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首页> 外文期刊>The Astrophysical journal >OBSERVATIONS OF THE 6 cm LINES OF OH IN EVOLVED (OH/IR) STARS
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OBSERVATIONS OF THE 6 cm LINES OF OH IN EVOLVED (OH/IR) STARS

机译:演化(OH / IR)星中OH的6 cm线的观测

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摘要

Recent observational and theoretical advances have called into question traditional OH maser pumping models in evolved (OH/IR) stars. The detection of excited-state OH lines would provide additional constraints to discriminate among these theoretical models. In this Letter, we report on VLA observations of the 4750 and 4765 MHz lines of OH toward 45 sources, mostly evolved stars. We detect 4765 MHz emission in the star-forming regions Mon R2 and LDN 1084, but we do not detect excited-state emission in any evolved stars. The flux density and velocity of the 4765 MHz detection in Mon R2 suggest that a new flaring event has begun.
机译:最近的观测和理论进展使人们对演化(OH / IR)星中的传统OH maser抽运模型提出了质疑。激发态OH线的检测将提供额外的约束条件,以区分这些理论模型。在这封信中,我们报告了VLA观测到的4750和4765 MHz OH线朝向45个源(主要是恒星)的情况。我们在形成恒星的区域Mon R2和LDN 1084中检测到4765 MHz的发射,但是在任何已演化的恒星中均未检测到激发态发射。 Mon R2中4765 MHz检测的通量密度和速度表明新的燃烧事件已经开始。

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