Inventory of dust features in Galactic Bulge PNe.
Abstract
Galactic bulge planetary nebulae (GBPNe) are characterized by very frequent occurrence of so-called mixed chemistry. The mixed chemistry in case of planetary nebulae usually means the simultaneous presence of Polycyclic Aromatic Hydrocarbon (PAH) features in the 6-14 micrometer range and crystalline silicates beyond 20 micrometer in the spectra. However, in case of GBPNe another type of mixed chemistry is observed, which is characterized by the presence of PAHs and amorphous forms of silicates. In addition, some planetary nebulae exhibit only amorphous and crystaline silicate features, while others show only PAH features. In the light of this diversity in fairly well defined environment of GB we investigated correlations between different dust properties and physico-chemical properties of these nebulae and their central stars. During my presentation I would like to introduce the classification scheme of dust and characterize each group by their specific chemical and physical parameters.
- Publication:
-
Asymmetrical Planetary Nebulae VI Conference
- Pub Date:
- April 2014
- Bibcode:
- 2014apn6.confE.112S
- Keywords:
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- stars: planetary nebulae;
- planetary nebulae: general