Interstellar polarization at 3.6 microns

Details Interstellar polarization at 3.6 microns Interstellar polarization at 3.6 microns

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1894j&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, June 1990, p. 1894-1896.

Astronomy and Astrophysics

Astronomy

8

Infrared Astronomy, Interstellar Extinction, Interstellar Matter, Optical Polarization, Absorption Spectra, Polarimetry, Silicates, Stellar Magnitude

Scientific paper

Broadband polarimetry at 3.6 microns is presented for six stars reddened by the interstellar medium. The observed polarization is higher than expected when compared to the predictions of grain models incorporating traditional, large, astronomical silicates. An extra absorbing component, probably broadband in nature, must be present on the large silicate grains. This absorption component must show a significant increase from 2 to 4 microns.

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