Visual polarization measurements in the Cepheus flare

Details Visual polarization measurements in the Cepheus flare Visual polarization measurements in the Cepheus flare

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...270..444b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 270, no. 1-2, p. 444-450.

Astronomy and Astrophysics

Astrophysics

3

Astronomical Polarimetry, Interstellar Magnetic Fields, Interstellar Matter, Milky Way Galaxy, Molecular Clouds, Linear Polarization, Visible Spectrum

Scientific paper

We present polarization measurements on a stellar sample located in a large area in Cepheus. The observations were made with the 2-m telescope at the Pic du Midi (France), around 4350 A and with an accuracy of the polarization degree of the order of 0.0001. At large scales, we find that the galactic magnetic field as given by the direction of the polarization (alignment of the dust) is, roughly speaking, parallel to the galactic plane in the Cassiopeia cloud, with a scale size of the order of 100 pc, while it is turned by about 90 in the Cepheus cloud. At small scales, in both the Cepheus and the Cassiopeia clouds, the CO content has little correlation with the degree of polarization.

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