Resolving the Circumstellar Disks of V892 Tau and PV Cep: An Unusual Case

Astronomy and Astrophysics – Astronomy

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Scientific paper

The influence of the intermediate-mass Herbig stars on their circumstellar disks is still not well studied and understood. I present new sub-arcsecond radio interferometric CARMA and VLA observations of two disks around two interesting Herbig Ae stars that are in completely different evolutionary stages: V892 Tau & PV Cep. I resolved for the first time their disks as well as the PV Cep outflow. The very young (< 1 Myr) PV Cep disk is the youngest resolved disk around any Herbig Ae star.
By probing these two disks properties, I found that these are consistent with their corresponding stellar ages. But, unlike in the youngest T Tauri and Class 0 stars, the PV Cep disk contains ISM-like unprocessed dust. PV Cep case suggests that the evolutionary processes of Herbig Ae and T Tauri disks could be different in their earliest stages. I discuss the influence of PV Cep on its disk evolution and how this differs from the lower-mass T Tauri stars.

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