Elemental depletions and the 217.5 NM interstellar feature

Details Elemental depletions and the 217.5 NM interstellar feature Elemental depletions and the 217.5 NM interstellar feature

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.112..321d&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 112, no. 2, May 1985, p. 321-324.

Astronomy and Astrophysics

Astrophysics

6

Interstellar Extinction, Interstellar Matter, Magnesium, Silicon, Carbon, Depletion

Scientific paper

The broad, intense, 217.5 nm feature observed in interstellar extinction has been noted to correlate well with such other extinction parameters as E(B-V). Data on elemental depletions for a number of important grain materials have become available for the examination of possible correlations between the strength of the 217.5 nm band and these quantities. Evidence is presently furnished for the 217.5 nm feature's arising in small particles of (Mg, Si) oxide or Mg-silicate composition. The strongest negative correlation is with the presence of carbon, suggesting that the feature is not produced by graphite grains.

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