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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旧石器时代

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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Excise

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.

Thrombolysis

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