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arXiv 2502.09705astro-ph.GA
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利用 JWST 与 Chandra 在 X 射线波段追踪高红移星系

Tracing High-z Galaxies in X-rays with JWST and Chandra

A. Kaminsky, N. Cappelluti, G. Hasinger, A. Peca, C. M. Casey, N. E. Drakos, A. Faisst, G. Gozaliasl, O. Ilbert, J. S. Kartaltepe, A. Kashlinsky, A. M. Koekemoe… 展开作者

A. Kaminsky, N. Cappelluti, G. Hasinger, A. Peca, C. M. Casey, N. E. Drakos, A. Faisst, G. Gozaliasl, O. Ilbert, J. S. Kartaltepe, A. Kashlinsky, A. M. Koekemoer, H. J. McCracken, J. Rhodes, B. E. Robertson, M. Shuntov, J. Sterling

AI总结:

本文利用 JWST 的 COSMOS-Web 数据与 Chandra 的软 X 射线背景进行交叉相关,在高低红移区间均探测到显著的 CIB-CXB 相干性,并约束了 CXB 流量与偏置,表明约 94% 的软 CXB 已被分辨。

摘要:

我们利用来自 COSMOS-Web Survey 的 JWST 数据,为现已分辨的宇宙红外背景(CIB)的自功率谱及其与 Chandra 在 z > 6 处观测到的未分辨软宇宙 X 射线背景(CXB)的相干性提供更新测量。我们构建了 F277W 和 F444W NIRCam 滤光片下、源暗于 AB mag = 25 的 CIB 图,并将其与 [0.5-2] keV 波段的 CXB 进行交叉相关。我们发现,在 1 到 1000 角秒的尺度上,两个 NIRCam 滤光片中的 CIB-CXB 交叉功率在统计上显著,信噪比(S/N)分别为 4.80 和 6.20,红移范围为 0 < z < 13。在我们的高红移(6 < z < 13)区间中,我们在两个滤光片中都发现了相干性,信噪比分别为 7.32 和 5.39。这些结果表明,存在被 JWST 分辨的 X 射线发射星系,包括恒星形成星系(SFGs)和活动星系核(AGNs)。我们拟合了产生 CIB 的红外源的大尺度偏置随红移 z 的变化,结果与先前测量一致,并对低红移和高红移下的 CXB 流量和偏置施加了约束。本研究中给出的 CXB 流量测量表明,约 94% 的 [0.5-2] keV CXB 已被分辨,该值在 2σ 范围内与 [0.5-2] keV CXB 被完全分辨一致。

英文摘要:

We leverage JWST data from the COSMOS-Web Survey in order to provide updated measurements on the auto-power spectrum of the now resolved Cosmic Infrared Background (CIB) and its coherence with the unresolved soft Cosmic X-ray Background (CXB) observed by Chandra at z > 6. Maps of the CIB in the F277W and F444W NIRCam filters are constructed with sources fainter than AB mag = 25 and cross-correlated with the CXB in the [0.5-2] keV band. We find that on scales between 1 and 1000'' the CIB-CXB cross-power in both NIRCam filters is statistically significant with signal-to-noise ratios (S/N) of 4.80 and 6.20 respectively from redshifts 0 < z < 13. In our high-z (6 < z < 13) interval we find coherence in both filters with a S/N of 7.32 and 5.39 respectively. These results suggest that there are X-ray emitting galaxies resolved by JWST, including star-forming galaxies (SFGs) and active galactic nuclei (AGNs). We fit the large-scale biasing of the IR sources producing the CIB as a function of z with results consistent with prior measurements and place constraints on the CXB flux and biasing at low- and high-z. The CXB flux measurements presented in this study suggest that approximately 94% of the [0.5-2] keV CXB is resolved, and this value is consistent within 2$σ$ with the complete resolution of the [0.5-2] keV CXB.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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