The effect of the magnetic field on the linear polarization spectrum of radiation from T Tauri-type stars

Details The effect of the magnetic field on the linear polarization spectrum of radiation from T Tauri-type stars The effect of the magnetic field on the linear polarization spectrum of radiation from T Tauri-type stars

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65..366g&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, Mar.-Apr. 1988, p. 366-380. In Russian.

Astronomy and Astrophysics

Astronomy

2

Linear Polarization, Magnetic Effects, Stellar Radiation, T Tauri Stars, Faraday Effect, Infrared Astronomy, Optical Thickness, Stellar Envelopes

Scientific paper

Spectral distribution of intrinsic linear polarization of radiation of T Tauri-type stars RY Tau, T Tau, SU Aur, RW Aur, and DI Cep has been found. It is shown that the degree of polarization of these stars (except for RY Tau in its low-brightness state) is determined by the optical thickness of the electron shell, and the shape of the wavelength dependence and the location of maximum polarization - by the magnetic field strength. All the observed variations of the polarization spectrum of T Tauri-type stars can be accounted for by the influence of a variable magnetic field, as a result of the Faraday rotation effect. The estimates of magnetic fields of T Tauri-type stars depend on the model of the circumstellar shell: for spherical shells the estimated value of the magnetic field lies between 100 and 500 G, whereas for ellipsoidal shells - between 400 and more than 1000 G.

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