Serkowski's Empirical Relation for Interstellar Linear Polarization Viewed from Davis-Greenstein Alignment Mechanism

Details Serkowski's Empirical Relation for Interstellar Linear Polarization Viewed from Davis-Greenstein Alignment Mechanism Serkowski's Empirical Relation for Interstellar Linear Polarization Viewed from Davis-Greenstein Alignment Mechanism

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jkas...11...31h&link_type=abstract

Journal of the Korean Astronomical Society, vol. 11, no. 1, p. 31-36

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Scientific paper

Although Serkowski used a single value K = 1.15 in representing all the observed interstellar linear polarization curves by his empirical relation p(lambda)/Pmax = exp(-K ln^2(lambda_max/lambda)), where Pmax is the maximum polarization at wavelength lambda_max, we have noticed a meaningful variation in K from observations of 72 stars. By comparing Ks with Pmax/E(B-V) and with lambda_max, we have examined how the shape of the polarization curve is related with the degree of grain alignment on one had, and with grain sizes on the other. We have shown that correlations between K, Pmax/E(B-V), and lambda_max aare consistent with the idea of Davis-Greenstein mechanism for grain alignment.

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