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Bi-Abundance Ionisation Structure of the Wolf-Rayet Planetary Nebula PB 8

Danehkar, A.

The planetary nebula PB 8 around a [WN/WC]-hybrid central star is one of planetary nebulae with moderate abundance discrepancy factors (ADFs 2-3), which could be an indication of a tiny fraction of metal-rich inclusions embedded in the nebula (bi-abundance). In this work, we have constructed photoionisation models to reproduce the optical and infr…

Unbiased Large Spectroscopic Surveys of Galaxies Selected by SPICA Using Dust Bands

Pozzi, F.; Scott, D.; Wang, L. +27 more

The mid-infrared range contains many spectral features associated with large molecules and dust grains such as polycyclic aromatic hydrocarbons and silicates. These are usually very strong compared to fine-structure gas lines, and thus valuable in studying the spectral properties of faint distant galaxies. In this paper, we evaluate the capability…