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arXiv 1802.04720astro-ph.COgr-qchep-phhep-th
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爱因斯坦望远镜引力波标准塞壬观测对宇宙学中中微子称量的影响

Impacts of gravitational-wave standard siren observation of the Einstein Telescope on weighing neutrinos in cosmology

Ling-Feng Wang, Xuan-Neng Zhang, Jing-Fei Zhang, Xin Zhang

摘要:

研究了爱因斯坦望远镜(ET)的引力波(GW)标准观测对中微子总质量的约束作用。我们模拟了1000 GW的事件,将观察到的ET在其10年的观察,以标准的$Λ$ CDM宇宙学作为基准模型。我们结合模拟的GW数据与其他宇宙学观测,包括宇宙微波背景(CMB),重子声学振荡(BAO),和Ia型超新星(SN)。我们考虑中微子质量的三种质量等级情况,即,正常层次(NH)、倒置层次(IH)和退化层次(DH)。利用Planck+BAO+SN,我们得到NH情况下的$\sum m_ν<0.175$ eV,IH情况下的$\sum m_ν<0.200$ eV和DH情况下的$\sum m_ν<0.136$ eV。在考虑GW数据之后,即,使用Planck+BAO+SN+GW,对于NH情况,约束结果变为$\sum m_ν<0.151$ eV,对于IH情况,约束结果变为$\sum m_ν<0.185$ eV,对于DH情况,约束结果变为$\sum m_ν<0.122$ eV。我们发现,GW数据可以帮助减少$\sum m_ν$的上限分别为13.7%,7.5%和10.3%的NH,IH和DH的情况下,。此外,我们发现GW数据也可以帮助打破$\sum m_ν$和其他参数之间的简并性。我们发现,ET的GW数据可以大大提高宇宙学参数的约束精度。

英文摘要:

We investigate the impacts of the gravitational-wave (GW) standard siren observation of the Einstein Telescope (ET) on constraining the total neutrino mass. We simulate 1000 GW events that would be observed by the ET in its 10-year observation by taking the standard $Λ$CDM cosmology as a fiducial model. We combine the simulated GW data with other cosmological observations including cosmic microwave background (CMB), baryon acoustic oscillations (BAO), and type Ia supernovae (SN). We consider three mass hierarchy cases for the neutrino mass, i.e., normal hierarchy (NH), inverted hierarchy (IH), and degenerate hierarchy (DH). Using Planck+BAO+SN, we obtain $\sum m_ν<0.175$ eV for the NH case, $\sum m_ν<0.200$ eV for the IH case, and $\sum m_ν<0.136$ eV for the DH case. After considering the GW data, i.e., using Planck+BAO+SN+GW, the constraint results become $\sum m_ν<0.151$ eV for the NH case, $\sum m_ν<0.185$ eV for the IH case, and $\sum m_ν<0.122$ eV for the DH case. We find that the GW data can help reduce the upper limits of $\sum m_ν$ by 13.7%, 7.5%, and 10.3% for the NH, IH, and DH cases, respectively. In addition, we find that the GW data can also help break the degeneracies between $\sum m_ν$ and other parameters. We show that the GW data of the ET could greatly improve the constraint accuracies of cosmological parameters.

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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