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By J. Mayo Greenberg (auth.), J. Mayo Greenberg, H. C. Van De Hulst (eds.)
IAU Symposium quantity fifty two on Interstellar airborne dirt and dust and similar subject matters used to be held at Albany, N.Y., at the campus of the country collage of recent York at Albany from could 29 to June 2, 1972. The contributors of the Organizing Committee have been: Dr A. D. Code, college of Wisconsin, Madison, Wis., U.S.A. Dr B. D. Donn, Goddard house Flight middle, Greenbelt, Md., U.S.A. Dr A. Elvius, Stockholm Observatory, Saltsjobaden, Sweden. Dr T. Gehrels, Lunar and Planetary Laboratory, collage of Arizona, Tucson, Ariz., U.S.A. Dr J. M. Greenberg (Chairman), kingdom collage of latest York at Albany, Albany, N.Y., U.S.A. Dr H. C. van de Hulst, Sterrewacht, Leiden, Holland. Dr S. B. Pikel'ner, Sternberg Astronomical Institute, Moscow, U.S.S.R. Dr E. E. Salpeter, Cornell collage, Ithaca, N.Y., U.S.A. Dr B. E. Turner, nationwide Radio Astronomy Observatory, Charlottesville, Va., U.S.A. The recommendation used to be first made in 1971 symposium on interstellar grains will be well timed. The reaction to the 1st initial statement, which used to be despatched out on November 29, 1971, used to be well past our expectancies. The assembly was once in the neighborhood backed by way of the country collage and via Dudley Observatory. The nationwide Aeronautics and area management and the nationwide technological know-how beginning con tributed besides the IAU. there have been 158 contributors of whom forty nine have been from 15 international locations outdoor the USA. a complete of ninety two papers have been presented.
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Rodgers, A. : 1959, Monthly Notices Roy. Astron. , 120, 163. : 1968, Stars and Stellar Systems 7, 1. : 1929, Harvard Bull. 13, 870. : 1960a, Arkhl. Astron. 2,429. : 1960b, Arkiv. Astron. 2, 45 I. Whitford, A. : 1958, Astron. J. 63, 201. INTERSTELLAR DUST: OBSERVATIONS IN THE UL TRA VIOLET AND THEIR INTERPRET A TIONS ADOLF N. A. Abstract. Recent observations of interstellar extinction and diffuse galactic light in the ultraviolet are interpreted in terms of a bi-modal size distribution of interstellar grains.
All Rights Reserved. Copyright (C) 1973 by the IAU. 30 J. H. LUTZ The value of R for the line-of-sight to each planetary is shown in Table I. NGC 6741 and IC 1747 are optically thick, so the values of R for these nebulae are lower limits to the true values of R. 0 in the value of R derived. References Cahn, I. H. and Kaler, I. : 1971, Astrophys. J. Suppl. 22,319. Lutz, I. : 1973, Astrophys. J. 181,135. Lutz, I. H. and Lutz, T. : 1972, Astron. J. 77, 376. Whitford, A. : 1958, Astron. J. 63, 201.
10. The ultraviolet color spans the wavelengths 2175 and 3500 A and was obtained from near ultraviolet scanner data. The colors plotted have been corrected to intrinsic colors by application of the 'average' extinction curve shown in Figure 1. One can see that the near ultraviolet color correlates well with (B - V)o and there are no pronounced luminosity class effects. 95 j;) of the stars are contained in a band ± O~ 15 from the dashed line (a visual estimate of the mean relation). We can conclude that a star's (B- V)o is a good measure of its intrinsic near ultraviolet energy distribution.