高能X射线探测器(HEX-P):利用超亮X射线源研究极端吸积
高能天体物理现象
2023-11-13 v2 天体物理仪器与方法
摘要
超亮X射线源(ULXs)代表了一类极端的吸积致密天体:从将部分吸积体证认为中子星,到探测到以0.1–0.2 c运动的强风,越来越多的证据表明ULXs容纳着经历高度超爱丁顿吸积的恒星级致密天体。测量它们的内禀性质,如致密天体上的吸积率、外流率、吸积体/伴星质量——进而其前身、寿命与未来演化——具有挑战性,因为ULXs大多位于河外且处于拥挤天区。然而ULXs是我们理解超爱丁顿吸积物理以及通过双星演化通向最终双致密天体双星与引力波源路径的最佳机会。通过端到端与单源模拟的结合,我们研究了HEX-P在其宿主星系背景下研究ULXs的能力,并与当前能力最相近的仪器XMM-Newton和NuSTAR进行比较。HEX-P更高的灵敏度源于其窄点扩散函数与低本底,使其比XMM-Newton和NuSTAR更能探测ULXs的脉冲与宽谱特征。我们描述了HEX-P通过宽带灵敏度、时间分辨与角分辨的结合在理解ULXs及其关键物理方面的价值,这使其任务成为脉冲探测与低本底宽带光谱研究的理想之选。
引用
@article{arxiv.2311.04733,
title = {The High Energy X-ray Probe (HEX-P): Studying Extreme Accretion with Ultraluminous X-ray Sources},
author = {Matteo Bachetti and Matthew J. Middleton and Ciro Pinto and Andrés Gúrpide and Dominic J. Walton and Murray Brightman and Bret Lehmer and Timothy P. Roberts and Georgios Vasilopoulos and Jason Alford and Roberta Amato and Elena Ambrosi and Lixin Dai and Hannah P. Earnshaw and Hamza El Byad and Javier A. García and Gian Luca Israel and Amruta Jaodand and Kristin Madsen and Chandreyee Maitra and Shifra Mandel and Kaya Mori and Fabio Pintore and Ken Ohsuga and Maura Pilia and Daniel Stern and George Younes and Anna Wolter},
journal= {arXiv preprint arXiv:2311.04733},
year = {2023}
}
备注
24 pages, 9 figures. Accepted for publication in Frontiers of Astronomy and Space Science. Minor corrections included