晚时动力学暗能量与CMB-距离梯张力
Late Time Dynamical Dark Energy and the CMB-Distance Ladder Tension
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中文总结 AI 辅助
该研究探讨CMB-距离梯张力问题，指出Ia型超新星M^B转换为H_0的不确定性不影响该张力，DESI关于暗能量状态方程晚时演化的初步结论也未改变此结果。
中文摘要 AI 辅助
传统距离梯测量Ia型超新星（SNIa）的标准化峰值绝对星等M^B。根据SH0ES合作组，距离梯给出的M^B值与假设LCDM宇宙学从宇宙微波背景（CMB）推断出的数值存在高度差异，这种CMB-距离梯张力对宇宙实际晚时膨胀历史不敏感。从M^B推导哈勃常数H_0需要宇宙学模型，而SNIa的星等-红移关系能对膨胀历史提供严格约束，因此M^B转换为H_0的不确定性对CMB-距离梯张力无显著影响。暗能量光谱仪（DESI）合作组关于暗能量状态方程晚时演化的初步主张，并未改变这一结论。
英文摘要
The traditional distance ladder measures the standardized peak absolute magnitude M^B of Type Ia supernovae (SNIa). According to the SH0ES collaboration, the distance ladder value of M^B is highly discrepant with the value inferred from the cosmic microwave background (CMB) assuming the LCDM cosmology. This CMB-distance ladder tension is insensitive to the actual late time expansion history of the Universe. To derive a value of the Hubble constant H_0, from M^B requires a cosmological model. However, the magnitude-redshift relation of SNIa provides tight constrains the expansion history. As a consequence, uncertainties in the conversion of M^B into H_0 have no significant impact on the CMB-distance ladder tension. The tentative claim by the Dark Energy Spectroscopic Instrument collaboration for late time evolution of the dark energy equation of state does not alter this conclusion.
