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Carbon altotropic composition of interstellar grains
Author(s) -
Maron N.
Publication year - 1989
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113100417
Subject(s) - extinction (optical mineralogy) , astrophysics , cosmic dust , stars , physics , interstellar medium , carbon fibers , amorphous carbon , interstellar ice , interstellar cloud , astronomy , molecular cloud , materials science , galaxy , composite number , optics , composite material , raman spectroscopy
Extinction curves for core‐mantle and muiticored grains containing two allotropic carbon modifications are compared with far UV extinction observations of the stars R CrB and RY Sgr as well as interstellar extinction. We show that these grain models are consistent with the observed far UV extinction, but it is found that only those particles in which amorphous carbon is surrounded by graphite fit well the interstellar extinction curve and that of the R CrB‐type stars.