Spectropolarimetry of the 5797 A diffuse interstellar band

Details Spectropolarimetry of the 5797 A diffuse interstellar band Spectropolarimetry of the 5797 A diffuse interstellar band

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...398l..69a&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 398, no. 1, p. L69-L72.

Other

9

Astronomical Polarimetry, Interstellar Extinction, Interstellar Matter, Spectral Bands, Stellar Spectrophotometry, Cosmic Dust, Linear Polarization, Spectral Line Width

Scientific paper

This paper reports new spectropolarimetry of 5797 A and other DIBs in the 5600-6000 A region. Results are in all cases negative: there is no detectable excess polarization in the features. We conclude that if dust grains are responsible for the 5797 A feature, they are not alignable, yet these same grains apparently give rise to a significant fraction of the observed interstellar extinction. Carbon-rich small grains appear to be the most likely solid-state carriers.

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