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arXiv 1503.00074astro-ph.SR
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蛇夫座RS复发新星(2006年爆发)的简要分析

Abundance analysis of the recurrent nova RS Ophiuchi (2006 outburst)

Ramkrishna Das, Anindita Mondal

摘要:

我们提出了一个分析的元素丰度的喷出物的经常性新星RS Oph使用公布的光学和近红外光谱在2006年爆发。我们使用云光电离程序通过改变几个参数来产生合成光谱,然后将模型产生的光谱与在两个时期获得的观测发射线光谱进行匹配。我们通过$χ^{2}$最小化技术获得最佳拟合模型参数。我们的模型结果与观测到的光学和近红外光谱吻合得很好。最佳拟合的模型参数是兼容的热白矮星源的T $_{BB}$为5.5 - 5.8 $\times$ 10 $^{5}$ K和大致恒定的亮度为6 - 8 $\times$ 10 $^{36}$尔格s $^{-1}$。通过分析,我们发现以下丰度(按数量)与太阳有关的元素:He/H = 1.8 $\pm$ 0.1,N/H = 12.0 $\pm$ 1.0,O/H = 1.0 $\pm$ 0.4,Ne/H = 1.5 $\pm$ 0.1,Si/H = 0.4 $\pm$ 0.1,Fe/H = 3.2 $\pm$ 0.2,Ar/H = 5.1 $\pm$ 0.1,和Al/H = 1.0 $\pm$ 0.1,所有其他元素被设定为太阳丰度。这表明,相对于太阳,氦,氮,氖,铁和氩的喷出物显着增强。利用得到的参数值,我们估计出一个喷射的质量在3.4 - 4.9 $\times$ 10 $^{-6}$ M $_{\odot}$,这是与观测结果相一致的范围。

英文摘要:

We present an analysis of elemental abundances of ejecta of the recurrent nova RS Oph using published optical and near-infrared spectra during the 2006 outburst. We use the CLOUDY photoionization code to generate synthetic spectra by varying several parameters, the model generated spectra are then matched with the observed emission line spectra obtained at two epochs. We obtain the best fit model parameters through the $χ^{2}$ minimization technique. Our model results fit well with observed optical and near-infrared spectra. The best-fit model parameters are compatible with a hot white dwarf source with T$_{BB}$ of 5.5 - 5.8 $\times$ 10$^{5}$ K and roughly constant a luminosity of 6 - 8 $\times$ 10$^{36}$ ergs s$^{-1}$. From the analysis we find the following abundances (by number) of elements with respect to solar: He/H = 1.8 $\pm$ 0.1, N/H = 12.0 $\pm$ 1.0, O/H = 1.0 $\pm$ 0.4, Ne/H = 1.5 $\pm$ 0.1, Si/H = 0.4 $\pm$ 0.1, Fe/H = 3.2 $\pm$ 0.2, Ar/H = 5.1 $\pm$ 0.1, and Al/H = 1.0 $\pm$ 0.1, all other elements were set at the solar abundance. This shows the ejecta are significantly enhanced, relative to solar, in helium, nitrogen, neon, iron and argon. Using the obtained parameter values, we estimate an ejected mass in the range of 3.4 - 4.9 $\times$ 10$^{-6}$ M$_{\odot}$ which is consistent with observational results.

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