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arXiv 0705.4401astro-ph
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伽马射线暴是标准烛光吗?

Are Gamma-Ray Bursts Standard Candles?

Li-Xin Li

摘要:

通过将48个长持续时间伽马射线暴(GRB)样本按红移由低到高分为4组,用Amati关系log Eiso = a + b log Epeak对各组进行拟合,发现参数a和b随各组GRB平均红移的变化是系统而显著的。结果表明,伽玛暴强烈的宇宙红移的演变,因此不是标准的蜡烛。

英文摘要:

By dividing a sample of 48 long-duration gamma-ray bursts (GRBs) into four groups with redshift from low to high and fitting each group with the Amati relation log Eiso = a + b log Epeak, I find that parameters a and b vary with the mean redshift of the GRBs in each group systematically and significantly. The results suggest that GRBs evolve strongly with the cosmic redshift and hence are not standard candles.

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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