BICEP/Keck 第十六篇：通过与中性氢的相关性刻画尘埃偏振
星系天体物理
2023-03-14 v2 宇宙学与河外天体物理
摘要
我们通过将 BICEP/Keck 和 Planck 数据与基于中性氢（H I）观测的偏振模板相关联来刻画银河系尘埃纤维状结构。尘埃偏振对于我们理解星际介质（ISM）中的天体物理过程以及在宇宙微波背景（CMB）中搜寻原初引力波都十分重要。在弥漫 ISM 中，H I 与尘埃强相关，并部分组织成与局地磁场对齐的纤维状结构。我们分析了 95、150 和 220 GHz 处的深层 BICEP/Keck 数据，覆盖 BICEP/Keck 对原初引力波设定最佳限制的低柱密度天区。我们将 H I 发射分离为不同的速度分量，并探测到与局地银河系 H I 相关但与麦哲伦流 I 相关 H I 无关的尘埃偏振。我们给出了与纤维状 H I 形态模板相关的偏振尘埃发射在低至 95 GHz 的稳健多频探测。为评估其用于前景清理的效用，我们报告 H I 形态模板在 的多极范围内以约 10–65% 的水平与包含尘埃、CMB 和噪声分量贡献的 BICEP/Keck 图在 B 模中相关。我们测得纤维状尘埃分量能谱分布的光谱指数为 。我们发现该区域中纤维状结构与其余尘埃场之间或来自包含与中等速度 H I 相关尘埃均无去相关证据。最后，我们探索了基于 H I 的纤维状模型中的形态参数空间。
引用
@article{arxiv.2210.05684,
title = {BICEP / Keck XVI: Characterizing Dust Polarization through Correlations with Neutral Hydrogen},
author = {Keck Collaboration and P. A. R. Ade and Z. Ahmed and M. Amiri and D. Barkats and R. Basu Thakur and D. Beck and C. A. Bischoff and J. J. Bock and H. Boenish and E. Bullock and V. Buza and J. R. Cheshire and S. E. Clark and J. Connors and J. Cornelison and M. Crumrine and A. Cukierman and E. V. Denison and M. Dierickx and L. Duband and M. Eiben and S. Fatigoni and J. P. Filippini and S. Fliescher and C. Giannakopoulos and N. Goeckner-Wald and D. C. Goldfinger and J. Grayson and P. Grimes and G. Halal and G. Hall and M. Halpern and E. Hand and S. Harrison and S. Henderson and S. R. Hildebrandt and J. Hubmayr and H. Hui and K. D. Irwin and J. Kang and K. S. Karkare and E. Karpel and S. Kefeli and S. A. Kernasovskiy and J. M. Kovac and C. L. Kuo and K. Lau and E. M. Leitch and A. Lennox and K. G. Megerian and L. Minutolo and L. Moncelsi and Y. Nakato and T. Namikawa and H. T. Nguyen and R. O'Brient and R. W. Ogburn and S. Palladino and M. A. Petroff and T. Prouve and C. Pryke and B. Racine and C. D. Reintsema and S. Richter and A. Schillaci and B. L. Schmitt and R. Schwarz and C. D. Sheehy and B. Singari and A. Soliman and T. St Germaine and B. Steinbach and R. V. Sudiwala and G. P. Teply and K. L. Thompson and J. E. Tolan and C. Tucker and A. D. Turner and C. Umilta and C. Verges and A. G. Vieregg and A. Wandui and A. C. Weber and D. V. Wiebe and J. Willmert and C. L. Wong and W. L. K. Wu and H. Yang and K. W. Yoon and E. Young and C. Yu and L. Zeng and C. Zhang and S. Zhang},
journal= {arXiv preprint arXiv:2210.05684},
year = {2023}
}
备注
27 pages, 12 figures