2D Speckle polarimetry of Z Canis Majoris

Details 2D Speckle polarimetry of Z Canis Majoris 2D Speckle polarimetry of Z Canis Majoris

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...334..969f&link_type=abstract

Astronomy and Astrophysics, v.334, p.969-975 (1998)

Astronomy and Astrophysics

Astrophysics

11

Polarization, Methods: Statistical, Techniques: Interferometric, Binaries: Close, Stars: Pre-Main Sequence, Infrared: Stars

Scientific paper

We present the first high angular resolution polarization measurements of the pre-main sequence binary system Z CMa at lambda = 2.2 mu m. Both binary components are polarized. The polarization of the infrared primary (P_L=4.2 % +/- 2.0 %, chi =173degr +/- 34degr ) is near to that of the total system and is likely connected to the `outflow configuration'. The secondary shows an unexpected large polarization degree (P_L=8.1 % +/- 4.5 %) at the position angle (chi =102degr +/- 45degr ) different to that of the primary. This high polarization can be explained by a circumstellar accretion disk seen more pole-on than edge-on. The results are discussed with respect to the formation mechanisms of young binary stars.

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