Polarization profiles of scattered emission lines. II. General formalism
for optically thin Rayleigh scattering
W. J. Henney, IA-UNAM, Mexico
A. C. Raga, UMIST, Manchester, UK
D. J. Axon, NRAL, UK
Astrophysical Journal 427, 288-304
Abstract:
Detailed comparisons are made between observations
of scattered light upstream of the head of the Herbig-Haro (HH) 1 jet
and predictions of simple scattering models. It is shown that, in
order to unambiguously determine the velocity of the head of the jet
(bow shock) with respect to the upstream dust, existing spectroscopic
observations are insufficient and that spectropolarimetric
observations of the scattered light are necessary. Such an independent
measure of the bow shock velocity is important in order to test
'multiple outflow' theories of Herbig-Haro jets. It is also shown that
the scattering dust must have a very forward-throwing scattering phase
function (cos theta approx 0.7), and slight evidence is found for a
dust-gas ratio that is higher than average.
Available as.............
Will Henney <will@astroscu.unam.mx>
Last modified: Tue Dec 19 16:44:51 CST 1995