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
中科院分区:
文献类型:
--
作者:
C. Gräfe;S. Wolf
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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影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
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期刊:
The Astrophysical Journal
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影响因子:
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