LMC 1995 , the third supersoft X - ray nova
نویسنده
چکیده
Nova LMC 1995 was detected with ROSAT as an X-ray source in repeated observations between 1995 and 1998, starting five months after the outburst. In February 1998, 3 years after the nova outburst, ROSAT PSPC data show that this is the only LMC post-nova – and one out of three among '100 altogether – that appeared as a bright supersoft X-ray source after the outburst. The PSPC data are satisfactorily fitted with an LTE carbon-oxygen atmosphere model for a 1.2 M white dwarf, resulting in an effective temperature about 30 eV. The X-ray flux increased in the last years and at present Nova LMC 1995 is about twice as bright as in a 1996 observation. We suggest that the photosphere is still shrinking and the remnant becoming hotter. Such a nova is a likely type Ia SN progenitor.
منابع مشابه
A Xmm-newton Observation of Nova Lmc 1995, a Bright Supersoft X-ray Source
Nova LMC 1995, previously detected during 1995-1998 with ROSAT, was observed again as a luminous supersoft X-ray source with XMM–Newton in December of 2000. This nova offers the possibility to observe the spectrum of a hot white dwarf, burning hydrogen in a shell and not obscured by a wind or by nebular emission like in other supersoft X-ray sources. Notwithstanding uncertainties in the calibra...
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