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The interstellar medium near stars with peculiar interstellar polarizations

Cohen, Judith G. (1977) The interstellar medium near stars with peculiar interstellar polarizations. Astrophysical Journal, 214 . pp. 86-91. ISSN 0004-637X. doi:10.1086/155232.

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The properties of the interstellar medium along the line of sight to the small number of stars whose wavelength of maximum interstellar polarization is greater than or equal to 6500 Å are studied. The optical interstellar line measurements reported here confirm the hypothesis that the long λ_(max) phenomenon occurs in regions where the mean grain size is abnormally large, and that this takes place only in the densest parts of the interstellar medium. The grains grow by accretion from the gas, not by coalescence of previously existing grains. Furthermore, the material accreted in the dense clouds (i.e., the mantle) must have a different chemical composition from the grain core; it must consist of substances composed largely of hydrogen

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Cohen, Judith G.0000-0002-8039-4673
Additional Information:© American Astronomical Society • Provided by the NASA Astrophysics Data System. Received 1976 September 21. We thank G. Grasdalen for helpful advice on NGC2024.
Subject Keywords:interstellar: abundances — interstellar: matter — polarization
Record Number:CaltechAUTHORS:20190529-161903134
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95908
Deposited By: George Porter
Deposited On:31 May 2019 14:55
Last Modified:16 Nov 2021 17:16

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