Contents of: VI/111/./abstract/JALCOLEA_BIP_PPNE.abs

The following document lists the file abstract/JALCOLEA_BIP_PPNE.abs from catalogue VI/111.
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 We propose to use ISOCAM to map the dust emissivity in some
 young post-AGB stars. These type of objects represent a key
 piece of information for understanding the shaping of PNe.
 For the selected objects we have observational evidences
 of that the bipolar processes, responsible for the breaking
 of the spherical symmetry in PNe, have already reach a
 stage of development that make them detectable with arcsecond

 We will observe their IR emission with several filters
 covering the whole operational range of ISOCAM and using
 a pixel field of view of 1.5". These observations will
 allow us to study the properties of the dust in these
 envelopes (temperature, distribution of the mass and of some
 dust spectral features: silicates, ice). We will
 also analyze the recent mass loss history of their central
 stars. We also expect to resolve the dust structures
 associated with the bipolarity of the object (a collimating
 disk, the interaction of the two winds, etc.), which will
 allow us to test the current theories for the shaping of PNe.

 Finally, the comparison of the dust properties derived from
 the ISOCAM observations with those for the neutral gas (obtained
 from other ongoing projects) will be of fundamental importance,
 expecially for the study of the late-AGB and post-AGB mass
 losses and of the chemical processes that occur during this
 post-AGB evolution.

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