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γ暴研究的重大突破:余辉的发现与观测研究 被引量:8
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作者 黄永锋 《天文学进展》 CSCD 北大核心 1998年第4期330-345,共16页
由于BeppoSAX卫星的独特贡献,最近观测到了若于Υ暴在X射线、光学甚至射电波段上的对应体,一度陷入困境的Υ暴研究再次取得了突破性的进展。目前已经观测到了Υ暴GRB970228持续六个月以上的光学余辉,发现它可能位于一个暗弱的宿主星... 由于BeppoSAX卫星的独特贡献,最近观测到了若于Υ暴在X射线、光学甚至射电波段上的对应体,一度陷入困境的Υ暴研究再次取得了突破性的进展。目前已经观测到了Υ暴GRB970228持续六个月以上的光学余辉,发现它可能位于一个暗弱的宿主星系中;GRB970508的光学余辉有较为复杂的表现,并测出其红移范围0.85<z<2.1。在该暴发生约五、六天之后,还观测到了射电耀发现象。观测上的重大突破比较有力地支持了Υ暴的宇宙学起源及火球模型。 展开更多
关键词 Γ射线 中子星 γ星线天文学 Γ暴
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^(12)CO emission from the Red Rectangle
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作者 Pham Tuan Anh Pham Ngoc Diep +4 位作者 Do Thi Hoai Pham Tuyet Nhung Nguyen Thi Phuong Nguyen Thi Thao Pierre Darriulat 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2015年第12期2213-2228,共16页
Observations of an unprecedented quality made by ALMA on the Red Rectangle of CO(3-2) and CO(6-5) emissions are analysed jointly with the aim of obtaining as simple as possible a description of the gas morphology ... Observations of an unprecedented quality made by ALMA on the Red Rectangle of CO(3-2) and CO(6-5) emissions are analysed jointly with the aim of obtaining as simple as possible a description of the gas morphology and kinematics. Evidence is found for polar conical outflows and for a broad equatorial torus in rotation and expansion. Simple models of both are proposed. Comparing CO(6-5) and CO(3-2) emissions provides evidence for a strong temperature enhancement over the polar outflows. Continuum emission (dust) is seen to be enhanced in the equatorial region. Observed asymmetries are briefly discussed. 展开更多
关键词 stars: AGB and post-AGB -- circumstellar matter -- radio-lines: stars-- planetary nebulae: individual (Red Rectangle)
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