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首页> 外文期刊>The Astrophysical journal >AN X-RAY AND NEAR-INFRARED STUDY OF YOUNG STARS IN THE CARINA NEBULA
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AN X-RAY AND NEAR-INFRARED STUDY OF YOUNG STARS IN THE CARINA NEBULA

机译：脊柱状星状云的X射线和近红外研究

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摘要

We present a multiwavelength study of the central region of the Carina Nebula, including Trumpler 16 and part of Trumpler 14. Our analysis of the Chandra X-Ray Observatory archival data led to the identification of 454 X-ray sources. These sources were then cross-identified with optical photometric and spectroscopic information available from the literature and with newly obtained near-infrared (JHK_s) imaging observations. A total of 38 known OB stars are found to be X-ray emitters. All the O stars and early-B stars follow the nominal relation between the X-ray and bolometric luminosities, L_x～ 10~(-7)L_(bol). A few mid- to late-B stars are found to be associated with X-ray emission, likely attributable to T Tauri companions. We discovered 16 OB star candidates that suffer a large extinction in the optical wave bands. Some 300 sources have the X-ray and infrared characteristics of late-type pre-main-sequence stars. Our sample represents the most comprehensive census of the young stellar population in the Carina Nebula so far and should be useful for the study of the star formation history of this massive starburst region. We also report the finding of a compact (2' × 4') group of 10 relatively bright X-ray sources, all of which are detected in the near-infrared wavelengths and are highly reddened. The group is spatially coincident with the dark V-shaped dust lane bisecting the Carina Nebula and may be part of an embedded association. The distribution of the young stellar groups surrounding the H Ⅱ region associated with Trumpler 16 is consistent with the collect-and-collapse scenario of triggered star formation.
机译：我们提出了一个对Carina星云中部地区的多波长研究，包括Trumpler 16和Trumpler 14的一部分。我们对钱德拉X射线天文台档案数据的分析导致454个X射线源的识别。然后，这些来源与可从文献中获得的光学光度和光谱信息以及新近获得的近红外（JHK_s）成像观测结果进行交叉识别。发现总共38个已知的OB星是X射线发射器。所有的O星和早B星都遵循X射线和辐射热亮度L_x〜10〜（-7）L_（bol）的标称关系。发现一些B中晚期至B颗恒星与X射线发射有关，很可能归因于T Tauri伴星。我们发现了16个OB恒星候选者，它们在光波段中都已经绝种。大约300个源具有晚期型主序前恒星的X射线和红外特征。我们的样本代表了迄今为止Carina星云中最年轻的恒星种群的普查数据，对于研究这一巨大星暴区域的恒星形成历史应该是有用的。我们还报告了一个紧凑的（2'×4'）组的发现，该组包含10个相对较亮的X射线源，所有这些源均在近红外波长中检测到并且高度发红。该组在空间上与将Carina星云一分为二的深色V形尘埃带重合，并且可能是嵌入式关联的一部分。与Trumpler 16相关的HⅡ区周围的年轻恒星群的分布与触发恒星形成的收集和塌陷情况一致。

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