Dust Distribution in [WR] Planetary Nebulae: a Case of M2-43

Abstract

Simultaneous presence of O- and C-rich molecules and/or dust is commonly known as mixed or dual chemistry. C-rich [WR] central stars show at the same time the presence of polycyclic aromatic hydrocarbons (PAHs) and crystalline silicates in their nebulae. We perform radiative transfer modeling of ISO spectrum for M2-43 to determine spatial location of PAHs and crystalline silicates inside the nebula. This allows us to discuss the origin of mixed chemistry in [WR] planetary nebulae.