Polarization and the ratio of total-to-selective extinction

Details Polarization and the ratio of total-to-selective extinction Polarization and the ratio of total-to-selective extinction

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96..695c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Aug. 1988, p. 695-700.

Astronomy and Astrophysics

Astronomy

53

Interstellar Extinction, Polarized Electromagnetic Radiation, Spectrum Analysis, Astronomical Netherlands Satellite, Interstellar Matter, Iue, Line Of Sight, Particle Size Distribution

Scientific paper

Relationships between extinction and polarization parameters are explored using ultraviolet (ANS and IUE), visual, and infrared data along the same lines of sight. In particular, the well-known empirical relationship between polarization and extinction, p ≤ 9.0E(B-V), has been re-examined using lines of sight for which RV, the ratio of total-to-selective extinction, is known. It is found that the amount of polarization per unit extinction p/AV is related to RV such that the maximum observed value of p/AV is smaller for large RV. This implies that large grains are not efficient at producing polarization, which may be attributed to a reduced axial ratio or to less efficient alignment.

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