Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...454..233h&link_type=abstract
Astrophysical Journal v.454, p.233
Astronomy and Astrophysics
Astronomy
16
Ism: Jets And Outflows, Line: Formation, Polarization, Radiative Transfer, Scattering
Scientific paper
The techniques of Henney (1994) for interpreting spectropolarimetric observations of emission-line scattering are extended to cover moderately optically thick cases and cases in which the scatterers are dust particles with a size that is not negligible compared with the wavelength of the scattered light. Particular attention is paid to the problem of the scattering of the emission lines from a light source moving within a cloud of dust. It is found that in many cases it is possible to infer the three-dimensional relative velocity vector between the emitting source and the scattering cloud from observations of the scattered spectra from two different areas of the cloud. This method of spectropolarimetric tomography is largely insensitive to the scattering phase function of the dust and to the optical depth of the cloud, showing that approaches based on the single-scattering assumption have a surprisingly broad range of validity.
Axon David J.
Henney William J.
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