The wavelength dependence of optical polarization in the galaxy M82

Details The wavelength dependence of optical polarization in the galaxy M82 The wavelength dependence of optical polarization in the galaxy M82

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191..349c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 191, May 1980, p. 349-366. Research supported by the Science Research C

Astronomy and Astrophysics

Astronomy

14

Galaxies, Optical Polarization, Red Shift, Stellar Models, Halos, Light Scattering, Optical Thickness, Wavelengths

Scientific paper

New polarization data are presented for the galaxy M82 in red light using the Durham polarimeter and a McMillan electronographic camera. The degree of polarization was substantially smaller than for previously obtained blue data; the results indicate a NW-SE asymmetry in the polarized intensity together with a dilution by redder unpolarized light. The required brightness distribution and optical thickness of the disk appear reasonable, and a fairly constant halo dust density is predicted. It is concluded that dilution could result from halo starlight or intrinsic gas emission; however, the latter is unlikely unless gas emission is extremely strong at intermediate distances along the minor axis of the galaxy.

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