APERTURE SYNTHESIS IMAGING OF V892 Tau AND PV Cep: DISK EVOLUTION
- Stratospheric Observatory for Infrared Astronomy, NASA Ames Research Center, MS N211-3, Moffett Field, CA 94035 (United States)
I present a study of two Herbig Ae stars that are in completely different evolutionary stages: V892 Tau and PV Cep. Using sub-arcsecond interferometric observations obtained with the Combined Array for Research in Millimeter-wave Astronomy at {lambda} = 1.3 and 2.7 mm, 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 {approx}0.03 M{sub sun}. These values correspond to the growth of its dust into large, up to centimeters size, structures. In contrast, the very young (a few x10{sup 5} yr) PV Cep has a quite high opacity index {beta} = 1.75 and a more massive disk 0.8 M{sub sun}. 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 interstellar-medium-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.
- OSTI ID:
- 21464710
- Journal Information:
- Astrophysical Journal, Vol. 722, Issue 1; Other Information: DOI: 10.1088/0004-637X/722/1/204; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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