Back to Volume
Paper: A white dwarf with a low magnetic field in the IP RX J0028.8+5917/V709 Cas
Volume: 261, The Physics of Cataclysmic Variables and Related Objects
Page: 133
Authors: Bonnet-Bidaud, J. M.; Mouchet, M.; de Martino, D.; Matt, G.; Motch, C.
Abstract: We report the first detailed spectroscopic observations of the recently identified intermediate polar RX J0028.8+5917/V709 Cas. We discovered that the system shows significant EW ~(2-4)Å broad absorptions affecting the Balmer lines from Hδ to Hβ. These broad absorptions are interpreted as the contribution of an underlying DA log g=8 white dwarf at a temperature of ~23,000K, contributing ~17% (at 4500Å) to the overall flux. This is the first direct detection of a white dwarf in an intermediate polar system. The absence of significant Zeeman splitting indicates a magnetic field lower than 10 MG, confirming that, at least in some cases, intermediate polars have weaker fields than polars.
Back to Volume