激变变星QU海隆模型的合成谱约束
Synthetic Spectrum Constraints on a Model of the Cataclysmic Variable QU Carinae
摘要：
在900 ~ 3000 nm范围内，标准模型和截断标准模型的标准模型都不能以可接受的精度拟合QU Carinae的光谱。非标准模型SED对观测集拟合较好.非标准吸积盘模型有一个从白矮星到$R=1.36R_{\rm wd}$的热区，一个狭窄的中温环带，和一个到潮汐截止边界的等温余区。模型包括介于$1.0{\times}10^{-7}M_{\odot} {\rm yr}^{-1}$和$1.0{\times}10^{-6}M_{\odot} {\rm yr}^{-1}$之间的$\dot{M}$值范围以及介于$0.6M_{\odot}$和$1.2M_{\odot}$之间的$M_{\rm wd}$限值。用$M_{\rm wd}=1.2M_{\odot}$得到的解与经验的质量-周期关系是一致的。这组模型在14，000 K和18，000 K之间的可能等温区域$T_{\rm eff}$值的有限范围内达成一致。模型间残差非常相似，因此无法选择最佳模型。依巴谷距离610 pc代表模型结果。轨道倾角介于$40\arcdeg$和$60\arcdeg$之间。
英文摘要：
Neither standard model SEDs nor truncated standard model SEDs fit observed spectra of QU Carinae with acceptable accuracy over the range 900Åto 3000Å. Non-standard model SEDs fit the observation set accurately. The non-standard accretion disk models have a hot region extending from the white dwarf to $R=1.36R_{\rm wd}$,a narrow intermediate temperature annulus, and an isothermal remainder to the tidal cutoff boundary. The models include a range of $\dot{M}$ values between $1.0{\times}10^{-7}M_{\odot} {\rm yr}^{-1}$ and $1.0{\times}10^{-6}M_{\odot} {\rm yr}^{-1}$ and limiting values of $M_{\rm wd}$ between $0.6M_{\odot}$ and $1.2M_{\odot}$. A solution with $M_{\rm wd}=1.2M_{\odot}$ is consistent with an empirical mass-period relation. The set of models agree on a limited range of possible isothermal region $T_{\rm eff}$ values between 14,000K and 18,000K. The model-to-model residuals are so similar that it is not possible to choose a best model. The Hipparcos distance, 610 pc, is representative of the model results. The orbital inclination is between $40\arcdeg$ and $60\arcdeg$.
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