OBSERVATIONS OF 13.5 MICRON ROTATION-VIBRATION LINES OF SIS IN IRC PLUS 10216

被引：37

作者：

BOYLE, RJ

KEADY, JJ

JENNINGS, DE

HIRSCH, KL

WIEDEMANN, GR

机构：

[1] DICKINSON COLL,DEPT PHYS & ASTRON,CARLISLE,PA 17013

[2] LOS ALAMOS NATL LAB,GRP T4,LOS ALAMOS,NM 87545

[3] NASA,GODDARD SPACE FLIGHT CTR,PLANETARY SYST BRANCH,GREENBELT,MD 20771

[4] UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996

[5] EUROPEAN SO OBSERV,W-8046 GARCHING,GERMANY

来源：

ASTROPHYSICAL JOURNAL | 1994年 / 420卷 / 02期

关键词：

CIRCUMSTELLAR MATTER; MOLECULAR PROCESSES; STARS; ABUNDANCES; CARBON; INDIVIDUAL; (IRC; 10216);

D O I：

10.1086/173609

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first observations of the 13.5 mu m fundamental band of SiS in the spectrum of the heavily obscured carbon star IRC +10216. The lines are formed in the inner region of the circumstellar envelope where the gas is accelerating and where the temperature ranges from 800-500 K. We have carried out a detailed model of the observed line profiles. Our observations are best fit by a gradient in the abundance of SiS. We derive an abundance relative to molecular hydrogen of x(SiS) = 4.3 x 10(-6) ata distance of twelve stellar radii from the central star rising to x(SiS)= 4.3 x 10(-5) at a few Stellar radii from the surface of the star.

引用

页码：863 / 868

页数：6

共 43 条

[1] The band spectrum of silicon monosulphide and its relation to the band spectra of similar molecules [J].