Sample of Cataclysmic Variables from 400d X-ray Survey
Abstract
We present a sample of eight cataclysmic variables (CVs) identified among the X-ray sources of the 400 square degree (400d) X-ray ROSAT/PSPC survey. Based on this sample, we have obtained preliminary constraints on the X-ray luminosity function of CVs in the solar neighbourhood in the range of low luminosities, L_X=~1e29-1e30 erg/s (0.5-2 keV). We show that the logarithmic slope of the CV luminosity function in this luminosity range is less steep than that at L_X>1e31 erg/s. Our results show that of order of thousand CVs will be detected in the SRG/eROSITA all-sky survey at high Galactic latitudes, which will allow to obtain much more accurate measurements of their X-ray luminosity function.
Cite
@article{arxiv.1612.08407,
title = {Sample of Cataclysmic Variables from 400d X-ray Survey},
author = {R. Burenin and M. Revnivtsev and A. Tkachenko and V. Vorobyev and A. Semena and A. Meshcheryakov and S. Dodonov and M. Eselevich and M. Pavlinsky},
journal= {arXiv preprint arXiv:1612.08407},
year = {2017}
}
Comments
To appear in the Proceedings of "Stars: from collapse to collapse", October 2016, Nizhnij Arkhyz, Russia