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Astron. Astrophys. 361, 139-152 (2000)


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Spectropolarimetric orbits of symbiotic stars: five S-type systems

T.J. Harries and I.D. Howarth

Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK

Received 28 April 2000 / Accepted 23 June 2000

Abstract

We present multi-epoch, high signal-to-noise spectropolarimetry of the Raman-scattered emission lines of five S-type symbiotic binaries: CD[FORMULA], Hen 1242, M1-21, SY Mus, and V455 Sco. The Raman-line polarizations and magnitudes are used to estimate orbital parameters for these systems. Two of the five systems (CD[FORMULA] and SY Mus) have published radial-velocity orbits, which agree with the spectropolarimetric solutions. The physical parameters of the programme stars are consistent with the period-spectral-type relation of Mürset & Schmid (1999).

Key words: stars: binaries: symbiotic – stars: mass-loss – stars: circumstellar matter – polarization – scattering

Send offprint requests to: T.J. Harries (th@star.ucl.ac.uk)

© European Southern Observatory (ESO) 2000

Online publication: September 5, 2000

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