Detection of HC11N in the cold dust cloud TMC-1

被引：202

作者：

Bell, MB

Feldman, PA

Travers, MJ

McCarthy, MC

Gottlieb, CA

Thaddeus, P

机构：

[1] NATL RES COUNCIL CANADA,HERZBERG INST ASTROPHYS,DOMINION ASTROPHYS OBSERV,VICTORIA,BC V8X 4M6,CANADA

[2] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

[3] HARVARD UNIV,DIV ENGN & APPL SCI,CAMBRIDGE,MA 02138

来源：

ASTROPHYSICAL JOURNAL | 1997年 / 483卷 / 01期

关键词：

ISM; abundances; molecules; line; identification; molecular data molecular processes; radio lines;

D O I：

10.1086/310732

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Two consecutive rotational transitions of the long cyanopolyyne HC11N, J = 39 --> 38 and 38 --> 37, have been detected in the cold dust cloud TMC-1 at the frequencies expected from recent laboratory measurements by Travers and coworkers, and at about the expected intensities. The astronomical lines have a mean radial velocity of 5.8(1) km s(-1), in good agreement with the shorter cyanopolyynes HC7N and HC9N observed in this very sharp line source [5.82(5) and 5.84(5) km s(-1), respectively]. The column density of HC,,N is calculated to be 2.8 x 10(11) cm(-2). The abundance of the cyanopolyynes decreases smoothly with length to HC11N, the decrement from one to the next being about six for the longer carbon chains.

引用

页码：L61 / L64

页数：4

共 19 条

[1] MICROWAVE-SPECTRUM, SUBSTITUTION STRUCTURE AND DIPOLE-MOMENT OF CYANOBUTADIYNE, H-C=C-C=C-C=N [J].