Mid-infrared observations of the circumstellar disks around PDS 66 and CRBR 2422.8-3423

Mid-infrared observations of the circumstellar disks around PDS 66 and CRBR 2422.8-3423
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PDS 66 和 CRBR 2422 周围星周盘的中红外观测 8-3423

DOI:
10.1051/0004-6361/201321148
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发表时间:
2013
影响因子:
6.5
通讯作者:
S. Wolf
S. Wolf
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
C. Gräfe;S. Wolf

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目的利用VISIR/VLT在N波段和Q波段对PDS 66和CRBR 2422.8-3423星周盘进行中红外观测和测光。我们的目标是解决这些原行星盘,其中携带潜在的签名的中间或后期阶段的磁盘演化和正在进行的行星formation.MethodsWe的内部区域确定的径向亮度轮廓我们的目标对象和相应的PSF参考之前和之后,我们的目标对象观察。背景标准偏差,标准误差,和观察期间的视宁度变化被考虑。采用一个简单的辐射传输模型,从以前的研究中所采取的参数的基础上,我们推导出的约束内盘孔半径的dust disk. ResultsBefore我们的科学目标周围的拱盘空间分辨在我们的观测。然而,我们能够将PDS 66和CRBR 2422.8-3423的内盘孔半径分别限制为<15.0-0.5+0.5AU和<10.5-1.0+0.5AU。我们进行的光度测量产生PDS 66的599 ± 8 mJy的N带通量密度和CRBR 2422.8-3423的130 ± 14 mJy的N带通量密度,以及CRBR 2422.8-3423的858 ± 109 mJy的Q带通量密度。
AimsWe present mid-infrared observations and photometry of the circumstellar disks around PDS 66 and CRBR 2422.8-3423, obtained with VISIR/VLT in theNband and for the latter also in theQband. Our aim is to resolve the inner regions of these protoplanetary disks, which carry potential signatures of intermediate or later stages of disk evolution and ongoing planet formation.MethodsWe determined the radial brightness profiles of our target objects and the corresponding PSF reference that were observed before and after our target objects. Background standard deviations, the standard errors, and the seeing variations during the observations were considered. Adopting a simple radiative transfer model based on parameters taken from previous studies, we derived constraints on the inner-disk hole radius of the dust disk.ResultsNeither of the circumstellar disks around our science targets are spatially resolved in our observations. However, we are able to constrain the inner-disk hole radius to <15.0-0.5+0.5AU and <10.5-1.0+0.5AU for PDS 66 and CRBR 2422.8-3423, respectively. The photometry we performed yieldsN-band flux densities of 599 ± 8 mJy for PDS 66 and 130 ± 14 mJy for CRBR 2422.8-3423, as well as aQ-band flux density of 858 ± 109 mJy for CRBR 2422.8-3423.
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