Titlebook: Late Stages of Stellar Evolution; Proceedings of the W S. Kwok,S. R. Pottasch Conference proceedings 1987 D. Reidel Publishing Company, Dor

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Identification of Cool Iras Sourcesese objects one would expect to find late AGB objects (Mira variables, carbon stars, OH/IR stars) and also proto- and young planetary nebulae. Objects at the tip of the AGB and planetary nebulae would be expected to be non-variable; the others would be expected to vary.

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The Period-Luminosity Relationship for Mira-Like Variables in the LMCer period (>250.) members of the sample are carbon stars..The M-type variables follow the relationship.Ko = (-3.79 ± 0.18) log P (days) + (20.17 ± 0.42) and have an r.m.s. scatter of only 0.13 mag about it.

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OH/IR Stars in the Galactic Centrebservatory (NRAO). in New Mexico, USA. The observations have been carried out and the data reduction is now under way at Onsala Space Observatory, Sweden. The 3-σ sensitivity is about 30 mJy and the survey is expected to yield a total number of about 200 OH/IR stars. The main goal is to determine the mass density distribution around the GC.

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978-94-010-8196-2D. Reidel Publishing Company, Dordrecht, Holland 1987

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Late Stages of Stellar Evolution978-94-009-3813-7Series ISSN 0067-0057 Series E-ISSN 2214-7985

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Astrophysics and Space Science Libraryhttp://image.papertrans.cn/l/image/581782.jpg

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Mass Loss from Carbon Stars — Observations of the CO Millimeter Wavelength Rotational LinesMore than 100 evolved, mass losing cool giants have been detected in CO rotational line emission with single-dish telescopes. These observations give information about kinematics, mass loss rates and composition for the evolved stars and can be used to study the evolution to planetary nebulae.

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ists, palaeontologists and palaeopathologists in the techniques of microscopy undoubtedly stems from a host of solid contributions these techniques have made in helping to understand the nature and mechanism of the processes of fossilization, as well as of a variety of diagenetic changes that buried