首页> 外文期刊>The Astrophysical journal >THE EXTENDED HUBBLE SPACE TELESCOPE SUPERNOVA SURVEY: THE RATE OF CORE COLLAPSE SUPERNOVAE TO z ~ 1
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THE EXTENDED HUBBLE SPACE TELESCOPE SUPERNOVA SURVEY: THE RATE OF CORE COLLAPSE SUPERNOVAE TO z ~ 1

机译:扩展的望远镜空间望远镜超新星调查:核塌陷超新星到z〜1的比率

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摘要

We use a sample of 45 core collapse supernovae detected with the Advanced Camera for Surveys on board the Hubble Space Telescope to derive the core collapse supernova rate in the redshift range 0.1 z 1.3. In redshift bins centered on z = 0.39, z = 0.73, and z = 1.11, we find rates of 3.00+1.28 – 0.94 +1.04 – 0.57, 7.39+1.86 – 1.52 +3.20 – 1.60, and 9.57+3.76 – 2.80 +4.96 – 2.80, respectively, given in units of yr–1 Mpc–3 10–4 h 3 70. The rates have been corrected for host galaxy extinction, including supernovae missed in highly dust-enshrouded environments in infrared bright galaxies. The first errors are statistical while the second ones are the estimated systematic errors. We perform a detailed discussion of possible sources of systematic errors and note that these start to dominate over statistical errors at z 0.5, emphasizing the need to better control the systematic effects. For example, a better understanding of the amount of dust extinction in the host galaxies and knowledge of the supernova luminosity function, in particular the fraction of faint M –15 supernovae, is needed to better constrain the rates. When comparing our results with the core collapse supernova rate based on the star formation rate, we find a good agreement, consistent with the supernova rate following the star formation rate, as expected.
机译:我们使用哈勃太空望远镜上的“高级勘测照相机”检测到的45个核坍塌超新星的样本,得出在红移范围0.1 0.5时,这些误差开始逐渐超过统计误差,强调需要更好地控制系统误差。例如,需要更好地了解宿主星系中的消光量并了解超新星的光度函数,特别是微弱的M-15超新星的分数,以更好地限制速率。当将我们的结果与基于恒星形成速率的核心坍缩超新星速率进行比较时,我们发现,与预期的恒星形成速率之后的超新星速率相符,一致性很好。

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