Parametric determination of the inclination, velocity and density structure of circumstellar discs from spectropolarimetric profiles of scattered lines

Kenneth Wood; John C. Brown

doi:10.1117/12.168572

15 February 1994 Parametric determination of the inclination, velocity, and density structure of circumstellar disks from spectropolarimetric profiles of scattered lines

Kenneth Wood, John C. Brown

Author Affiliations +

Proceedings Volume 2010, X-Ray and Ultraviolet Polarimetry; (1994) https://doi.org/10.1117/12.168572
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

An analytic treatment is presented which determines the spectropolarimetric line profiles resulting from single Thomson scattering of monochromatic stellar line radiation in a moving thin circumstellar disc. Expressions are obtained for the scattered Stokes fluxes in terms of the disc velocity and density profiles and the inclination of its rotation axis to the line of sight. The shape of the scattered polarimetric line profile contains information on the inclination and velocity and density distributions of the disc. It is shown that, under certain parametrizations of these distributions, analysis of spectropolarimetric line data yields the disc inclination and most of the other parameters of the system. The analysis presented may be applied to the Thomson scattering of any photospheric absorption or emission lines in circumstellar discs.

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Kenneth Wood and John C. Brown "Parametric determination of the inclination, velocity, and density structure of circumstellar disks from spectropolarimetric profiles of scattered lines", Proc. SPIE 2010, X-Ray and Ultraviolet Polarimetry, (15 February 1994); https://doi.org/10.1117/12.168572

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