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首页> 外文期刊>The Astrophysical journal >DISKS IN TRANSITION IN THE TAURUS POPULATION: SPITZER IRS SPECTRA OF GM AURIGAE AND DM TAURI
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DISKS IN TRANSITION IN THE TAURUS POPULATION: SPITZER IRS SPECTRA OF GM AURIGAE AND DM TAURI

机译：金牛座人口过渡中的碟子：GM AURIGAE和DM TAURI的斯比泽尔IRS谱

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摘要

We present Spitzer Infrared Spectrograph (IRS) observations of two objects of the Taurus population that show unambiguous signs of clearing in their inner disks. In one of the objects, DM Tau, the outer disk is truncated at 3 AU; this object is akin to another recently reported in Taurus, CoKu Tau/4, in that the inner disk region is free of small dust. Unlike CoKu Tau/4, however, this star is still accreting, so optically thin gas should still remain in the inner disk region. The other object, GM Aur, also accreting, has ～0.02 lunar masses of small dust in the inner disk region within ～5 AU, consistent with previous reports. However, the IRS spectrum clearly shows that the optically thick outer disk has an inner truncation at a much larger radius than previously suggested, ～24 AU. These observations provide strong evidence for the presence of gaps in protoplanetary disks.
机译：我们介绍了金牛座种群的两个天体的斯皮策红外光谱仪（IRS）观测结果，它们在其内盘上显示了明确的清除迹象。在其中一个对象DM Tau中，外部磁盘在3 AU处被截断;这个物体类似于最近在金牛座报道的另一个古柯头（CoKu Tau / 4），因为内盘区域没有灰尘。但是，与CoKu Tau / 4不同，该恒星仍在积聚，因此，稀薄的气体仍应保留在内盘区域。另一个物体，GM Aur，也增加，在〜5 AU内的内盘区域有〜0.02的月球小尘埃，与以前的报道一致。但是，IRS光谱清楚地表明，光学上较厚的外盘在比以前建议的〜24 AU大得多的半径处具有内部截断。这些观察结果为原行星盘间隙的存在提供了有力的证据。

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