INTERSTELLAR DETECTION OF DEUTERATED METHYL CYANIDE

被引：0

作者：

GERIN, M

COMBES, F

WLODARCZAK, G

JACQ, T

GUELIN, M

ENCRENAZ, P

LAURENT, C

机构：

[1] OBSERV PARIS, SECT MEUDON, DEMIRM, F-92195 MEUDON, FRANCE

[2] OBSERV BORDEAUX, F-33270 FLOIRAC, FRANCE

[3] INST RADIO ASTRON MILLIMETR, F-38406 ST MARTIN DHERES, FRANCE

[4] UNIV LILLE 1, SPECT HERTZIENNE LAB, F-59655 VILLENEUVE DASCQ, FRANCE

来源：

ASTRONOMY & ASTROPHYSICS | 1992年 / 259卷 / 02期

关键词：

INTERSTELLAR MEDIUM; ABUNDANCES; GENERAL; MOLECULES; RADIO LINES; MOLECULAR; INTERSTELLAR;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Deuterated methyl cyanide has been detected towards the hot core of IRc2 in OMC1 with a D/H isotopic ratio of about 0.01. This species presents two states not connected by collisional or radiative transitions (ortho and para) whose expected ratio 3:1. Our data suggests that the observed ratio is close to 1, as if the molecules of CH2DCN have not had time to reach the statistical equilibrium. We have also detected tentatively CH2DCN towards G34.3, with the same isotopic ratio (D/H less-than-or-almost-equal-to 0.01); in this source the ortho species seems to be more abundant than the para species.

引用

页码：L35 / L38

页数：4

共 17 条

[1]

ANDERSSON M, 1985, SUB MILLIMETER ASTRO, P353

[2] MOLECULAR ABUNDANCES IN OMC-1 - THE CHEMICAL-COMPOSITION OF INTERSTELLAR MOLECULAR CLOUDS AND THE INFLUENCE OF MASSIVE STAR FORMATION [J].