Volume 552, April 2013
|Number of page(s)||7|
|Section||Interstellar and circumstellar matter|
|Published online||03 April 2013|
Mid-infrared observations of the circumstellar disks around PDS 66 and CRBR 2422.8-3423
University of Kiel, Institute for Theoretical Physics and
Accepted: 6 March 2013
Aims. We present mid-infrared observations and photometry of the circumstellar disks around PDS 66 and CRBR 2422.8-3423, obtained with VISIR/VLT in the N band and for the latter also in the Q band. 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.
Methods. We 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.
Results. Neither 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+0.5 AU and <10.5-1.0+0.5 AU for PDS 66 and CRBR 2422.8-3423, respectively. The photometry we performed yields N-band flux densities of 599 ± 8 mJy for PDS 66 and 130 ± 14 mJy for CRBR 2422.8-3423, as well as a Q-band flux density of 858 ± 109 mJy for CRBR 2422.8-3423.
Key words: protoplanetary disks / stars: pre-main sequence / stars: individual: PDS 66 / stars: individual: CRBR 2422.8-3423 / planets and satellites: formation / radiative transfer
© ESO, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.