Spectrophotometric templates for core-collapse supernovae and their application in simulations of time-domain surveys
Spectrophotometric templates for core-collapse supernovae and their application in simulations of time-domain surveys
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DOI：
10.1093/mnras/stz2448
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发表时间：
2019-08
影响因子：
4.8
通讯作者：
M. Vincenzi;M. Sullivan;R. Firth;C. Guti'errez;C. Frohmaier;M. Smith;C. Angus;R. Nichol
中科院分区：
文献类型：
--
作者：
M. Vincenzi;M. Sullivan;R. Firth;C. Guti'errez;C. Frohmaier;M. Smith;C. Angus;R. Nichol
时域巡天的设计和分析需要能够准确模拟真实的核心塌缩超新星 (SN) 事件群体。我们提出了一组为此目的而设计的光谱时间序列模板，适用于富氢（II 型、IIn 和 IIb 型）和剥离包络（Ib、Ic 和 Ic-BL 型）核心塌陷超新星。我们使用文献中 67 个核心塌陷超新星的光度和光谱数据，并为每个数据生成一个时间序列光谱模板。用于构建模板的技术完全由数据驱动，不假设光变曲线的任何参数形式或模型。模板构建代码是开源的，可以应用于任何可以进行良好采样的多波段光度测量和多个光谱观测的瞬态。我们使用观察者框架紫外光度测定将这些光谱模板扩展到近紫外至 λ ≃ 1600 Å。我们还提供了一组针对宿主星系尘埃消光进行校正的模板，并提供了一组可在模拟中与我们的光谱模板一起使用的光度函数。我们举例说明了如何使用这些模板，将它们集成到流行的超新星模拟包 snana 中，并在光度选择的宇宙学 Ia 型超新星样本中模拟核心塌缩超新星，这些样本容易受到核心塌缩事件的污染。
The design and analysis of time-domain sky surveys require the ability to simulate accurately realistic populations of core-collapse supernova (SN) events. We present a set of spectral time-series templates designed for this purpose, for both hydrogen-rich (Type II, IIn, and IIb) and stripped-envelope (Type Ib, Ic, and Ic-BL) core-collapse SNe. We use photometric and spectroscopic data for 67 core-collapse SNe from the literature, and for each generate a time-series spectral template. The techniques used to build the templates are fully data driven with no assumption of any parametric form or model for the light curves. The template-building code is open source, and can be applied to any transient for which well-sampled multiband photometry and multiple spectroscopic observations are available. We extend these spectral templates into the near-ultraviolet to λ ≃ 1600 Å using observer-frame ultraviolet photometry. We also provide a set of templates corrected for host galaxy dust extinction, and provide a set of luminosity functions that can be used with our spectral templates in simulations. We give an example of how these templates can be used by integrating them within the popular SN simulation package snana, and simulating core-collapse SNe in photometrically selected cosmological Type Ia SN samples, prone to contamination from core-collapse events.