暗能量巡天中快速演化暂现源的主星系
星系天体物理
2020-10-07 v1
摘要
快速演化暂现源（RETs），亦称快蓝光学暂现源（FBOTs），是一类独特的天体物理事件。其特征为光变曲线比常见超新星（SNe）类衰减快得多，峰值光度跨度极大，且可被观测到大于1的红移。其快速时标演化阻碍了高质量后随观测，因而其起源与爆发/辐射机制仍待解释。本文中我们定义了迄今最大的RET样本，包含来自暗能量巡天的106个对象，并开展了最为全面的RET主星系分析。利用OzDES光谱的深堆叠测光与发射线，我们推导出49个主星系的恒星质量与恒星形成率（SFRs），以及37个的金属丰度。我们发现RET仅在恒星形成星系中爆发，因此可能与大质量恒星相关。将RET主星系与其他爆发暂现源及场星系的主星系样本比较，我们发现RET偏好具有高比恒星形成率的星系，表明其与年轻恒星星族的联系，类似于剥离包层超新星。RET主星系似乎缺乏化学增丰，其金属丰度类似于长伽马射线暴与超亮超新星主星系。主星系性质与暂现源自身峰值星等或衰减率之间无明确关系。
引用
@article{arxiv.2005.08653,
title = {The Host Galaxies of Rapidly Evolving Transients in the Dark Energy Survey},
author = {P. Wiseman and M. Pursiainen and M. Childress and E. Swann and M. Smith and L. Galbany and C. Lidman and T. M. Davis and C. P. Gutiérrez and A. Möller and B. P. Thomas and C. Frohmaier and R. J. Foley and S. R. Hinton and L. Kelsey and R. Kessler and G. F. Lewis and M. Sako and D. Scolnic and M. Sullivan and M. Vincenzi and T. M. C. Abbott and M. Aguena and S. Allam and J. Annis and E. Bertin and S. Bhargava and D. Brooks and D. L. Burke and A. Carnero Rosell and D. Carollo and M. Carrasco Kind and J. Carretero and M. Costanzi and L. N. da Costa and H. T. Diehl and P. Doel and S. Everett and P. Fosalba and J. Frieman and J. García-Bellido and E. Gaztanaga and K. Glazebrook and D. Gruen and R. A. Gruendl and J. Gschwend and G. Gutierrez and D. L. Hollowood and K. Honscheid and D. J. James and K. Kuehn and N. Kuropatkin and M. Lima and M. A. G. Maia and J. L. Marshall and P. Martini and F. Menanteau and R. Miquel and A. Palmese and F. Paz-Chinchón and A. A. Plazas and A. K. Romer and E. Sanchez and V. Scarpine and M. Schubnell and S. Serrano and I. Sevilla-Noarbe and N. E. Sommer and E. Suchyta and M. E. C. Swanson and G. Tarle and B. E. Tucker and D. L. Tucker and T. N. Varga and A. R. Walker},
journal= {arXiv preprint arXiv:2005.08653},
year = {2020}
}
备注
16 pages, 15 figures, submitted to MNRAS