NITROGEN SULFIDE IN QUIESCENT DARK CLOUDS

被引：42

作者：

MCGONAGLE, D ^{[1
]}

IRVINE, WM ^{[1
]}

OHISHI, M ^{[1
]}

机构：

[1] NOBEYAMA RADIO OBSERV,MINAMISA KU,NAGANO 38413,JAPAN

来源：

ASTROPHYSICAL JOURNAL | 1994年 / 422卷 / 02期

关键词：

ISM; CLOUDS; INDIVIDUAL; (TMC-1; L134N); MOLECULES;

D O I：

10.1086/173755

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first detection of interstellar nitrogen sulfide (NS) in cold dark clouds. Several components of the 2PI1/2, J = 3/2 --> 1/2 and J = 5/2 --> 3/2 transitions were observed in TMC-1 and L134N. The inferred column density for TMC-1 is N(NS) approximately 8 x 10(12) cm-2 toward the NH, peak in that cloud, and in L134N is N(NS) approximately 3 x 10(12) cm-2 toward the position of peak NH3 emission. These values correspond to fractional abundances relative to molecular hydrogen of f(NS) approximately 8 x 10(-10) for TMC- 1, and f(NS) approximately 6 x 10(-10) for L134N. The NS emission is extended along the TMC-1 ridge and is also extended in L134N. The measured abundances are significantly higher than those predicted by some recent gas phase ion-molecule models.

引用

页码：621 / 625

页数：5

共 28 条

[1] MILLIMETER-WAVE SPECTROSCOPY OF NS (X-PI-2) UP TO UPSILON=5 [J].