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首页> 外文期刊>The Astrophysical journal >EMBEDDED CLUSTERS IN THE LARGE MAGELLANIC CLOUD USING THE VISTA MAGELLANIC CLOUDS SURVEY*
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EMBEDDED CLUSTERS IN THE LARGE MAGELLANIC CLOUD USING THE VISTA MAGELLANIC CLOUDS SURVEY*

机译:使用VISTA麦哲伦云调查在大型麦哲伦云中嵌入集群*

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We present initial results of the first large-scale survey of embedded star clusters in molecular clouds in the Large Magellanic Cloud (LMC) using near-infrared imaging from the Visible and Infrared Survey Telescope for Astronomy Magellanic Clouds Survey. We explored a ~1.65 deg2 area of the LMC, which contains the well-known star-forming region 30 Doradus as well as ~14% of the galaxy's CO clouds, and identified 67 embedded cluster candidates, 45 of which are newly discovered as clusters. We have determined the sizes, luminosities, and masses for these embedded clusters, examined the star formation rates (SFRs) of their corresponding molecular clouds, and made a comparison between the LMC and the Milky Way. Our preliminary results indicate that embedded clusters in the LMC are generally larger, more luminous, and more massive than those in the local Milky Way. We also find that the surface densities of both embedded clusters and molecular clouds is ~3 times higher than in our local environment, the embedded cluster mass surface density is ~40 times higher, the SFR is ~20 times higher, and the star formation efficiency is ~10 times higher. Despite these differences, the SFRs of the LMC molecular clouds are consistent with the SFR scaling law presented in Lada et al. This consistency indicates that while the conditions of embedded cluster formation may vary between environments, the overall process within molecular clouds may be universal.
机译:我们展示了使用来自天文麦哲伦星云观测的可见和红外测量望远镜的近红外成像,对大型麦哲伦星云(LMC)中的分子云中的星团中的嵌入式星团进行的首次大规模调查的初步结果。我们探索了LMC的约1.65 deg2区域,其中包含著名的恒星形成区30 Doradus以及约14%的银河系CO云,并确定了67个嵌入式星团候选物,其中45个是新发现的星团。 。我们已经确定了这些嵌入式星团的大小,光度和质量,检查了它们相应的分子云的恒星形成率(SFR),并对LMC和银河系进行了比较。我们的初步结果表明,与当地银河系相比,LMC中的嵌入星团通常更大,更发光,更重。我们还发现,嵌入式团簇和分子云的表面密度比我们当地的环境高约3倍,嵌入式团簇的表面密度约高40倍,SFR约高20倍,并且恒星形成效率高高约10倍。尽管存在这些差异,LMC分子云的SFR与Lada等人提出的SFR标度定律一致。这种一致性表明,尽管嵌入式簇形成的条件可能因环境而异,但分子云内的整个过程可能是通用的。

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