Search for polarization of the 3.3 and 11.3-micron interstellar emission features

Details Search for polarization of the 3.3 and 11.3-micron interstellar emission features Search for polarization of the 3.3 and 11.3-micron interstellar emission features

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...196..252s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 196, no. 1-2, May 1988, p. 252-254.

Astronomy and Astrophysics

Astronomy

8

Cyclic Hydrocarbons, Infrared Astronomy, Interstellar Matter, Interstellar Radiation, Linear Polarization, Nebulae, Spectral Emission, Gas Ionization, Interstellar Magnetic Fields, Orion Nebula, Polarimeters

Scientific paper

The authors have searched for linear polarization of the 3.3 and 11.3 μm emission features in the Orion ionization front, NGC 7027, HD 44179 (the Red Rectangle), NGC 2023, BD +30°3639, and Elias 1. Recent theoretical calculations have predicted that if these features are due to polycyclic aromatic hydrocarbons (PAHs) they may be linearly polarized in many astronomical situations. The most sensitive measurements of and upper limits on the feature polarization are 1% at 3.3 μm and 3% at 11.3 μm.

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