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arXiv 0803.3793astro-ph
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从SN速率演化测量得到的超新星祖先和铁密度演化

Supernova progenitors and iron density evolution from SN rate evolution measurements

Guillaume Blanc, Laura Greggio

摘要:

使用广泛的汇编的文献超新星速率数据,我们研究在何种程度上限制其演化的恒星形成的历史,Ia型超新星(SNIa)的祖先的寿命分布,核心坍缩超新星(CCSN)的祖先的质量范围,和铁密度的演变在该领域。我们发现,宇宙SNIa率对它们的祖先模型的诊断能力相对较弱。更有希望的是利用SNIa速率在星系团中的演化。我们发现CCSN速率与Salpeter IMF兼容,其祖先的最小质量> 10 Msun。我们估计了SNe释放的铁密度场的演化,发现在局部宇宙中铁的丰度应该是~ 0.1太阳。我们讨论了这个值和团簇中铁丰度之间的差异。

英文摘要:

Using an extensive compilation of literature supernova rate data we study to which extent its evolution constrains the star formation history, the distribution of the type Ia supernova (SNIa) progenitor's lifetime, the mass range of core-collapse supernova (CCSN) progenitors, and the evolution of the iron density in the field. We find that the diagnostic power of the cosmic SNIa rate on their progenitor model is relatively weak. More promising is the use of the evolution of the SNIa rate in galaxy clusters. We find that the CCSN rate is compatible with a Salpeter IMF, with a minimum mass for their progenitors > 10 Msun. We estimate the evolution in the field of the iron density released by SNe and find that in the local universe the iron abundance should be ~ 0.1 solar. We discuss the difference between this value and the iron abundance in clusters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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