000001992 001__ 1992
000001992 005__ 20160706150739.0
000001992 0247_ $$2DOI$$a10.1086/529115
000001992 037__ $$aASTROimport-149
000001992 100__ $$aSiódmiak, N.
000001992 245__ $$aHubble Space Telescope Snapshot Survey of Post-AGB Objects
000001992 260__ $$c2008
000001992 520__ $$aThe results of a Hubble Space Telescope (HST) snapshot survey of post-AGB objects are shown. The aim of the survey is to complement existing HST images of protoplanetary nebulae and to connect various types of nebulosities with the physical and chemical properties of their central stars. Nebulosities are detected in 15 of 33 sources. Images and photometric and geometric measurements are presented. For sources with nebulosities we see a morphological bifurcation into two groups, DUPLEX and SOLE, as previous studies have found. We find further support for the previous results, suggesting that this dichotomy is caused by a difference in the optical thickness of the dust shell. The remaining 18 sources are classified as stellar post-AGB objects, because our observations indicate a lack of nebulosity. We show that some stellar sources may in fact be DUPLEX or SOLE objects based on their infrared colors. The causes of the differences among the groups are investigated. We discuss some evidence suggesting that high progenitor mass AGB stars tend to become DUPLEX post-AGB objects and intermediate progenitor mass AGB stars tend to become SOLE post-AGB objects. Most of the stellar sources probably have low-mass progenitors and do not seem to develop nebulosities during the post-AGB phase; therefore, they do not become planetary nebulae.
000001992 700__ $$aMeixner, M.
000001992 700__ $$aUeta, T.
000001992 700__ $$aSugerman, B. E. K.
000001992 700__ $$aVan de Steene, G. C.
000001992 700__ $$aSzczerba, R.
000001992 773__ $$c382-400$$i1$$pThe Astrophysical Journal$$v677$$y2008
000001992 85642 $$ahttp://esoads.eso.org/abs/2008ApJ...677..382S
000001992 905__ $$apublished in
000001992 980__ $$aREFERD