Large-scale polarimetry of large optical galaxies

Details Large-scale polarimetry of large optical galaxies Large-scale polarimetry of large optical galaxies

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999astl...25..697s&link_type=abstract

Astronomy Letters, Volume 25, Issue 11, November 1999, pp.697-705

Astronomy and Astrophysics

Astronomy

3

Scientific paper

We present preliminary results of wide-field visual CCD polarimetry for large optical galaxies through a concentric multisector radial-tangential polaroid analyzer mounted at the intermediate focus of a Zeiss-1000 telescope. The mean degree of tangential polarization in a 13-arcmin field, which was determined by processing images with imprinted ``orthogonal'' sectors, ranges from several percent (M 82) and 0.51% (the spirals M 51, M 81) to lower values for elliptical galaxies (M 49, M 87). It is emphasized that the parameters of large-scale polarization can be properly determined by using physical models for galaxies; inclination and azimuthal dependences of the degree of polarization are given for spirals.

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