Polarization profiles of scattered emission lines. II. Upstream dust scattering in the HH 1 jet

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Title: Polarization profiles of scattered emission lines. II. Upstream dust scattering in the HH 1 jet
Author: Henney, William; Raga, Alejandro; Axon, David
Abstract: Detailed comparisons are made between observations of scattered light upstream of the head of the 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 2that the scattering dust must have a very forward-throwing scattering phase function ($\langle\cos\theta\rangle\msim 0.7$) and slight evidence is found for a dust-gas ratio that is higher than average. (Refer to PDF file for exact formulas).
Description: Also archived in: arXiv:astro-ph/9403026 v1 11 Mar 1994 AND Instituto de Astronomía de la Universidad Nacional Autónoma de México contribution #340
Record URI: http://hdl.handle.net/1850/1912
Date: 1994-05-20

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