New groups of planetary nebulae with peculiar dust chemistry towards the Galactic bulge

Abstract

We investigate Galactic bulge planetary nebulae without emission-line central stars for which peculiar infrared spectra have been obtained with the Spitzer Space Telescope, including the simultaneous signs of oxygen and carbon based dust. Three separate sub-groups can be defined characterized by the different chemical composition of the dust and the presence of crystalline and amorphous silicates. We find that the classification based on the dust properties is reflected in the more general properties of these planetary nebulae. However, some observed properties are difficult to relate to the common view of planetary nebulae. In particular, it is challenging to interpret the peculiar gas chemical composition of many analyzed objects in the standard picture of the evolution of planetary nebulae progenitors. We confirm that the dual-dust chemistry phenomenon is not limited to planetary nebulae with emission-line central stars.

17 pages, 13 figures

References in corpus (15)

• Binary Planetary Nebulae Nuclei towards the Galactic Bulge. I. Sample Discovery, Period Distribution and Binary Fraction
• Binary planetary nebulae nuclei towards the Galactic bulge. II. A penchant for bipolarity and low-ionisation structures
• Lithium and zirconium abundances in massive Galactic O-rich AGB stars
• Spitzer Infrared Spectrograph Observations of Magellanic Cloud Planetary Nebulae: the nature of dust in low metallicity circumstellar ejecta
• Elemental abundances of Galactic bulge planetary nebulae from optical recombination lines
• The mixed chemistry phenomenon in Galactic Bulge PNe
• Technetium and the third dredge up in AGB stars II. Bulge stars
• Planetary nebulae in the direction of the Galactic bulge: On nebulae with emission-line central stars
• Planetary nebulae with emission-line central stars
• Chemical Abundances and Dust in Planetary Nebulae in the Galactic Bulge
• Abundances in the Galactic bulge: results from planetary nebulae and giant stars
• Spitzer detection of PAH and silicate features in post-AGB stars and young Planetary Nebulae
• White dwarf masses derived from planetary nebulae modelling
• The Acceleration of the Nebular Shells in Planetary Nebulae in the Milky Way Bulge
• Central stars of planetary nebulae in the Galactic bulge

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• Characterization of M-stars in the LMC in the JWST era
• Dust Properties in the Galactic Bulge
• Chemical Abundances in the PN Wray16-423 in the Sagittarius Dwarf Spheroidal Galaxy: Constraining the Dust Composition