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arXiv 2406.05049astro-ph.CO
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暗能量巡天超新星项目:利用逆距离阶梯对哈勃常数的最新测量

The Dark Energy Survey Supernova Program: An updated measurement of the Hubble constant using the Inverse Distance Ladder

R. Camilleri, T. M. Davis, S. R. Hinton, P. Armstrong, D. Brout, L. Galbany, K. Glazebrook, J. Lee, C. Lidman, R. C. Nichol, M. Sako, D. Scolnic, P. Shah, M. Sm… 展开作者

R. Camilleri, T. M. Davis, S. R. Hinton, P. Armstrong, D. Brout, L. Galbany, K. Glazebrook, J. Lee, C. Lidman, R. C. Nichol, M. Sako, D. Scolnic, P. Shah, M. Smith, M. Sullivan, B. O. Sánchez, M. Vincenzi, P. Wiseman, S. Allam, T. M. C. Abbott, M. Aguena, F. Andrade-Oliveira, J. Asorey, S. Avila, D. Bacon, K. Bechtol, S. Bocquet, D. Brooks, E. Buckley-Geer, D. L. Burke, A. Carnero Rosell, D. Carollo, J. Carretero, F. J. Castander, C. Conselice, L. N. da Costa, M. E. S. Pereira, S. Desai, H. T. Diehl, S. Everett, I. Ferrero, B. Flaugher, J. Frieman, J. García-Bellido, E. Gaztanaga, G. Giannini, R. A. Gruendl, K. Herner, D. L. Hollowood, K. Honscheid, D. Huterer, D. J. James, S. Kent, K. Kuehn, O. Lahav, S. Lee, G. F. Lewis, M. Lima, J. L. Marshall, J. Mena-Fernández, R. Miquel, J. Myles, R. L. C. Ogando, A. Palmese, A. Pieres, A. A. Plazas Malagón, A. K. Romer, A. Roodman, S. Samuroff, E. Sanchez, D. Sanchez Cid, M. Schubnell, I. Sevilla-Noarbe, E. Suchyta, N. Suntzeff, M. E. C. Swanson, G. Tarle, B. E. Tucker, A. R. Walker, N. Weaverdyck

AI总结:

本文利用暗能量巡天超新星与 DESI 重子声学振荡数据,通过逆距离阶梯和四阶宇宙图模型测得哈勃常数 $H_0=67.19^{+0.66}_{-0.64}$ km/s/Mpc,与 Planck 结果一致但膨胀历史存在差异。

摘要:

我们通过将超新星的绝对星等校准到由重子声学振荡测得的距离,来测量宇宙当前的膨胀速率,即哈勃常数 $H_0$。这种“逆距离阶梯”技术为使用邻近绝对距离测量校准超新星提供了一种替代方案,将校准替换为高红移锚点。我们使用暗能量巡天最新发布的 1829 颗超新星,其红移范围覆盖 $0.01\lt z \lt1.13$,并锚定到 DESI 最新的重子声学振荡测量,其有效红移范围覆盖 $0.30 \lt z_{\mathrm{eff}} \lt 2.33$。为了将宇宙学追踪到 $z=0$,我们使用三阶、四阶和五阶宇宙图模型,这些模型在设计上对宇宙的能量成分和膨胀历史不作预设。在加入更高红移的 DESI-BAO 数据后,三阶模型对两个数据集的拟合效果较差,而根据赤池信息准则,四阶模型更受青睐。利用四阶宇宙图模型,我们得到 $H_0=67.19^{+0.66}_{-0.64}\mathrm{~km} \mathrm{~s}^{-1} \mathrm{~Mpc}^{-1}$,与 Planck 给出的数值一致,且无需假设 Flat-$Λ$CDM。然而,最佳拟合的膨胀历史与 Planck 的结果不同,这为继续研究这些张力提供了持续的动力。

英文摘要:

We measure the current expansion rate of the Universe, Hubble's constant $H_0$, by calibrating the absolute magnitudes of supernovae to distances measured by Baryon Acoustic Oscillations. This `inverse distance ladder' technique provides an alternative to calibrating supernovae using nearby absolute distance measurements, replacing the calibration with a high-redshift anchor. We use the recent release of 1829 supernovae from the Dark Energy Survey spanning $0.01\lt z \lt1.13$ anchored to the recent Baryon Acoustic Oscillation measurements from DESI spanning $0.30 \lt z_{\mathrm{eff}} \lt 2.33$. To trace cosmology to $z=0$, we use the third-, fourth- and fifth-order cosmographic models, which, by design, are agnostic about the energy content and expansion history of the universe. With the inclusion of the higher-redshift DESI-BAO data, the third-order model is a poor fit to both data sets, with the fourth-order model being preferred by the Akaike Information Criterion. Using the fourth-order cosmographic model, we find $H_0=67.19^{+0.66}_{-0.64}\mathrm{~km} \mathrm{~s}^{-1} \mathrm{~Mpc}^{-1}$, in agreement with the value found by Planck without the need to assume Flat-$Λ$CDM. However the best-fitting expansion history differs from that of Planck, providing continued motivation to investigate these tensions.

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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