By Andrea Preite Martinez

ISBN-10: 9400938918

ISBN-13: 9789400938915

ISBN-10: 9401082286

ISBN-13: 9789401082280

There are questions that we will be able to ask ourselves for you to describe this workshop. the 1st query is a double query: why a convention in this topic and why a workshop? the 1st proposal of organizing this workshop got here whereas analyzing the clinical goals of 1 of the tools onboard the ISO satel­ lite (a part A rfile about the IR camera). On dealing with the clinical motivations for construction the software i noticed with shock that no point out was once made from Planetary Nebulae (PN). at this time this is often now not precise. there's a bankruptcy indicating the functions of the digital camera within the PN box and what we will be able to quite count on from that tool. however it was once at this second that the 1st thought of organizing a workshop almost about PN got here. after all there are different, more desirable motivations. the 1st one is that i feel this can be the best second after IRAS. i believe all of us spent the final or 3 years engaged on IRAS facts. IRAS represented a corner-stone for these engaged on Planetary Nebulae: the volume of knowledge that got here out of the tools onboard the satellite tv for pc was once huge, immense and unfolded new methods of taking a look at planetary nebulae, in addition to at different fields.

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Additional resources for Planetary and Proto-Planetary Nebulae: From IRAS to ISO: Proceedings of the Frascati Workshop 1986, Vulcano Island, September 8–12, 1986

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Observed properties of dust in Planetary Nebulae. m) is generally weak and close to the level expected from free-free and bound-free transitions in ionized gas when extrapolated from observations in the visible and radio. m. The chemistry of the emitting dust reflects the abundances in the pn ejecta and this can be recognised through the presence of emission features in the infrared spectra. m requires relatively warm grains with T >200K. E 3 NGC 6543 •-"'-------... /'" - • ~ .... 100 ~ ;C ................

7 pm emission band and the C/O ratio in a small number of pn, giving further credence to the idea that the grains giving rise to the emission features form in C-rich environments. These results confirm the suggestion of Barlow (1983) that the pn showing strong emission in the narrow emission bands have very high carbon abundances with C/O >2. g. NGC 6543, NGC 7009). 05 pc, and contain similar amounts of cool dust to the other objects. There may be little dust close to the central star in these pn.

K. , 1983. , 202, 1233. , 1983. R. Flower, pl05. M. P. 1978. Nature, 271, 638. , Wooden, D. , 1986. , 302, 737. M. , 1983. Astr. Ap. 128, 325. , Adams, S. , 1982. , 199, 517. , 1982. " p 53. Amer. Inst. Phys. New York. K. , 1982. Astr. Ap. Suppl, 50, 209. , 1986. Astr. , 161, 363. , 1981. J. 247, 540. F. K. 1986. , 221, 63. , Purgathofer, A. , 1983. J. , 52, 399. C. , 1983. , 204, 53. , 1983. R. Flower p129. R. , 1983. , 265, 748. 3 pm? Roche: It is difficult to do properly because of the different beam sizes used for the observations.

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Planetary and Proto-Planetary Nebulae: From IRAS to ISO: Proceedings of the Frascati Workshop 1986, Vulcano Island, September 8–12, 1986 by Andrea Preite Martinez

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