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  1. No Access

    Chapter

    Spectroscopic Study of Carbon Stars with the ISO-SWS

    We have observed ten carbon stars with different mass-loss rates using the Short Wavelength Spectrometer (SWS) on board ISO. We found that not only the spectral energy distribution and the dust features, but t...

    I. Yamamura, T. De Jong, K. Justtanont, J. Cami… in Astrophysics and Space Science (1998)

  2. No Access

    Chapter and Conference Paper

    ISO-SWS Spectra of AGB Stars

    In this contribution, we present a few highlights of the guaranteed time program to observe AGB stars with differing chemical compositions and mass loss rates using ISO 1 SWS. We briefly discuss C2H2 absorption i...

    K. Justtanont, I. Yamamura, T. De Jong… in Dust and Molecules in Evolved Stars (1998)

  3. No Access

    Chapter

    Circumstellar Silicate Mineralogy

    This paper reviews spectra obtained with the SWS on board of ISO of dust shells around O-rich objects. These spectra reveal the presence of many new emission features between 10 and 45 µm. These bands are general...

    A. G. G. M. Tielens, L. B. F. M. Waters, F. J. Molster… in Astrophysics and Space Science (1998)

  4. No Access

    Chapter and Conference Paper

    Observations of High CO Rotational Lines in Post-Agbs and PN

    We present a preliminary interpretation of high CO rotational line data obtained from KAO. The possibility of either a PDR or a shock model is considered in order to explain the observations.

    K. Justtanont, A. G. G. M. Tielens, C. J. Skinner, M. R. Haas in Circumstellar Matter 1994 (1995)

  5. No Access

    Chapter and Conference Paper

    The Onset of Axial Symmetry in Protoplanetary Nebulae

    We have obtained resolved IR images, at wavelengths from 1.2μm to 12.5μm, of a small sample of protoplanetary nebulae. The results suggest that all PPNe are axially, not spherically, symmetric, that spherical sym...

    C. J. Skinner, M. Meixner, M. J. Barlow, K. Justtanont… in Circumstellar Matter 1994 (1995)

  6. No Access

    Chapter and Conference Paper

    Mid-Infrared Spectroscopy of Four 21μm Emission Band Sources

    We report 10 and 20μm spectroscopic observations of four C-rich post-AGB objects which exhibit the unidentified emission feature at 21μm. The observations were carried out in October 1990 and May 1991 using CGS3 ...

    K. Justtanont, M. J. Barlow, C. J. Skinner in Planetary Nebulae (1993)

  7. No Access

    Chapter and Conference Paper

    Mid-IR Spectra of AGB and Post-AGB Stars

    We have generated models of complete nova energy distributions, including the effects of the nova dust shell emission and absorption. In order to account for the dust, we require optical constants throughout t...

    C. J. Skinner, M. J. Barlow, K. Justtanont, R. J. Sylvester in Planetary Nebulae (1993)