暗能量巡天中的快速演化暂现源
高能天体物理现象
2018-09-05 v2
摘要
我们给出了在暗能量巡天超新星计划中搜寻快速演化暂现源的结果。这些事件的特征为快速的光变曲线演化（在 天内上升至峰值，峰值后 天内指数衰减）。我们发现了 72 个事件，其中包括 37 个具有来自宿主星系光谱特征的光谱红移的暂现源。这 37 个事件使快速光学暂现源的总数增加了一倍以上。它们被发现于广泛的红移范围（）和峰值亮度（）。多波段测光在峰值后数周内可由黑体很好地拟合。这些事件在峰值处显得炽热（ K）且庞大（ cm），并通常随时间膨胀和冷却，尽管部分事件显示出温度大致恒定的后退光球层证据。在峰值附近拍摄的光谱由与炽热、光学厚抛射物一致的蓝色无特征连续谱主导。我们将我们的事件与先前提出的涉及环绕核心坍缩超新星（CCSNe）的光学厚风中的激波突破的物理情景进行比较，得出结论认为该情景的当前模型可能需要一个额外的能量源来描述指数衰减。我们发现这些暂现源倾向于偏好恒星形成宿主星系，这可能与核心坍缩起源一致。然而，需对光变曲线进行更细致的建模以确定其物理起源。
引用
@article{arxiv.1803.04869,
title = {Rapidly evolving transients in the Dark Energy Survey},
author = {M. Pursiainen and M. Childress and M. Smith and S. Prajs and M. Sullivan and T. M. Davis and R. J. Foley and J. Asorey and J. Calcino and D. Carollo and C. Curtin and C. B. D'Andrea and K. Glazebrook and C. Gutierrez and S. R. Hinton and J. K. Hoormann and C. Inserra and R. Kessler and A. King and K. Kuehn and G. F. Lewis and C. Lidman and E. Macaulay and A. Möller and R. C. Nichol and M. Sako and N. E. Sommer and E. Swann and B. E. Tucker and S. A. Uddin and P. Wiseman and B. Zhang and T. M. C. Abbott and F. B. Abdalla and S. Allam and J. Annis and S. Avila and D. Brooks and E. Buckley-Geer and D. L. Burke and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. J. Castander and C. E. Cunha and C. Davis and J. De Vicente and H. T. Diehl and P. Doel and T. F. Eifler and B. Flaugher and P. Fosalba and J. Frieman and J. García-Bellido and D. Gruen and R. A. Gruendl and G. Gutierrez and W. G. Hartley and D. L. Hollowood and K. Honscheid and D. J. James and T. Jeltema and N. Kuropatkin and T. S. Li and M. Lima and M. A. G. Maia and P. Martini and F. Menanteau and R. L. C. Ogando and A. A. Plazas and A. Roodman and E. Sanchez and V. Scarpine and R. Schindler and R. C. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and M. E. C. Swanson and G. Tarle and D. L. Tucker and A. R. Walker},
journal= {arXiv preprint arXiv:1803.04869},
year = {2018}
}
备注
Accepted to MNRAS on 22.8.2018