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- W2020542955 abstract "Polarization is a powerful tool for understanding stellar atmospheres and circumstellar environments. Mira and semi-regular variable stars have been observed for decades and some are known to be polarimetrically variable, however, the semi-regular variable V Canes Venatici displays an unusually large, unexplained amount of polarization. We present ten years of optical polarization observations obtained with the HPOL instrument, supplemented by published observations spanning a total interval of about forty years for V CVn. We find that V CVn shows large polarization variations ranging from 1–6%. We also find that for the past forty years the position angle measured for V CVn has been virtually constant suggesting a long-term, stable, asymmetric structure about the star. We suggest that this asymmetry is caused by the presence of a stellar wind bow shock and tail, consistent with the star’s large space velocity." @default.
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- W2020542955 date "2014-08-01" @default.
- W2020542955 modified "2023-10-03" @default.
- W2020542955 title "Evidence of a Mira-like tail and bow shock about the semi-regular variable V CVn from four decades of polarization measurements" @default.
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- W2020542955 doi "https://doi.org/10.1051/0004-6361/201424037" @default.
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