LiteBIRD 科学目标与预测：探测宇宙热气的分布
宇宙学与河外天体物理
2024-10-24 v2
摘要
我们评估了 LiteBIRD 任务通过热 Sunyaev-Zeldovich (SZ) 效应绘制宇宙热气分布的能力。我们的分析依赖于综合性的模拟，包括各种银河系和外银河系前景辐射，同时考虑 LiteBIRD 的特定仪器特征，如探测器灵敏度、频率相关的束斜面卷积、非均匀的天扫描以及 噪声。我们实施了量身定制的分量分离（component-separation）管道，用于绘制覆盖 98% 天空的热 SZ 克朗尔 参数。尽管在星系团科学中分辨率较低，LiteBIRD 提供了全天覆盖率，并且相较于普惠星座（Planck）卫星，在灵敏度和频率带数方面具有优势，从而可构建包含更少前景污染的全天 图。通过将 LiteBIRD 与普惠星座信道在分量分离管道中结合，我们获得了最优 图，既利用了普惠星座信道的高分辨率优势，实现了超出 LiteBIRD 束限的紧凑星系团恢复，也利用了大量灵敏的 LiteBIRD 信道进一步抑制了前景污染。通过检查各类天成分的图、功率谱和一维统计，我们突显了 LiteBIRD 的价值。在分量分离之后，LiteBIRD 的 噪声在所有多极矩中均被有效压制在热 SZ 信号之下。从 LiteBIRD-Planck 组合 图功率谱获得的 宇宙约束，其不确定性比仅使用普惠星座的数据小 15%。这一改进可归因于 LiteBIRD-Planck 组合 图中更大比例的无污染天空。
引用
@article{arxiv.2407.17555,
title = {LiteBIRD Science Goals and Forecasts. Mapping the Hot Gas in the Universe},
author = {M. Remazeilles and M. Douspis and J. A. Rubiño-Martín and A. J. Banday and J. Chluba and P. de Bernardis and M. De Petris and C. Hernández-Monteagudo and G. Luzzi and J. Macias-Perez and S. Masi and T. Namikawa and L. Salvati and H. Tanimura and K. Aizawa and A. Anand and J. Aumont and C. Baccigalupi and M. Ballardini and R. B. Barreiro and N. Bartolo and S. Basak and M. Bersanelli and D. Blinov and M. Bortolami and T. Brinckmann and E. Calabrese and P. Campeti and E. Carinos and A. Carones and F. J. Casas and K. Cheung and L. Clermont and F. Columbro and A. Coppolecchia and F. Cuttaia and T. de Haan and E. de la Hoz and S. Della Torre and P. Diego-Palazuelos and G. D'Alessandro and H. K. Eriksen and F. Finelli and U. Fuskeland and G. Galloni and M. Galloway and M. Gervasi and R. T. Génova-Santos and T. Ghigna and S. Giardiello and C. Gimeno-Amo and E. Gjerløw and R. González González and A. Gruppuso and M. Hazumi and S. Henrot-Versillé and L. T. Hergt and D. Herranz and K. Kohri and E. Komatsu and L. Lamagna and M. Lattanzi and C. Leloup and F. Levrier and A. I. Lonappan and M. López-Caniego and B. Maffei and E. Martínez-González and S. Matarrese and T. Matsumura and S. Micheli and M. Migliaccio and M. Monelli and L. Montier and G. Morgante and Y. Nagano and R. Nagata and A. Novelli and R. Omae and L. Pagano and D. Paoletti and V. Pavlidou and F. Piacentini and M. Pinchera and G. Polenta and L. Porcelli and A. Ritacco and M. Ruiz-Granda and Y. Sakurai and D. Scott and M. Shiraishi and S. L. Stever and R. M. Sullivan and Y. Takase and K. Tassis and L. Terenzi and M. Tomasi and M. Tristram and L. Vacher and B. van Tent and P. Vielva and I. K. Wehus and B. Westbrook and G. Weymann-Despres and E. J. Wollack and M. Zannoni and Y. Zhou},
journal= {arXiv preprint arXiv:2407.17555},
year = {2024}
}
备注
38 pages, 13 figures, abstract shortened. Updated to match version accepted by JCAP