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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Mid-infrared multi-wavelength imaging of Ophiuchus?IRS?48 transitional disk
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Mid-infrared multi-wavelength imaging of Ophiuchus?IRS?48 transitional disk

机译：Ophiuchus？IRS？48过渡盘的中红外多波长成像

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Transitional disks around the Herbig Ae/Be stars are fascinating targets in the contexts of disk evolution and planet formation. Oph?IRS?48 is one of such Herbig Ae stars, which shows an inner dust cavity and azimuthally lopsided large dust distribution. We present new images of Oph?IRS?48 at eight mid-infrared (MIR) wavelengths from 8.59 to 24.6?μm taken with COMICS mounted on the 8.2?m Subaru Telescope. The N-band (7 to 13?μm) images show that the flux distribution is centrally peaked with a slight spatial extent, while the Q-band (17 to 25?μm) images show asymmetric double peaks (east and west). Using 18.8- and 24.6?μm images, we derived the dust temperature at both east and west peaks to be 135?± ?22?K. Thus, the asymmetry may not be attributed to a difference in the temperature. Comparing our results with previous modeling works, we conclude that the inner disk is aligned to the outer disk. A shadow cast by the optically thick inner disk has a great influence on the morphology of MIR thermal emission from the outer disk.
机译：在圆盘演化和行星形成的背景下，Hertig Ae / Be恒星周围的过渡圆盘是引人入胜的目标。 Oph？IRS？48是这类Herbig Ae恒星之一，它具有内部尘埃腔和方位偏斜的大尘埃分布。我们展示了使用安装在8.2？m斯巴鲁望远镜上的COMICS拍摄的八种中红外（MIR）波长从8.59至24.6？m的Oph？IRS？48的新图像。 N波段（7至13？μm）图像显示通量分布在中心出现峰值，并具有较小的空间范围，而Q波段（17至25？μm）图像显示不对称双峰（东和西）。使用18.8和24.6μm的图像，我们得出东西峰的粉尘温度均为135？±？22？K。因此，不对称性可能不归因于温度差异。将我们的结果与以前的建模工作进行比较，我们得出结论，内部磁盘与外部磁盘对齐。由光学上较厚的内部磁盘投射的阴影对从外部磁盘发出的MIR热发射的形态有很大影响。

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