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arXiv 1306.1768astro-ph.EP
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过渡盘中的一个主要的非对称尘埃陷阱

A Major Asymmetric Dust Trap in a Transition Disk

Nienke van der Marel, Ewine F. van Dishoeck, Simon Bruderer, Til Birnstiel, Paola Pinilla, Cornelis P. Dullemond, Tim A. van Kempen, Markus Schmalzl, Joanna M. … 展开作者

Nienke van der Marel, Ewine F. van Dishoeck, Simon Bruderer, Til Birnstiel, Paola Pinilla, Cornelis P. Dullemond, Tim A. van Kempen, Markus Schmalzl, Joanna M. Brown, Gregory J. Herczeg, Geoffrey S. Mathews, Vincent Geers

摘要:

已发现的系外行星的统计数据表明,行星的形成效率很高。但是,还有一些根本性的问题没有解决,比如在行星形成过程中,原行星盘中的粒子过度向内漂移。最近的理论调用尘埃陷阱来克服这个问题。我们报告的尘埃陷阱的检测在磁盘周围的恒星Oph IRS 48使用阿塔卡马大型毫米/亚毫米阵列(ALMA)的意见。0.44毫米波长的连续谱图显示了恒星一侧的高对比度新月形发射,这些发射来自毫米级颗粒,而中红外图像(微米级尘埃)和一氧化碳6-5旋转线追踪的气体都表明以恒星为中心的环。大颗粒与小颗粒/气体的分布差异可以用由同伴触发的涡旋形灰尘陷阱来模拟。

英文摘要:

The statistics of discovered exoplanets suggest that planets form efficiently. However, there are fundamental unsolved problems, such as excessive inward drift of particles in protoplanetary disks during planet formation. Recent theories invoke dust traps to overcome this problem. We report the detection of a dust trap in the disk around the star Oph IRS 48 using observations from the Atacama Large Millimeter/submillimeter Array (ALMA). The 0.44-millimeter-wavelength continuum map shows high-contrast crescent-shaped emission on one side of the star originating from millimeter-sized grains, whereas both the mid-infrared image (micrometer-sized dust) and the gas traced by the carbon monoxide 6-5 rotational line suggest rings centered on the star. The difference in distribution of big grains versus small grains/gas can be modeled with a vortex-shaped dust trap triggered by a companion.

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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