Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-08-11
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
15 pages, Accepted for publication in ApJ
Scientific paper
I present a study of two Herbig Ae stars that are in completely different evolutionary stages: V892 Tau and PV Cep. Using sub arc-second interferometric observations obtained with the Combined Array for Research in Millimeter-wave Astronomy (CARMA) at the 1.3 and 2.7 mm wavelengths, I have for the first time resolved their disks. I deduce that the 5 Myr old V892 Tau has a low dust opacity index $\beta$=1.1 and a disk mass of 0.03 $\msun$. These values correspond to the growth of its dust into large up to centimeters size structures. In contrast, the very young (a few 10$^5$yrs) PV Cep has a quite high opacity index $\beta$ =1.75 and a more massive disk 0.8 $\msun$. PV Cep has the youngest resolved disk around any Herbig Ae star. Unlike the youngest T Tauri and Class 0 stars, which contain large and processed grains, the young Herbig Ae star, PV Cep, disk contains ISM-like unprocessed dust. This suggests that PV Cep's dust evolution is slower than T Tauri stars'. I also present high spatial resolution interferometric observations of the PV Cep outflow. The outflow inclination is consistent with the orientation of the known Herbig-Haro flow in that region, HH315.
No associations
LandOfFree
Aperture Synthesis Imaging of V892 Tau and PV Cep: Disk Evolution does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Aperture Synthesis Imaging of V892 Tau and PV Cep: Disk Evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aperture Synthesis Imaging of V892 Tau and PV Cep: Disk Evolution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-480487