Circular spectropolarimetry of VV Puppis

Astronomy and Astrophysics – Astronomy

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Binary Stars, Polarimetry, Stellar Spectra, X Ray Stars, Circular Polarization, Cyclotron Radiation, Emission Spectra, Visible Spectrum

Scientific paper

The authors present circular spectropolarimetric observations of VV Puppis obtained when the system was in a high state. Although the intensity spectrum shows no evidence of cyclotron harmonic features, the circular polarization spectrum shows a broad minimum centred at 5040 Å which could be interpreted as cyclotron harmonic number n = 7 in a magnetic field of 3.2×107G. The observations are interpreted in terms of current models of cyclotron emission from an accretion shock.

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