Detection of (SiO)-Si-29 nu=3 J=8->7 maser emission: A new IR SiO overlap

被引：0
|
作者：
GonzalezAlfonso, E
Alcolea, J
Cernicharo, J
机构：
[1] NATL ASTRON OBSERV, E-28800 ALCALA DE HENARES, MADRID, SPAIN
[2] INST ESTRUCT MAT, DEPT FIS MOL, MADRID, SPAIN
来源：
ASTRONOMY & ASTROPHYSICS | 1996年 / 313卷 / 03期
关键词：
masers; radiative transfer; stars; AGE; circumstellar matter; late-type;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have performed detailed radiative transfer calculations which show that, in circumstellar envelopes of late-type stars, some submillimeter rotational transitions of (SiO)-Si-29 and (SiO)-Si-30 can be inverted with amplification high enough to be detected. The pumping mechanism is due to overlaps between re-vibrational lines of the three stable SiO isotopomers. We present the detection of one of these lines, the v=3 J=8-7 transition of (SiO)-Si-29, in four circumstellar sources. This is the highest frequency SiO maser detected up to date, and provides a strong confirmation of infrared SiO overlaps as efficient pumping agents of SiO masers.
引用
收藏
页码：L13 / L16
页数：4
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