异常型Ia型超新星SN 2005hk：是否存在某些Ia型超新星以爆发方式爆发？
天体物理学
2008-11-26 v2
摘要
我们对SN 2005hk进行了广泛的u'g'r'i'BVRIYJHKs光度测量和光谱观测。这些数据揭示，SN 2005hk在观察属性上几乎与被称为"已知最异常的Ia型超新星"的SN 2002cx几乎相同。两种超新星均展现出类似于SN 1991T的高电离 pre-maximum 光谱，却具有类似于SN 1991bg的低峰值亮度。光谱显示，SN 2005hk和SN 2002cx的膨胀速度约为典型Ia型超新星的一半。两种超新星的R和I光度曲线也呈现异常，未显示出正常Ia型超新星所常见的二次峰。我们的YJH光度测量揭示了SN 2005hk在近红外波段的相同异常。通过将我们的光学和近红外光度测量与使用Swift卫星获得的已发布紫外光度曲线相结合，我们能够构建从B峰值前约10天到B峰值后约60天的全辐射光度曲线。该光度曲线的形状和异常低的峰值亮度，加上低的膨胀速度以及在红色和近红外波段未显示二次峰，均与产生约0.25个太阳质量56Ni的3D爆发模型计算结果在合理范围内吻合。
引用
@article{arxiv.astro-ph/0611295,
title = {The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations?},
author = {M. M. Phillips and W. Li and J. A. Frieman and S. I. Blinnikov and D. DePoy and J. L. Prieto and P. Milne and C. Contreras and G. Folatelli and N. Morrell and M. Hamuy and N. B. Suntzeff and M. Roth and S. Gonzalez and W. Krzeminski and A. V. Filippenko and W. L. Freedman and R. Chornock and S. Jha and B. F. Madore and S. E. Persson and C. R. Burns and P. Wyatt and D. Murphy and R. J. Foley and M. Ganeshalingam and F. J. D. Serduke and K. Krisciunas and B. Bassett and A. Becker and B. Dilday and J. Eastman and P. M. Garnavich and J. Holtzman and R. Kessler and H. Lampeitl and J. Marriner and S. Frank and J. L. Marshall and G. Miknaitis and M. Sako and D. P. Schneider and K. van der Heyden and Naoki Yasuda},
journal= {arXiv preprint arXiv:astro-ph/0611295},
year = {2008}
}
备注
Accepted by PASP, to appear in April 2007 issue, 63 pages, 16 figures, 11 tables