Mid and Far Infrared Photometry of Galactic Planetary Nebulae with the AKARI All Sky Survey

Abstract

We provide mid- and far-infrared photometry of 857 Galactic planetary nebulae (PNe) using data derived from the AKARI All-Sky Survey. These include fluxes at 9 and 18 μm obtained with the Infrared Camera (IRC), and at 65, 90, 140 and 160 μm using the far-Infrared Surveyor (FIS). It is noted that the IR luminosities of the youngest PNe are comparable to the total luminosities of the central stars, and subsequently decline to ~ 5102 L where D > 0.08 pc. This is consistent with an evolution of PNe dust opacities, and appreciable absorption in young and proto-PNe. We also note that whilst there is little evidence for the evolution in IR/radio flux ratios suggested by previous authors. The fall-off in dust temperatures is similar to that determined in previous studies, whilst levels of Ly heating are < 0.5 of the total energy budget of the grains. There appears to be an evolution in the infrared excess (IRE) as nebulae expand, with the largest values occurring in the most compact PNe.

76 pages, 13 figures (1 in color), 2 tables

References in corpus (4)

• MASH-II: More Planetary Nebulae from the AAO/UKST HαSurvey
• Spitzer IRAC observations of newly-discovered planetary nebulae from the Macquarie-AAO-Strasbourg H-alpha Planetary Nebula Project
• The Halo and Rings of the Planetary Nebula NGC 40 in the Mid-Infrared
• MIPSGAL 24 μm Observations of Galactic Planetary Nebulae

Cited by in corpus (2)

• PAH Formation in O-rich Planetary Nebulae
• Study of the extended radio emission of two supernova remnants and four planetary nebulae associated to MIPSGAL bubbles