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Astron. Astrophys. 336, 604-612 (1998)

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Polarimetric observations of southern hemisphere young solar-type stars

D. Clarke 1, R.A. Smith 1 and R.V. Yudin 2

1 University Observatory, Acre Road, Glasgow, Scotland, UK
2 Central Astronomical Observatory of Russian Academy of Sciences at Pulkovo, 196140 St. Petersburg, Russia

Received 13 March 1998 / Accepted 15 May 1998

Abstract

A report is given on some linear and circular polarimetric observations of young solar-type stars. Despite a somewhat high level of instrumental polarization, the measurements were able to detect polarizations [FORMULA] or 0.01%. Temporal variability has been discovered for 59 Vir with an indication that circular polarization is also present. A polarization at a level of [FORMULA] was found associated with the star SAO 251015. Marginal polarizations are also suspected for the stars HD 155555 and HD 1835. For SAO 154972 (TU Pyx), a sudden change in polarization [FORMULA] occurred over some tens of minutes and an associated circular polarization was also detected.

Key words: polarization – stars: 59 Vir; HD 155555; HD 1835; SAO 251015; Tu Pyx

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© European Southern Observatory (ESO) 1998

Online publication: July 20, 1998
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