KT Mon has been considered as a classical nova in 1942 based on its light curve and spectroscopy. However, we noticed a unusual feature for a nova soon after its maximum: the early presence of high excitation emission lines such as He II and N III. We propose previously overlooked interpretations that KT Mon can be either a WZ Sge-type dwarf nova and an X-ray transient, although the possibility of an unusual or a recurrent nova is not completely excluded. If KT Mon is a WZ Sge-type dwarf nova, the system is expected to have a brown dwarf secondary. If KT Mon is an X-ray transient, the system is a good candidate for the nearest black-hole binary. Within our knowledge, the observed features seem to more strongly support the latter possibility. In all possibilities, we can expect a recurrent outburst in meaningfully near future.
Cite
@article{arxiv.astro-ph/0210363,
title = {Is KT Mon a Classical Nova?},
author = {T. Kato and H. Yamaoka},
journal= {arXiv preprint arXiv:astro-ph/0210363},
year = {2008}
}
Comments
4 pages, accepted for publication in Astron. Astrophys