Probing the accretion processes in soft X-ray selected polars
Abstract
High-energy data of accreting white dwarfs give access to the regime of the primary accretion-induced energy release and the different proposed accretion scenarios. We perform XMM-Newton observations of polars selected due to their ROSAT hardness ratios close to -1.0 and model the emission processes in accretion column and accretion region. Our models consider the multi-temperature structure of the emission regions and are mainly determined by mass-flow density, magnetic field strength, and white-dwarf mass. To describe the full spectral energy distribution from infrared to X-rays in a physically consistent way, we include the stellar contributions and establish composite models, which will also be of relevance for future X-ray missions. We confirm the X-ray soft nature of three polars.
Cite
@article{arxiv.1407.0322,
title = {Probing the accretion processes in soft X-ray selected polars},
author = {I. Traulsen and K. Reinsch and A. D. Schwope},
journal= {arXiv preprint arXiv:1407.0322},
year = {2014}
}
Comments
Accepted for publication in Acta Polytechnica, Proceedings of "The Golden Age of Cataclysmic Variables and Related Objects II"