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
收藏
页码：863 / 868
页数：6
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