An AKARI-FIS survey of post-AGB stars and (proto) planetary nebulae: an analysis of extended emission and the spectral energy distribution

TL;DR

This study uses AKARI/FIS observations to analyze post-AGB stars and planetary nebulae, finding no evidence of extended circumstellar dust emission and providing spectral energy distributions for selected targets.

Contribution

First analysis of AKARI/FIS data showing lack of extended dust shells around post-AGB stars and PNe, with new spectral energy distributions presented.

Findings

No excess circumstellar dust emission detected.

Aperture flux measurements at multiple wavelengths.

Spectral energy distributions for selected objects.

Abstract

We present first preliminary results from AKARI/FIS pointed observations of post-AGB stars and planetary nebulae (PNe). A first analysis of the radial (azimuthally averaged) profile of the observed sources shows no evidence for excess emission due to the presence of circumstellar dust. No (detached) circumstellar faint dust-shells are seen in the image maps. Also, we present here first results of aperture flux photometry at wavelengths of 65, 90, 140 and 160 micron. Results are compared with IRAS flux densities as well as the beta release of the FIS Bright Source Catalog. Finally, spectral energy distributions are given, by way of an example, for two individual targets in our sample.