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ISO SWS Spectroscopy of Proto-Planetary Nebulae

Volk, Kevin; Kwok, Sun; Hrivnak, Bruce J.

We are obtaining low- (SWS01) and medium-resolution (SWS06) spectra of PPNe to investigate spectral features arising in these transitional objects. Three sources with the 21 µm feature have been confirmed, one new source found, and evidence of some substructure seen.

Observation of Microstructures in Planetary Nebulae

Walsh, J. R.; Dudziak, G.

HST images of 5 Planetary nebulae showing small scale structures have been retrieved from the archives. For two PNe, NTT images were also available, and a double channel deconvolution technique applied to combine them to the HST images. A very precise flux calibration was performed on the HST images. Bow shocks and ionization effects are likely de…

Infrared Emissions from Metals in Carbon Stars and M Giant

Ohnaka, K.; Tsuji, T.; Aoki, W.

Dust and Atomic Gas in Post-AGB Envelopes

Meixner, M.

V 439 CYG as a Late Phase of Stellar Evolution

Rossi, C.; Viotti, R.; Norci, L. +2 more

Obscured AGB Stars in the LMC

Waters, L. B. F. M.; Whitelock, Patricia A.; Groenewegen, M. A. T. +5 more

HI Infrared Line Formation in Early B-Type Stars

Waters, L. B. F. M.; Marlborough, J. M.; Zaal, P. A.

R Coronae Borealis Stars, Dust, and Evolution

Clayton, Geoffrey C.

The ISO Spectrum of the Cloud Core M17-North

Henning, Th.; Klein, R.

Far-Infrared Photometry of Circumstellar Matter Around Intermediate Mass Stars

Burkert, A.; Ábrahám, P.; Henning, Th. +2 more