Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-01-30
Astronomy and Astrophysics
Astrophysics
21 pages, 11 figures
Scientific paper
10.1086/'529115'
The results from a Hubble Space Telescope (HST) snapshot survey of post-AGB objects are shown. The aim of the survey is to complement existing HST images of PPN and to connect various types of nebulosities with physical and chemical properties of their central stars. Nebulosities are detected in 15 of 33 sources. Images and photometric and geometric measurements are presented. For sources with nebulosities we see a morphological bifurcation into two groups, DUPLEX and SOLE, as previous studies have found. We find further support to the previous results suggesting that this dichotomy is caused by a difference in optical thickness of the dust shell. The remaining 18 sources are classified as stellar post-AGB objects, because our observations indicate a lack of nebulosity. We show that some stellar sources may in fact be DUPLEX or SOLE based on their infrared colors. The cause of the differences among the groups are investigated. We discuss some evidence suggesting that high progenitor-mass AGB stars tend to become DUPLEX post-AGB objects. Intermediate progenitor-mass AGB stars tend to be SOLE post-AGB objects. Most of the stellar sources probably have low mass progenitors and do not seem to develop nebulosities during the post-AGB phase and therefore do not become planetary nebulae.
de Steene Griet C. Van
Meixner Matthew
Siódmiak Natasza
Sugerman Ben E. K.
Szczerba Ryszard
No associations
LandOfFree
HST Snapshot Survey of Post-AGB Objects 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 HST Snapshot Survey of Post-AGB Objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HST Snapshot Survey of Post-AGB Objects will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-121384