A. Y. Baluta, M. Pruzhinskaya, P. Rosnet, N. Pauna
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引用次数: 0
摘要
Ia 型超新星（SNe Ia）被用作可靠的宇宙距离指标，要利用哈勃图更精确地测量宇宙的宇宙学参数，就必须对它们进行标准化。然而，哈勃图仍然显示出内在的色散，这可能受到超新星环境的影响。在这项研究中，我们重现了潘神超新星数据的哈勃拟合图，并研究了为在早期型和晚期型星系中爆炸的超新星引入各种标准化方程的可能性。我们分析了潘神宇宙学样本中的330个SNe Ia，研究宿主星系形态如何影响SNe Ia的标准化。我们发现，与晚型星系相比，由早型星系寄存的SNe Ia具有不同的标准化参数。我们的结论是，对宿主星系形态进行校正会极大地影响哈勃图拟合的准确性。
The influence of environmental effects on Type Ia Supernovae Standardization
Type Ia Supernovae (SNe Ia) are used as reliable cosmic distance indicators and their standardization is necessary for a more accurate measurement of the cosmological parameters of the Universe using the Hubble diagram. However, the Hubble diagram still shows intrinsic dispersion, potentially influenced by the supernova’s environment. In this study, we reproduce Hubble fit diagrams for the Pantheon supernovae data, and also investigate the possibility of introducing various standardization equations for supernovae that exploded in early- and late-type galaxies. We analyze 330 SNe Ia from the Pantheon cosmological sample to study how host galaxy morphology affects SN Ia standardization. We find that SNe Ia hosted by early-type galaxies have different standardization parameters compared to those hosted by late-type galaxies. We conclude that correcting for host galaxy morphology significantly impacts the accuracy of the Hubble diagram fit.
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