Is KT Mon a Classical Nova?

Details Is KT Mon a Classical Nova? Is KT Mon a Classical Nova?

2002-10-16

arxiv.org/abs/astro-ph/0210363v1

Astron.Astrophys.396:629-632,2002

Astronomy and Astrophysics

Astrophysics

4 pages, accepted for publication in Astron. Astrophys

Scientific paper

10.1051/0004-6361:20021519

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.

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