DETECTION OF C-13 ISOTOPOMERS OF HC5N (J=9-8) IN THE CIRCUMSTELLAR ENVELOPE OF IRC+10216

被引：11

作者：

BELL, MB

FELDMAN, PA

机构：

[1] Herzberg Institute of Astrophysics, National Research Council of Canada, Ottawa, Ont. K1A 0R6

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 367卷 / 01期

关键词：

ABUNDANCES; INTERSTELLAR-MOLECULES; RADIO SOURCES-LINES; STARS-CARBON; STARS-CIRCUMSTELLAR SHELLS; STARS-LATE-TYPE;

D O I：

10.1086/185925

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of HC13CCCCN, HCC13CCCN, and HCCC13CCN (J = 9-8) in the molecular envelope of the carbon star IRC + 10216. by comparing reliable values for the C-13/C-12 isotopic ratio in IRC + 10216 with our results, we conclude that H12C5N is probably optically thick (tau almost-equal-to 2), which in turn suggests that the gas distribution must be quite clumpy, or at least highly inhomogeneous, with a volume filling factor approximately 0.1% to a few percent.

引用

页码：L33 / L36

页数：4

共 19 条

[1]

AVERY L, 1990, COMMUNICATION

[2]

BARNES TG, 1977, ASTROPHYS J LETT, V162, pL15

[3]

BELL MB, 1991, UNPUB

[4]

BIEGING JH, 1986, BAAS, V18, P1007

[5]

CHERNICHARO J, 1990, IN PRESS

[6]

JOHANSSON LEB, 1984, ASTRON ASTROPHYS, V130, P227

[7]

KAHANE C, 1988, ASTRON ASTROPHYS, V190, P167

[8] CIRCUMSTELLAR ENVELOPE OF IRC+10216 [J].

KWAN, J ;

HILL, F .

ASTROPHYSICAL JOURNAL, 1977, 215 (03) :781-787

[9] AMMONIA IN IRC +10-DEGREES-216 - THE INVERSION LINES AS A PROBE OF ENVELOPE THERMAL STRUCTURE [J].

KWOK, S ;

BELL, MB ;

FELDMAN, PA .

ASTROPHYSICAL JOURNAL, 1981, 247 (01) :125-129

[10]

LAFONT S, 1982, ASTRON ASTROPHYS, V106, P201

← 1 2 →