高能X射线探测器(HEX-P)：聚焦宇宙X射线背景
高能天体物理现象
2023-11-17 v2 星系天体物理
天体物理仪器与方法
摘要
自宇宙X射线背景(CXB)发现以来，天文学家一直致力于理解在其10-40 keV能段峰值处吸积的类星超大质量黑洞(SMBHs)。现有软X射线望远镜仅能将此族群研究至10 keV，而NuSTAR(聚焦3–24 keV)虽取得重大进展，在刻画硬X射线族群方面仍留下显著不确定性，这对校准当前族群合成模型至关重要。本文对高能X射线探测器(HEX-P)的两个河外巡天(深场与宽场)模拟进行深入分析，各观测2 Ms。应用成熟的源探测技术，我们显示HEX-P巡天在10-40 keV能段将达到约10 erg s cm的通量，比当前NuSTAR巡天暗一个数量级。借助大量新探测硬X射线源()，我们展示HEX-P能将40 keV以下超过80%的CXB解析为独立源。HEX-P解析背景测量的预期精度将使我们能区分SMBH增长的族群合成模型。HEX-P利用精确的宽带(0.5-40 keV)光谱分析以及软硬X射线颜色的结合，即便对较暗源也能提供遮挡约束，总体目标是测量Compton厚比例。凭借10–40 keV能段前所未有的灵敏度，HEX-P将探索AGN的硬X射线辐射至前所未有的流量极限，从而拓展偶然发现的参数空间。因此，很可能需新模型来刻画HEX-P将揭示的族群。
引用
@article{arxiv.2311.04832,
title = {The High Energy X-ray Probe (HEX-P): Bringing the Cosmic X-ray Background into Focus},
author = {Francesca Civano and Xiurui Zhao and Peter Boorman and Stefano Marchesi and Tonima Ananna and Samantha Creech and Chien-Ting Chen and Ryan Hickox and Daniel Stern and Kristin Madsen and Javier A. García and Ross Silver and James Aird and David M. Alexander and Mislav Balokovíc and William N. Brandt and Johannes Buchner and Poshak Gandhi and Elias Kammoun and Stephanie LaMassa and Giorgio Lanzuisi and Andrea Merloni and Alberto Moretti and Kirpal Nandra and Emanuele Nardini and Anrealuna Pizzetti and Simonetta Puccetti and Ryan Pfeifle and Claudio Ricci and Daniele Spiga and Nuria Torres-Albá and the HEX-P Collaboration},
journal= {arXiv preprint arXiv:2311.04832},
year = {2023}
}
备注
28 pages, 13 Figures, 2 tables; submitted to Frontiers in Astronomy and Space Sciences; minor edits in the text, abstract and figure labels