Abstract
We calculated the flux and polarization of cyclotron radiation from the possibly existing corona of the cool isolated magnetic white dwarf G 99-47. Comparison of the computed and observed color indices J — L and J — L’ yields the new upper limits 106 K and 1010 cm-3 for the coronal temperature and density. These values are, respectively, 10 and 40 times less than the corresponding upper limits derived from the earlier ROSAT observations.
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Zheleznyakov, V.V., Koryagin, S.A., Serber, A.V. (2003). Constraints on the Parameters of a Magnetic White Dwarf Corona Imposed by its Cyclotron Emission. In: de Martino, D., Silvotti, R., Solheim, JE., Kalytis, R. (eds) White Dwarfs. NATO Science Series, vol 105. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0215-8_57
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DOI: https://doi.org/10.1007/978-94-010-0215-8_57
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