The old nova V728 Sco has been recently recovered via photometric and spectroscopic observations, 150 years after the nova eruption. The spectral properties pointed to a high-inclination system with a comparatively low mass-transfer rate. In this paper we show that the object is an eclipsing system with an orbital period of 3.32 h. It has enhanced long-term variability that can be interpreted as 'stunted' dwarf-nova-type outbursts. Using the ingress and egress times of the eclipsed components we calculate the radius of the central object. The latter turns out to be significantly larger than a white dwarf and we identify it with a hot inner disc. The implications for models on the behaviour of post-novae are discussed.
@article{arxiv.1302.5570,
title = {Life after eruption - II. The eclipsing old nova V728 Scorpii},
author = {C. Tappert and N. Vogt and L. Schmidtobreick and A. Ederoclite and J. Vanderbeke},
journal= {arXiv preprint arXiv:1302.5570},
year = {2015}
}
Comments
10 pages, 7 figures, some in low resolution, to appear in MNRAS