arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1302.3533astro-ph.GA
收藏

30剑鱼座中的十大斯皮策YSO

The Top Ten Spitzer YSOs in 30 Doradus

Nolan R. Walborn, Rodolfo H. Barba, Marta M. Sewilo

摘要:

在30个剑鱼座触发的第二代Spitzer点光源中,最明亮的点光源在3-8微米区域内进行了相干研究。它们的性质显示出显著的多样性和复杂性。有些也是最聪明的JHK来源之一,而另一些则不是。当使用HST NICMOS和WFPC 2/WFC 3(如可用)或VISTA/VMC(否则)在较高角分辨率下检查时,其中几个是多重的。一个是靠近复杂西北边缘的尘埃致密H II区域,包含六个明亮的I波段源。另外三个似乎与明亮的WN星密切相关,并提出了因果关系。一些是在尘埃柱的头部朝向R136,如前所述,从NICMOS数据。一个位于一个由更暗的源组成的紧凑集群中,而另一个在最高分辨率下看起来是单片的。令人惊讶的是,其中一个是与Walborn等人的结2相关的两个扩展的“神秘斑点”中较亮的。质量来自YSO模型,用于未解析的源,位于10-30 M_{sun}范围内。对这一独特区域的红外源的进一步分析将促进对触发大质量恒星形成的理解,也许是以一些意想不到和前所未有的方式。

英文摘要:

The most luminous Spitzer point sources in the 30 Doradus triggered second generation are investigated coherently in the 3-8 micron region. Remarkable diversity and complexity in their natures are revealed. Some are also among the brightest JHK sources, while others are not. Several of them are multiple when examined at higher angular resolutions with HST NICMOS and WFPC2/WFC3 as available, or with VISTA/VMC otherwise. One is a dusty compact H II region near the far northwestern edge of the complex, containing a half dozen bright I-band sources. Three others appear closely associated with luminous WN stars and causal connections are suggested. Some are in the heads of dust pillars oriented toward R136, as previously discussed from the NICMOS data. One resides in a compact cluster of much fainter sources, while another appears monolithic at the highest resolutions. Surprisingly, one is the brighter of the two extended "mystery spots" associated with Knot 2 of Walborn et al. Masses are derived from YSO models for unresolved sources and lie in the 10-30 M_{sun} range. Further analysis of the IR sources in this unique region will advance understanding of triggered massive star formation, perhaps in some unexpected and unprecedented ways.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑