Changing environments of pre-main-sequence stars and their effect on the 3 μm ice feature

J. A. Graham, W. P. Chen

研究成果: 雜誌貢獻期刊論文同行評審

14 引文 斯高帕斯(Scopus)

摘要

We present 3 μm spectra of three pre-main-sequence stellar objects. The heavily embedded infrared source HH100-IR, and two optically visible stars that apparently power the Herbig-Haro objects HH52, 53, 54, and HH57, are likely to represent different stages during early stellar evolution. Our medium-resolution spectra of HH100-IR confirm the existence of a very strong ice band absorption (optical depth 0.8-1.2 at 3.07 μm) discovered by Whittet & Blades [MNRAS, 191, 309 (1980)] with lower resolution. Each of the visible stars shows a weaker (optical depth 0.2-0.4) water-ice feature but with a relatively prominent absorption dip at 2.97 μm which we believe is due to ammonia ice. A detailed inspection of the line profiles suggests that the environment around the optically visible stars is significantly warmer (∼100 K) than that around HH100-IR (∼10-20 K) and that processing of remnant circumstellar dust is already underway.

原文???core.languages.en_GB???
頁(從 - 到)1405-1408
頁數4
期刊Astronomical Journal
102
發行號4
DOIs
出版狀態已出版 - 10月 1991

指紋

深入研究「Changing environments of pre-main-sequence stars and their effect on the 3 μm ice feature」主題。共同形成了獨特的指紋。

引用此