DES14X3taz：一颗显示出明亮且快速冷却的初始峰值前凸起的I型超亮超新星
太阳与恒星天体物理
2016-02-17 v2 宇宙学与河外天体物理
高能天体物理现象
摘要
我们介绍DES14X3taz，一颗由暗能量巡天(DES)超新星计划发现的新的贫氢超亮超新星(SLSN-I)，并由使用DECam的超亮超新星巡天(SUDSS)提供了额外测光数据。使用加那利大型望远镜(GTC)上的OSIRIS获得的光谱显示DES14X3taz是一颗红移z=0.608的SLSN-I。多色测光揭示了一条双峰光变曲线：一个蓝色且相对明亮的初始峰值，在主光变曲线缓慢上升之前迅速消退。我们的多色测光首次使我们能够表明，该初始峰值在15个静止帧天内从22,000K冷却到8,000K，且比任何已发表的核坍缩超新星都更快更亮，达到主峰值热光度的30%。没有任何物理的镍驱动模型能拟合该初始峰值。我们表明，一个激波冷却模型随后由磁星驱动光变曲线第二阶段，能够充分解释DES14X3taz的整个光变曲线。涉及位于约400太阳半径处的延展星周物质的激波冷却的模型，优于恒星包层激波加热表面层的冷却模型。我们将DES14X3taz与文献中少数双峰SLSN-I事件进行比较。尽管这些初始峰值的上升时间和特征不同，但存在一种诱人的可能性，即它们可以用同一物理解释来阐释。
引用
@article{arxiv.1512.06043,
title = {DES14X3taz: A Type I Superluminous Supernova Showing a Luminous, Rapidly Cooling Initial Pre-Peak Bump},
author = {M. Smith and M. Sullivan and C. B. D'Andrea and F. J. Castander and R. Casas and S. Prajs and A. Papadopoulos and R. C. Nichol and N. V. Karpenka and S. R. Bernard and P. Brown and R. Cartier and J. Cooke and C. Curtin and T. M. Davis and D. A. Finley and R. J. Foley and A. Gal-Yam and D. A. Goldstein and S. González-Gaitán and R. R. Gupta and D. A. Howell and C. Inserra and R. Kessler and C. Lidman and J. Marriner and P. Nugent and T. A. Pritchard and M. Sako and S. Smartt and R. C. Smith and H. Spinka and R. C. Thomas and R. C. Wolf and A. Zenteno and T. M. C. Abbott and A. Benoit-Lévy and E. Bertin and D. Brooks and E. Buckley-Geer and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and M. Crocce and C. E. Cunha and L. N. da Costa and S. Desai and H. T. Diehl and P. Doel and J. Estrada and A. E. Evrard and B. Flaugher and P. Fosalba and J. Frieman and D. W. Gerdes and D. Gruen and R. A. Gruendl and D. J. James and K. Kuehn and N. Kuropatkin and O. Lahav and T. S. Li and J. L. Marshall and P. Martini and C. J. Miller and R. Miquel and B. Nord and R. Ogando and A. A. Plazas and K. Reil and A. K. Romer and A. Roodman and E. S. Rykoff and E. Sanchez and V. Scarpine and M. Schubnell and I. Sevilla-Noarbe and M. Soares-Santos and F. Sobreira and E. Suchyta and M. E. C. Swanson and G. Tarle and A. R. Walker and W. Wester},
journal= {arXiv preprint arXiv:1512.06043},
year = {2016}
}
备注
Accepted for publication in ApJL. 4 figures, 1 table. Minor changes