Linear polarization variations of six T Tauri stars

Details Linear polarization variations of six T Tauri stars Linear polarization variations of six T Tauri stars

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...120..203s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 120, no. 2, April 1983, p. 203-214. Sponsorship: Deutsche Forschungsgemeinscha

Astronomy and Astrophysics

Astrophysics

17

Linear Polarization, Polarimetry, T Tauri Stars, Secular Variations, Tables (Data), Wavelengths

Scientific paper

Linear polarization observations of the T Tauri stars RY Tau, DR Tau, SU Aur, RW Aur, V1331 Cyg, and DI Cep are presented. Two of these stars were known to show variable polarization. The four remaining stars are also identified to be polarimetric variables. The wavelength dependence of the polarization is consistent with the presence of dust grains (with a large range of sizes) in asymmetric circumstellar envelopes. The polarization varies irregularly on a time scale down to days. Periodic variation could not be detected. For RW Aur, the trajectory of the polarization vector in the Stokes parameter plane suggests short-term mass flow variations with a fixed axis of symmetry. The intrinsic position angle of RY Tau rotates in the Stokes parameter plane with a time scale of months, indicating that scattering material orbiting around this star might be observed.

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