物理学科Seminar第740讲 早期暗能量模型与宇宙学问题

创建时间:  2025/05/30  邵奋芬   浏览次数:   返回

报告题目 (Title):Early Dark Energy Models and Cosmological Tensions(早期暗能量模型与宇宙学问题)

报告人 (Speaker):Prof. Bum-Hoon Lee(韩国西江大学)

报告时间 (Time):2025年6月13日(周五)15:30-17:00

报告地点 (Place):校本部 G313

邀请人 (Inviter):尹璐

主办部门:理学院物理系

摘要 (Abstract):

Observational data, such as the Hubble constant (H0) and cosmic birefringence, challenge the ΛCDM model. The Hubble tension indicates differing expansion rates between CMB measurements and direct observation of supernova/Cepheid variable. Cosmic birefringence causes rotation in the CMB polarization plane. We reanalyze known results that the Ultralight Axion-like Early Dark Energy (EDE) model with n=3 alleviates Hubble tension but does not fit CMB EB mode observations satisfactorily. We emphasize our notice that the CMB EB angular power spectrum's shape is sensitive to cosmological parameters. In conclusion, we suggest the EDE model with n=3 aligns well with both cosmic birefringence and Hubble tension.

上一条:数学学科Seminar第2851讲 裂隙介质核素迁移分数阶导数升尺度建模及应用

下一条:量子科技研究院Seminar第61讲暨物理学科Seminar第739讲 3D Dirac半金属Cd3As2及其Zn掺杂的合金中非平衡态超快动力学的太赫兹光谱研究


物理学科Seminar第740讲 早期暗能量模型与宇宙学问题

创建时间:  2025/05/30  邵奋芬   浏览次数:   返回

报告题目 (Title):Early Dark Energy Models and Cosmological Tensions(早期暗能量模型与宇宙学问题)

报告人 (Speaker):Prof. Bum-Hoon Lee(韩国西江大学)

报告时间 (Time):2025年6月13日(周五)15:30-17:00

报告地点 (Place):校本部 G313

邀请人 (Inviter):尹璐

主办部门:理学院物理系

摘要 (Abstract):

Observational data, such as the Hubble constant (H0) and cosmic birefringence, challenge the ΛCDM model. The Hubble tension indicates differing expansion rates between CMB measurements and direct observation of supernova/Cepheid variable. Cosmic birefringence causes rotation in the CMB polarization plane. We reanalyze known results that the Ultralight Axion-like Early Dark Energy (EDE) model with n=3 alleviates Hubble tension but does not fit CMB EB mode observations satisfactorily. We emphasize our notice that the CMB EB angular power spectrum's shape is sensitive to cosmological parameters. In conclusion, we suggest the EDE model with n=3 aligns well with both cosmic birefringence and Hubble tension.

上一条:数学学科Seminar第2851讲 裂隙介质核素迁移分数阶导数升尺度建模及应用

下一条:量子科技研究院Seminar第61讲暨物理学科Seminar第739讲 3D Dirac半金属Cd3As2及其Zn掺杂的合金中非平衡态超快动力学的太赫兹光谱研究