OBSERVATIONS OF 40-70 MICRON BANDS OF ICE IN IRAS 09371+1212 AND OTHER STARS

被引：76

作者：

OMONT, A

MOSELEY, SH

FORVEILLE, T

GLACCUM, WJ

HARVEY, PM

LIKKEL, L

LOEWENSTEIN, RF

LISSE, CM

机构：

[1] NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771

[2] NASA,GODDARD SPACE FLIGHT CTR,STX INC,GREENBELT,MD 20771

[3] UNIV CHICAGO,YERKES OBSERV,WILLIAMS BAY,WI 53191

[4] UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712

[5] UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024

来源：

ASTROPHYSICAL JOURNAL | 1990年 / 355卷 / 01期

关键词：

Infrared: spectra; Interstellar: grains; Stars: circumstellar shells;

D O I：

10.1086/185730

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

IRAS 09371 + 1212 is still an absolutely unique object. This M giant star, with circumstellar CO and a spectacular bipolar nebula, displays unique IRAS far-infrared colors which had been attributed to strong emission in the 40-70 μm bands of ice, as subsequently supported by the observation of a strong 3.1 μm absorption band. The results of our KAO observations have confirmed its unusual nature: the far-infrared bands of ice are by far the strongest known. Its dust temperature, ≤50 K, is by far the lowest known for a late-type circumstellar envelope. The ice is clearly crystalline, and there are some indications that the emissivity index of the silicates is ∼2. We also report the observation of the 44 μm band in the very cold OH/IR circumstellar envelopes OH 231.8+4.2 and OH 127.8+0.0.

引用

页码：L27 / L30

页数：4

共 31 条

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