Abstract
Multiyear high precision measurements of the longitudinal component of the magnetic field (Be) of four supergiants are reported: βAqr (G0 Ib), αAqr (G2 Ib), ɛGem (G8 Ib), and ɛPeg (K2 Ib). The best measurement accuracy, σ=0.8 G, was achieved for ɛPeg. A Monte Carlo method was used to test the reliability of the derived measurement errors. The differences between the observational errors and the calculated Monte Carlo errors were ∼3.2%. For βAqr and αAqr no statistically significant value of the magnetic field was recorded when averaged over a night. For eGem the following overnight average values of the magnetic field were recorded on five nights: 11.1±2.7 G, 9.8±2.5 G, −10.5±3.0 G, 38.1±7.4 G, and 5.3±1.5 G. For ɛPeg the magnetic field recorded over two nights was −5.3±0.9 G and − 2.7±0.8 G.
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Translated from Astrofizika, Vol. 48, No. 1, pp. 15–28 (February 2005).
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Plachinda, S.I. Magnetic field measurements on four yellow supergiants. I. Astrophysics 48, 9–19 (2005). https://doi.org/10.1007/s10511-005-0002-y
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DOI: https://doi.org/10.1007/s10511-005-0002-y