论文标题
紫外线的识别和光谱形成在IA型超新星2011fe中的Max-Light附近
Ultraviolet Line Identifications and Spectral Formation Near Max-Light in Type Ia Supernovae 2011fe
论文作者
论文摘要
我们使用Synow和$ \ texttt {phoenix} $生成的合成光谱对SN 2011F的近乎最大HST观察结果进行了紫外线识别。我们发现，频谱是由铁组元素Fe，Co和Ni的混合物所支配的（由于紫外线中这些元素的覆盖为重线而预期），并且首次在超新星谱中从C IV和Si IV中识别线条。我们还发现，IA型超新星的经典延迟爆炸模型能够准确地重现紫外线中SN 2011FE的通量水平。进一步的分析表明，光离子边缘在远处的特征形成中起重要作用，并且射流的外层温度变化显着改变了Fe III/Fe II比，在中UV特征中产生了远处和速度变化的较大通量变化。 SN 2011Fe是最佳观察到的核心正态sne ia，因此其对紫外光谱的分析显示了紫外光谱在区分不同金属性和IA型超新星的祖细胞场景方面的力量，因为紫外线探测了IA型超级诺夫型的最外层的紫外线，这是对金属型和金属型和前代型和前代型的最敏感的。
We present ultraviolet line identifications of near maximum-light HST observations of SN 2011fe using synthetic spectra generated from both SYNOW and $\texttt{PHOENIX}$. We find the spectrum to be dominated by blends of iron group elements Fe, Co, and Ni (as expected due to heavy line blanketing by these elements in the UV) and for the first time identify lines from C IV and Si IV in a supernova spectrum. We also find that classical delayed detonation models of Type Ia supernovae are able to accurately reproduce the flux levels of SN 2011fe in the UV. Further analysis reveals that photionization edges play an important role in feature formation in the far-UV, and that temperature variations in the outer layers of the ejecta significantly alter the Fe III/Fe II ratio producing large flux changes in the far-UV and velocity shifts in mid-UV features. SN 2011fe is the best observed core-normal SNe Ia, therefore analysis its of UV spectra shows the power of UV spectra in discriminating between different metalicities and progenitor scenarios of Type Ia supernovae, due to the fact that the UV probes the outermost layers of the Type Ia supernova, which are most sensitive to metalicity and progenitor variations.
