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首页> 外文期刊>The Astrophysical journal >DISCOVERY OF HERBIG-HARO OBJECTS AND MOLECULAR HYDROGEN JETS NEAR BOK GLOBULE CB 34
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DISCOVERY OF HERBIG-HARO OBJECTS AND MOLECULAR HYDROGEN JETS NEAR BOK GLOBULE CB 34

机译:在BOK GLOBULE CB 34附近发现草本植物和分子氢射流的发现

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We report the discovery of four new Herbig-Haro objects (HH 290S, HH 290N1, HH 290N2, and HH 291) and molecular hydrogen jets associated with the star formation activity seen in Bok globule CB 34. The HH objects were discovered in narrowband [S II] and Hα CCD images. Two of these objects are also seen in a corresponding 2.12 μm v = 1-0 S(l) H_2 near-infrared image confirming their shock emission nature. These objects are likely to be driven by an embedded near-infrared source belonging to the aggregate of young stellar objects recently found by Alves & Yun. Additional shock emission features appear in the molecular hydrogen image. We identify two sets of infrared structures extending for about 0.15 pc and toward the region of highest extinction in the cloud. The features in each set are well aligned and are likely to trace the presence of embedded jets with high degrees of collimation. Taken together, these features delineate three separate chains of shock-excited nebulae. One chain is seen in both the optical and near-infrared images. Of the other two chains, one is seen partly in the optical and partly in the infrared, and the other is seen only in the infrared images.
机译:我们报告发现了四个新的Herbig-Haro天体(HH 290S,HH 290N1,HH 290N2和HH 291)以及与在Bok小球CB 34中看到的恒星形成活动相关的分子氢射流。HH天体是在窄带[ S II]和HαCCD图像。在相应的2.12μmv = 1-0 S(l)H_2近红外图像中还可以看到这些物体中的两个,从而确认了它们的震动发射特性。这些物体可能是由一个嵌入式的近红外光源驱动的,该光源属于Alves&Yun最近发现的年轻恒星物体的集合。分子氢图像中出现了其他冲击波发射特征。我们确定了两组红外结构,它们延伸约0.15 pc,并向云中最高消光区域延伸。每组中的特征对齐良好,并可能以高度准直的方式跟踪嵌入式射流的存在。综上所述,这些特征描绘了三个单独的激波激发星云链。在光学和近红外图像中都可以看到一条链。在其他两个链中,一个在光学中部分可见,部分在红外中可见,另一条仅在红外图像中可见。

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