Is KT Mon a Classical Nova?
نویسندگان
چکیده
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 HeII and NIII. 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.
منابع مشابه
The mass of the white dwarf in the old nova BT Mon
We present spectrophotometry of the eclipsing old nova BT Mon (Nova Mon 1939). By detecting weak absorption features from the secondary star, we find its radial velocity semi-amplitude to be KR = 205± 5 km s −1 and its rotational velocity to be v sin i = 138 ± 5 kms. We also measure the radial velocity semi-amplitude of the primary star to be KR = 170±10km s . From these parameters we obtain a ...
متن کاملThe mass of the white dwarf in the old nova BT
We present spectrophotometry of the eclipsing old nova BT Mon (Nova Mon 1939). By detecting weak absorption features from the secondary star, we nd its radial velocity semi-amplitude to be K R = 205 5 km s ?1 and its rotational velocity to be v sin i = 138 5 km s ?1. We also measure the radial velocity semi-amplitude of the primary star to be K R = 170 10km s ?1. From these parameters we obtain...
متن کاملar X iv : a st ro - p h / 05 06 40 3 v 1 1 7 Ju n 20 05 Near - Infrared water lines in V 838 Monocerotis
V838 Monocerotis had an intriguing, nova-like outburst in January 2002 which has subsequently led to several studies of the object. It is now recognized that the outburst of V838 Mon and its evolution are different from that of a classical nova or other classes of well-known eruptive variables. V838 Mon, along with two other objects that have analogous properties, appears to comprise a new clas...
متن کاملNear-infrared Water Lines in V838 Monocerotis
V838 Monocerotis had an intriguing, nova-like outburst in 2002 January that has subsequently led to several studies of the object. It is now recognized that the outburst of V838 Mon and its evolution are different from those of a classical nova or other classes of well-known eruptive variables. V838 Mon, along with two other objects that have analogous properties, appears to make up a new class...
متن کاملV 838 Monocerotis — a Newly Discovered , Very Peculiar , Slow Nova - Like Object
The eruptive variable V838 Mon was discovered on Jan 6, 2002. Due to a subsequent phase of almost constant brightness and a spectral appearance which is unlike classical novae, speculations have been made about its nature. Either it was a very peculiar, slow nova defining a new class, an eruptive event in an evolved star as in the case of Sakurai's Object but in a much earlier phase, or somethi...
متن کامل