BINGO项目IV：任务性能评估和初步部件分离步骤的模拟
The BINGO Project IV: Simulations for mission performance assessment and preliminary component separation steps
摘要：
中性氢（HI）在宇宙中的大尺度分布通过其21厘米的发射而发光。中性气体综合观测（BINGO）射电望远镜的重子声学振荡的目标是通过21 cm强度测绘（IM）探测射频上的重子声学振荡（BAO）。该望远镜的红移范围为0.127 $< z <$ 0.449，瞬时视场为$14.75^{\circ} \times 6.0^{\circ}$。在这项工作中，我们调查不同的建设性和操作场景的仪器生成的天空地图，因为它们将由仪器。为此，我们使用一组端到端IM任务模拟。这些图还将用于评估组分分离方法（GNILC）的效率。我们模拟了在单碟IM实验（如BINGO）中产生的数据类型。根据计算结果，对望远镜的焦平面进行了优化设计。此外，GNILC方法在模拟数据上的应用表明，它是可行的，以提取宇宙信号跨越广泛的多极和红移。结果与标准主成分分析方法具有可比性。
英文摘要：
The large-scale distribution of neutral hydrogen (HI) in the Universe is luminous through its 21 cm emission. The goal of the Baryon Acoustic Oscillations from Integrated Neutral Gas Observations -- BINGO -- radio telescope is to detect baryon acoustic oscillations (BAOs) at radio frequencies through 21 cm intensity mapping (IM). The telescope will span the redshift range 0.127 $< z <$ 0.449 with an instantaneous field-of-view of $14.75^{\circ} \times 6.0^{\circ}$. In this work we investigate different constructive and operational scenarios of the instrument by generating sky maps as they would be produced by the instrument. In doing this we use a set of end-to-end IM mission simulations. The maps will additionally be used to evaluate the efficiency of a component separation method (GNILC). We have simulated the kind of data that would be produced in a single-dish IM experiment such as BINGO. According to the results obtained, we have optimized the focal plane design of the telescope. In addition, the application of the GNILC method on simulated data shows that it is feasible to extract the cosmological signal across a wide range of multipoles and redshifts. The results are comparable with the standard principal component analysis method.
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