利用校正后的Pantheon+和暗能量调查（DES）-DOVEKIE Ia型超新星更新哈勃常数的1.1%精度值
Updated 1.1% Precision Values of the Hubble Constant with Corrected Pantheon+ and Dark Energy Survey (DES)-DOVEKIE Type Ia Supernovae
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中文总结 AI 辅助
该研究利用校正后的Pantheon+和DES-DOVEKIE超新星更新哈勃常数测量值，通过对宿主质量校正等方法，得出不同情况下的哈勃常数及张力，虽有更新但未解决哈勃张力问题。
中文摘要 AI 辅助
我们利用校正后的Pantheon+和DES-DOVEKIE超新星更新哈勃常数测量值。这是DES-DOVEKIE首次应用于距离阶梯法的哈勃常数测定。近期对超新星数据集的重新分析使Pantheon+、DES-DOVEKIE和Union3.1样本在动态暗能量证据方面处于同等地位。更新哈勃常数是下一步合理举措。H0DN基线为73.499±0.809 km s⁻¹ Mpc⁻¹，与Λ冷暗物质（ΛCDM）宇宙学中宇宙微波背景（CMB）测定值有7.1σ的张力。对旧的Pantheon+应用修正后的宿主质量校正改变了1701个视星等行中的114个。仅应用这些星等校正，在H0DN协方差、红移和速度不变的情况下，得到H0 = 73.264±0.806 km s⁻¹ Mpc⁻¹和6.85σ的哈勃张力。这是主要基线结果。对于DES-DOVEKIE，220颗超新星在哈勃图红移中跨度为0.025≤zHD≤0.151，其中196颗与校正后的Pantheon+重叠。固定偏移量得到H0 = 73.267±0.828 km s⁻¹ Mpc⁻¹和6.70σ的张力。扩展到zHD≃0.3会使H0升高，但两者升高幅度均小于H0DN不确定性。两次更新都未解决哈勃张力问题。
英文摘要
We update the Hubble constant measurement with corrected Pantheon+ and DES-DOVEKIE supernovae. The use of DES-DOVEKIE here is the first application of DES-DOVEKIE to a distance-ladder $H_0$ determination. Recent reanalyses of supernova datasets have put Pantheon+, DES-DOVEKIE, and Union3.1 samples on the same footing with regard to the evidence of dynamical dark energy ($3.2$--$3.4σ$), and thus an update on the Hubble constant is the next logical step. The $H_0$ Distance Network (H0DN) baseline is $73.499\pm0.809$ km s$^{-1}$ Mpc$^{-1}$, a $7.1σ$ tension with the cosmic microwave background (CMB) determination in a $Λ$ cold-dark-matter ($Λ$CDM) cosmology, $H_0^{\rm CMB,ΛCDM}=67.24\pm0.35$ km s$^{-1}$ Mpc$^{-1}$. A revised host-mass correction applied to the older Pantheon+ changes 114 of the total 1701 apparent-magnitude rows. The calibrator supernovae are not affected, but 52 of the 277 Hubble-flow rows are. Applying only these magnitude corrections, with the H0DN covariance, redshifts, and velocities unchanged, gives $H_0=73.264\pm0.806$ km s$^{-1}$ Mpc$^{-1}$ and a $6.85σ$ Hubble tension. This is our main baseline result and the update for the astrophysics community. Alternatively, replacing the complete Hubble-flow treatment with the corrected Pantheon+ data gives $73.139\pm0.791$ km s$^{-1}$ Mpc$^{-1}$ and $6.82σ$. For DES-DOVEKIE, 220 supernovae span $0.025\le z_{\rm HD}\le0.151$ in Hubble-diagram redshift, and 196 of them overlap with corrected Pantheon+. These overlaps determine the offset used to place the public DES-DOVEKIE distance moduli on the H0DN apparent-magnitude scale. Holding this offset fixed gives $H_0=73.267\pm0.828$ km s$^{-1}$ Mpc$^{-1}$ and a $6.70σ$ tension. Extending to $z_{\rm HD}\simeq0.3$ raises $H_0$. However, both rises are smaller than the H0DN uncertainty. Neither update resolves the Hubble tension. (abridged)
发表机构
- Institute of Astronomy and Astrophysics, Academia Sinica（中央研究院天文及天文物理研究所）
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