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THE SOFT X-RAY TURNOFF OF NOVA MUSCAE 1983

机译:1983年新音乐的软X射线关闭

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Nova GQ Muscae 1983 was detected by ROSAT as a luminous "supersoft" X-ray source in 1992, nearly a decade after outburst. Further, this is the only classical postnova known to have maintained constant luminosity on a timescale predicted by theoretical models. Follow-up observations were made with the ROSAT position-sensitive proportional counter in 1993 January and September, and complemented with B-band photometry taken in 1993 January. By 1993 January, the X-ray count rate had declined by a factor of 17, while there was neither an appreciable decrease in the optical magnitude nor a change in the amplitude of modulation. In 1993 September the soft X-ray flux was below the ROSAT threshold limit, implying a decrease of a factor ≥ 30 in the count rate. This decline can be interpreted by the turnoff of nuclear processes due to the complete consumption of the residual hydrogen-rich envelope. However, the optical luminosity of the system is not simply coupled to the X-ray luminosity (e.g., through reprocessing).
机译:爆发后近十年,1992年ROSAT将1983年的Nova GQ Muscae探测为发光的“超软” X射线源。此外,这是唯一已知的在理论模型预测的时间尺度上保持恒定光度的经典后新星。 1993年1月和9月使用ROSAT位置敏感比例计数器进行了后续观察,并于1993年1月进行了B波段测光。到1993年1月,X射线计数率下降了17倍,而光学幅度没有明显下降,调制幅度也没有变化。 1993年9月,软X射线通量低于ROSAT阈值极限,这意味着计数率降低了≥30。这种下降可以解释为由于剩余富氢外壳的完全消耗而关闭了核过程。然而,系统的光度并不简单地耦合到X射线光度(例如,通过后处理)。

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