Determining the Hubble constant without the sound horizon scale: measurements from CMB lensing
Determining the Hubble constant without the sound horizon scale: measurements from CMB lensing
复制标题
在没有声视界标度的情况下确定哈勃常数:CMB 透镜测量
DOI:
10.1093/mnras/staa3706
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发表时间:
2021
影响因子:
4.8
通讯作者:
Baxter E
中科院分区:
文献类型:
--
作者:
Baxter E
Measurements of the Hubble constant,H0, from the cosmic distance ladder are currently in tension with the value inferred fromPlanckobservations of the cosmic microwave background (CMB) and other high-redshift data sets if a flat Λ cold dark matter (ΛCDM) cosmological model is assumed. One of the few promising theoretical resolutions of this tension is to invoke new physics that changes the sound horizon scale in the early Universe; this can bring CMB and baryon acoustic oscillations (BAO) constraints onH0into better agreement with local measurements. In this paper, we discuss how a measurement of the Hubble constant can be made from the CMBwithoutusing information from the sound horizon scale,rs. In particular, we show how measurements of the CMB lensing power spectrum can place interesting constraints onH0when combined with measurements of either supernovae or galaxy weak lensing, which constrain the matter density parameter. The constraints arise from the sensitivity of the CMB lensing power spectrum to the horizon scale at matter–radiation equality (in projection); this scale could have a different dependence on new physics than the sound horizon. From an analysis of current CMB lensing data fromPlanckand Pantheon supernovae with conservative external priors, we derive anrs-independent constraint of. Forecasts for future CMB surveys indicate that improving constraints beyond an error ofwill be difficult with CMB lensing, although applying similar methods to the galaxy power spectrum may allow for further improvements.
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DOI:
10.1088/1475-7516/2020/05/005
发表时间:
2020-05-01
影响因子:
6.4
作者:
d'Amico, Guido;Gleyzes, Jerome;Gil-Marin, Hector
通讯作者:
Gil-Marin, Hector
影响因子:
4.8
作者:
Z. Pan;L. Knox;M. White
通讯作者:
M. White
影响因子:
4.8
作者:
Abbott, T. M. C.;Abdalla, F. B.;Zuntz, J.
通讯作者:
Zuntz, J.
DOI:
--
发表时间:
2022
期刊:
影响因子:
--
作者:
Sugimoto Norihiko;Fujisawa Yukiko;Shirasaka Mimo;Abe Mirai;Murakami Shin-ya;Kouyama Toru;Ando Hiroki;Takagi Masahiro;Yamamoto Masaru;Kenneth Wong
通讯作者:
Kenneth Wong