Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...162...99s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 162, no. 1-2, July 1986, p. 99-102. SERC-supported research.
Astronomy and Astrophysics
Astronomy
Cool Stars, Polarimetry, Polarization Characteristics, Radio Jets (Astronomy), Interstellar Matter, Pre-Main Sequence Stars, Rayleigh Scattering, Stellar Evolution
Scientific paper
The wavelength dependent polarization of the jet in the VY Canis Majoris system is derived. By using existing polarimetric observations of the central star and of the whole complex, including a measurement of the jet-like part of nebula in isolation, the jet polarization is calculated at five wavelengths. It is shown that two separate polarigenic mechanisms are present and the behavior of the overall polarization is calculated for a combination of Rayleigh scattering in the jet and stellar aureole radiation, which is shown to be partially depolarized. Good agreement between calculated and observed polarizations is obtained. The small (under 1 percent) interstellar component of polarization can be safely neglected in this discussion. A possible diagnostic for the evolutionary status of the central star in VY Canis Majoris is indicated.
Aspin Colin
Schwarz Hugo E.
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