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A SURVEY OF IRRADIATED PILLARS, GLOBULES, AND JETS IN THE CARINA NEBULA

机译:卡里纳星云中辐照过的支柱,球形和凸出物的调查

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We present wide-field, deep narrowband H2, Brγ, Hα, [S ii], [O iii], and broadband I- and K-band images of the Carina star formation region. The new images provide a large-scale overview of all the H2 and Brγ emission present in over a square degree centered on this signature star-forming complex. By comparing these images with archival Hubble Space Telescope and Spitzer images we observe how intense UV radiation from O and B stars affects star formation in molecular clouds. We use the images to locate new candidate outflows and identify the principal shock waves and irradiated interfaces within dozens of distinct areas of star-forming activity. Shocked molecular gas in jets traces the parts of the flow that are most shielded from the intense UV radiation. Combining the H2 and optical images gives a more complete view of the jets, which are sometimes only visible in H2. The Carina region hosts several compact young clusters, and the gas within these clusters is affected by radiation from both the cluster stars and the massive stars nearby. The Carina Nebula is ideal for studying the physics of young H ii regions and photodissociation region (PDR), as it contains multiple examples of walls and irradiated pillars at various stages of development. Some of the pillars have detached from their host molecular clouds to form proplyds. Fluorescent H2 outlines the interfaces between the ionized and molecular gas, and after removing continuum, we detect spatial offsets between the Brγ and H2 emission along the irradiated interfaces. These spatial offsets can be used to test current models of PDRs once synthetic maps of these lines become available.
机译:我们提出了Carina星形成区的宽视野,深窄带H2,Brγ,Hα,[S ii],[O iii]以及宽带I和K波段图像。这些新图像以该标志性恒星形成复合体为中心,以平方度为单位提供了所有H2和Brγ发射的大规模概览。通过将这些图像与哈勃太空望远镜和Spitzer档案图像进行比较,我们观察到来自O和B恒星的强烈紫外线辐射如何影响分子云中的恒星形成。我们使用这些图像来定位新的候选流出物,并在数十个不同的恒星形成区域内识别主要的冲击波和辐照界面。射流中受到冲击的分子气体会追踪气流中最不受强紫外线辐射影响的部分。将H2和光学图像结合在一起,可以更完整地看到喷流,这些喷流有时仅在H2中可见。 Carina地区拥有几个紧凑的年轻星团,这些星团中的气体受到星团星和附近大质量星的辐射的影响。隆鼻星云非常适合研究年轻的H ii区域和光解离区域(PDR)的物理学,因为它包含了处于不同发展阶段的墙壁和辐照柱的多个示例。一些支柱已经从它们的宿主分子云中脱离出来,形成了柱状体。荧光H2概述了电离气体和分子气体之间的界面,在除去连续体后,我们检测到沿辐射界面的Brγ和H2发射之间的空间偏移。一旦这些线的合成图可用,这些空间偏移量可用于测试PDR的当前模型。

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