PEARLS：JWST北黄极时域场的NuSTAR和XMM-Newton河外巡天IV：X射线变异性分析
PEARLS: NuSTAR and XMM-Newton Extragalactic Survey of the JWST North Ecliptic Pole Time-Domain Field IV: X-Ray Variability Analysis
- NASA Goddard Space Flight Center（NASA戈达德太空飞行中心）
- Southeastern Universities Research Association（东南大学研究协会）
- School of Physics and Astronomy, University of Minnesota（明尼苏达大学物理与天文学学院）
- Department of Astronomy, University of Illinois at Urbana-Champaign（伊利诺伊大学厄巴纳-香槟分校天文学系）
- Cahill Center for Astrophysics, California Institute of Technology（加州理工学院凯斯天体物理学中心）
- Department of Physics & Astronomy, University of Utah（犹他大学物理与天文学系）
- Center for Astrophysics | Harvard & Smithsonian（哈佛史密森尼天体物理中心）
- Steward Observatory, University of Arizona（亚利桑那大学斯图尔德天文台）
- School of Earth and Space Exploration, Arizona State University（亚利桑那州立大学地球与空间探索学院）
- Department of Physics and Astronomy, University of Missouri（密苏里大学物理与天文学系）
机构由 AI 辅助整理，请以论文原文为准。
中文总结 AI 辅助
基于NuSTAR和XMM-Newton近五年对JWST北黄极时域场的观测数据，分析X射线源变异性，发现高光度源更易变，且变幅随观测时标增大。
中文摘要 AI 辅助
自2019年起，NuSTAR和XMM-Newton对詹姆斯·韦布空间望远镜（JWST）北黄极（NEP）时域场（TDF）进行了近五年的连续观测。在此期间，NEP X射线巡天分别积累了3.5 Ms和228 ks的准同时NuSTAR和XMM-Newton观测数据。本文基于X射线测光数据，报告了该场中探测到的112个NuSTAR源和453个XMM-Newton源的变异性结果。4个NuSTAR源和11个XMM-Newton源在至少一个波段以≥99%的置信度发生变化。具有红移测量的源显示出光度与变异性之间的关系，74%的变源亮度超过巡天灵敏度极限的5倍。这得到了约1/3计数超过400的源被探测为变源的支持，而仅有4个计数较少的源表现出变异性。变异性时标尚未精确确定，但变异性振幅在较长时标上趋于更大。
英文摘要
NuSTAR and XMM-Newton have observed the James Webb Space Telescope (JWST) North Ecliptic Pole (NEP) Time-Domain Field (TDF) for almost five contiguous years starting in 2019. In that time, the NEP X-ray survey has accumulated 3.5 Ms and 228 ks of quasi-simultaneous NuSTAR and XMM-Newton observations, respectively. This paper presents variability results for the 112 NuSTAR and 453 XMM-Newton sources detected in this field, based solely on the X-ray photometric data. Four NuSTAR sources and 11 XMM-Newton sources varied in at least one band at >=99% confidence. The sources with redshift measurements show a relationship between luminosity and variability with 74% of variable sources brighter than 5x the sensitivity limit of the survey. This is supported by about 1/3 of sources with more than 400 counts detected being variable and only 4 sources with fewer counts showing variability. Variability timescales are not well determined, but variability amplitude tends to be larger on longer timescales.
