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arXiv 1104.3560astro-ph.SR
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HD 207129周围的Herschel分辨远红外尘埃环

A Herschel resolved far-infrared dust ring around HD 207129

J. P. Marshall, T. Löhne, B. Montesinos, A. V. Krivov, C. Eiroa, O. Absil, G. Bryden, J. Maldonado, A. Mora, J. Sanz-Forcada, D. Ardila, J. -Ch. Augereau, A. Ba… 展开作者

J. P. Marshall, T. Löhne, B. Montesinos, A. V. Krivov, C. Eiroa, O. Absil, G. Bryden, J. Maldonado, A. Mora, J. Sanz-Forcada, D. Ardila, J. -Ch. Augereau, A. Bayo, C. Del Burgo, W. Danchi, S. Ertel, D. Fedele, M. Fridlund, J. Lebreton, B. M. González-García, R. Liseau, G. Meeus, S. Müller, G. L. Pilbratt, A. Roberge, K. Stapelfeldt, P. Thébault, G. J. White, S. Wolf

摘要:

围绕主序星的尘埃碎片盘被认为是系统中微行星持续碰撞研磨的结果。这些系统中的大多数都没有得到解决,并且由于缺乏关于尘埃位置的信息,对尘埃性质的分析受到限制。(<20个,FGK光谱类型)在一个体积有限的调查,以限制这些恒星周围的冷尘埃的绝对入射率,通过检测远红外过量发射的通量水平相当于埃奇沃思-柯伊伯带(EKB)。利用Herschel PACS和SPIRE对类日恒星HD 207129进行了观测。在所有三个PACS波段中,我们解析了与散射光观察一致的环状结构。使用α牧夫座作为参考点扩散函数(PSF),我们对图像进行了去卷积,清晰地分辨出了70和100 μm处的圆盘内部间隙。我们首次分辨出了100 μm碎片盘的产尘微星带。我们测量的径向轮廓和部分光度的光盘,并比较的值,以那些光盘周围的恒星的年龄和/或光谱类型相似,放置在其他解决的赫歇尔/DUNES光盘观察到的背景下,这个光盘。

英文摘要:

Dusty debris discs around main sequence stars are thought to be the result of continuous collisional grinding of planetesimals in the system. The majority of these systems are unresolved and analysis of the dust properties is limited by the lack of information regarding the dust location.vThe Herschel DUNES key program is observing 133 nearby, Sun-like stars (<20 pc, FGK spectral type) in a volume limited survey to constrain the absolute incidence of cold dust around these stars by detection of far infrared excess emission at flux levels comparable to the Edgeworth-Kuiper belt (EKB). We have observed the Sun-like star HD 207129 with Herschel PACS and SPIRE. In all three PACS bands we resolve a ring-like structure consistent with scattered light observations. Using α Boötis as a reference point spread function (PSF), we deconvolved the images, clearly resolving the inner gap in the disc at both 70 and 100 μm. We have resolved the dust-producing planetesimal belt of a debris disc at 100 μm for the first time. We measure the radial profile and fractional luminosity of the disc, and compare the values to those of discs around stars of similar age and/or spectral type, placing this disc in context of other resolved discs observed by Herschel/DUNES.

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。

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