论文标题
来自二头肌/凯克望远镜的通货膨胀B模型的最新限制
The Latest Constraints on Inflationary B-modes from the BICEP/Keck Telescopes
论文作者
论文摘要
在过去的十年中，二头肌/凯克协作一直在Amundsen-Scott South Pole站经营一系列望远镜，测量了由Primordial Refication Wave（PGWS）的宇宙微波背景（CMB）上印在宇宙微波背景（CMB）上的级别尺度级别的偏光化。这些望远镜是紧凑的折射光计绘制的绘制约2％的天空，在广泛的频率下观察，以说明银河同步子和热灰尘发射的偏振前景。我们的最新出版物“ BK18”利用了到2018年观察季节收集的数据，并与公开可用的WMAP和Planck数据一起限制了张量表与量表的比率$ r $。它特别包括（1）3年的Bicep3数据，该数据是前景最低95 GHz的当前最深的CMB极化图； （2）比普朗克353 GHz地图在尘埃的前景上具有更高信噪比的Keck 220 GHz图。我们将这些地图的自动和跨光谱符合到多组分的可能性模型（$λ$ CDM+dust+dust+synchrotron+noise+$ r $），并发现它是当前噪声水平上数据的足够描述。可能性分析产生$σ（r）= 0.009 $。我们基线模型的$ r $的推断被拧紧至$ r_ {0.05} = 0.014^{+0.010} _ { - 0.011} $和$ r_ {0.05} <0.05} <0.036 $ 95％的信心，这意味着Bicep/Keck $ b $ -ode Data是最强大的现有数据的限制。预计使用最高2027年的数据将达到$σ（r）\ Lessim 0.003 $的上升二头肌阵列望远镜。
For the past decade, the BICEP/Keck collaboration has been operating a series of telescopes at the Amundsen-Scott South Pole Station measuring degree-scale $B$-mode polarization imprinted in the Cosmic Microwave Background (CMB) by primordial gravitational waves (PGWs). These telescopes are compact refracting polarimeters mapping about 2% of the sky, observing at a broad range of frequencies to account for the polarized foreground from Galactic synchrotron and thermal dust emission. Our latest publication "BK18" utilizes the data collected up to the 2018 observing season, in conjunction with the publicly available WMAP and Planck data, to constrain the tensor-to-scalar ratio $r$. It particularly includes (1) the 3-year BICEP3 data which is the current deepest CMB polarization map at the foreground-minimum 95 GHz; and (2) the Keck 220 GHz map with a higher signal-to-noise ratio on the dust foreground than the Planck 353 GHz map. We fit the auto- and cross-spectra of these maps to a multicomponent likelihood model ($Λ$CDM+dust+synchrotron+noise+$r$) and find it to be an adequate description of the data at the current noise level. The likelihood analysis yields $σ(r)=0.009$. The inference of $r$ from our baseline model is tightened to $r_{0.05}=0.014^{+0.010}_{-0.011}$ and $r_{0.05}<0.036$ at 95% confidence, meaning that the BICEP/Keck $B$-mode data is the most powerful existing dataset for the constraint of PGWs. The up-coming BICEP Array telescope is projected to reach $σ(r) \lesssim 0.003$ using data up to 2027.
