFINE STRUCTURES OF HCN-J = 1-0 AND THE IMPLIED PHYSICAL INFORMATIONS .1. S140.ASTROPHYSICS AND SPACE SCIENCE,180(1),151-155.
MLA ZENG, Q,et al."THE HYPERFINE STRUCTURES OF HCN-J = 1-0 AND THE IMPLIED PHYSICAL INFORMATIONS .1. S140".ASTROPHYSICS AND SPACE SCIENCE 180.1(1991):151-155.
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