论文标题
IA型SN 1972E和SN 1895b的30年无线电观察结果:对壳壳的约束
Thirty Years of Radio Observations of Type Ia SN 1972E and SN 1895B: Constraints on Circumstellar Shells
论文作者
论文摘要
我们已经对35年的档案进行了成像,非常大数组(VLA)对附近的观察结果(D $ _ {\ rm {l}} $ = $ = $ 3.15 mpc)类型IA Supernovae Sn \,1972e and Sn \,1972e and Sn \,1895b,在9至121年后爆发。未检测到无线电排放,限制了SN \,1972e和Sn \,1895b的8.5 GHz发光度为l $ _ {ν,8.5 \ rm {ghz}} $ <$ 6.0 $ 6.0 $ \ times $ 10 $ $ 10 $ 10 $^{23} $^{23} $ erg s $^s $^$^{ - 1} $^{ - 1} $ hz $ hz $ hz $ hz $ hz $ hz $ hz $ hz $ hz $ 1} l $ _ {ν,8.5 \ rm {ghz}} $ $ <$ 8.9 $ \ times $ 10 $^{23} $ erg s $^{ - 1} $ hz $^{ - 1} $ 121 $ 121 $ 121年。这些限制意味着一种干净的室内介质(CSM),$ n $ <$ <$ <$ 0.9 cm $^{ - 3} $向Radii输出几$ \ times $ 10 $^{18} $ cm,如果SN BlastWave正在扩展成均匀的密度材料。由于我们的观察结果的广泛时间覆盖,我们还限制了SN \,1972e祖细胞周围的CSM壳的存在。我们从本质上排除所有中等和厚的贝壳,质量为0.05 $ - $ 0.3 m $ _ \ odot $在radii之间,$ \ sim $ 10 $^{17} $和10 $^{18} $ cm,而在特定的半径上进行的薄壳,质量降低了$ \ $ \ $ \ 0.01 m $ 0.01 m $ $ $ _ \ odot $ \ odot $ \ odot $ \ odot。这些约束规定了一系列单一和双退化的祖细胞场景的参数空间,包括经常性的NOVA,核心脱位对象,超累积爆炸和白人矮人(WD)合并(在Merger和爆炸的开始之间,都有几百年的延迟。允许的祖细胞包括与上一集的普通信封进化的最后一集的明显($> $> $ 10 $^{4} $年)的延迟,并且只要复发时间尺寸I短片,并且该系统已在Nova阶段,并且在Nova阶段是$ \ gtrsim $ \ gtrsim $^$^4} $^$^$^$^$^$^$^$(腔已疏散。未来对其他中级IA类型IA SNE的多上观测将为这些爆炸周围的大规模CSM环境提供全面的看法。
We have imaged over 35 years of archival Very Large Array (VLA) observations of the nearby (d$_{\rm{L}}$ $=$ 3.15 Mpc) Type Ia supernovae SN\,1972E and SN\,1895B between 9 and 121 years post-explosion. No radio emission is detected, constraining the 8.5 GHz luminosities of SN\,1972E and SN\,1895B to be L$_{ν,8.5\rm{GHz}}$ $<$ 6.0 $\times$ 10$^{23}$ erg s$^{-1}$ Hz$^{-1}$ 45 years post-explosion and L$_{ν,8.5\rm{GHz}}$ $<$ 8.9 $\times$ 10$^{23}$ erg s$^{-1}$ Hz$^{-1}$ 121 years post-explosion, respectively. These limits imply a clean circumstellar medium (CSM), with $n$ $<$ 0.9 cm$^{-3}$ out to radii of a few $\times$ 10$^{18}$ cm, if the SN blastwave is expanding into uniform density material. Due to the extensive time coverage of our observations, we also constrain the presence of CSM shells surrounding the progenitor of SN\,1972E. We rule out essentially all medium and thick shells with masses of 0.05$-$0.3 M$_\odot$ at radii between $\sim$10$^{17}$ and 10$^{18}$ cm, and thin shells at specific radii with masses down to $\lesssim$0.01 M$_\odot$. These constraints rule out swaths of parameter space for a range of single and double degenerate progenitor scenarios, including recurrent nova, core-degenerate objects, ultra-prompt explosions and white dwarf (WD) mergers with delays of a few hundred years between the onset of merger and explosion. Allowed progenitors include WD-WD systems with a significant ($>$ 10$^{4}$ years) delay from the last episode of common envelope evolution and single degenerate systems undergoing recurrent nova, provided that the recurrence timescale i short and the system has been in the nova phase for $\gtrsim$10$^{4}$ yr, such that a large ($>$ 10$^{18}$ cm) cavity has been evacuated. Future multi-epoch observations of additional intermediate-aged Type Ia SNe will provide a comprehensive view of the large-scale CSM environments around these explosions.