2006-2010年活动阶段期间共生原型Z和中圆盘结构和喷流的形成
Formation of a disk-structure and jets in the symbiotic prototype Z And during its 2006-2010 active phase
摘要：
我们提出了一个分析的最新周期的共生二进制Z和活动的分光光度观测从2006年到2010年。我们估计Z和的热分量的温度为\approx 150000 - 170000 K在最小亮度，降低到\approx 90000 K在亮度最大。我们估计，在中性氦谱线形成区，气态星云的电子密度为N_{e} =10^{10}-10 12} cm^{-3}，在[OIII]和[NeIII]星云谱线形成区，电子密度为10 ^6 - 10 ^7 cm^{-3}。从氦线得到的气体密度增加和从[OIII]和[NeIII]线得到的气体密度同时减少的趋势与系统的亮度增加被观察到。我们的估计表明，在[OIII]和[NeIII]线的理论和观测到的流量的比率同意最好的O/Ne比是类似于其值的行星状星云。模型的光谱能量分布表明，除了一个冷的成分和气态星云，一个相对较冷的伪光球（5250-11 500 K）存在于系统中。同时存在的一个相对较冷的假光球和高电离谱线可能是有关的假光球的盘状结构。在Z和Z的亮度增加的一段时间里，假光球形成得非常迅速，持续了几个星期。我们推断，在2009年，在2006年，该系统的活动是伴随着准直双极喷射的物质。与2006年的情况相反，这些喷流甚至在系统达到最大亮度之前就被探测到了。此外，速度接近1200 km/s的分量在最大值处消失，而速度接近1800 km/s的分量出现。
英文摘要：
We present an analysis of spectrophotometric observations of the latest cycle of activity of the symbiotic binary Z And from 2006 to 2010. We estimate the temperature of the hot component of Z And to be \approx 150000 - 170000 K at minimum brightness, decreasing to \approx 90000 K at the brightness maximum. Our estimate of the electron density in the gaseous nebula is N_{e}=10^{10}-10^{12} cm^{-3} in the region of formation of lines of neutral helium and 10^6-10^7 cm^{-3} in the region of formation of the [OIII] and [NeIII] nebular lines. A trend for the gas density derived from helium lines to increase and the gas density derived from [OIII] and [NeIII] lines to simultaneously decrease with increasing brightness of the system was observed. Our estimates show that the ratios of the theoretical and observed fluxes in the [OIII] and [NeIII] lines agree best when the O/Ne ratio is similar to its value for planetary nebulae. The model spectral energy distribution showed that, in addition to a cool component and gaseous nebula, a relatively cool pseudophotosphere (5250-11 500 K) is present in the system. The simultaneous presence of a relatively cool pseudophotosphere and high-ionization spectral lines is probably related to a disk-like structure of the pseudophotosphere. The pseudophotosphere formed very rapidly, over several weeks, during a period of increasing brightness of Z And. We infer that in 2009, as in 2006, the activity of the system was accompanied by a collimated bipolar ejection of matter. In contrast to the situation in 2006, the jets were detected even before the system reached its maximum brightness. Moreover, components with velocities close to 1200 km/s disappeared at the maximum, while those with velocities close to 1800 km/s appeared.
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