On the Question of Interstellar Diamonds

Details On the Question of Interstellar Diamonds On the Question of Interstellar Diamonds

Nov 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969natur.224..570d&link_type=abstract

Nature, Volume 224, Issue 5219, pp. 570 (1969).

Physics

5

Scientific paper

THE evidence to support the recent proposal1 that interstellar extinction may be caused by small diamond crystals is open to substantial criticism. Wickramasinghe2 has shown that the optical properties of diamond do not readily provide an explanation of the observed interstellar curve. Similar calculations made by us support and extend Wickramasinghe's results. It may be possible to modify the form of the size distribution until the interstellar extinction curve is reproduced as Greenberg and Shah3 have done for ``dirty ice'' grains. For diamond, however, considerable variation in the slope occurs in the infrared and it is not obvious that it will be possible simultaneously to fit the infrared, visible and ultraviolet regions.

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