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arXiv 2602.11269astro-ph.GAastro-ph.CO
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类星体近邻效应作为类星体对距离的另一种探测手段

The Quasar Proximity Effect as an Alternative Probe of Quasar Pair Distances

University of Alberta（阿尔伯塔大学）；University of Michigan（密歇根大学）

Huanqing Chen, Camille Avestruz, Jakob Wiest

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8 pages, 4 figures, comments welcome
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AI总结：

本文探讨了利用合成类星体近邻区光谱作为约束类星体对视线距离的方法，展示了该方法在不同距离范围内的有效性，为研究高红移类星体生长机制提供了新途径。

摘要：

最近发现的高红移（z≈5）类星体对可能是超大质量黑洞合并的前体，为研究高红移类星体生长机制提供了窗口。然而，其沿视线方向的距离（d_l.o.s.）的不确定性限制了我们对类星体对的表征能力。本文研究了合成类星体近邻区光谱作为约束类星体对视线距离的替代方法。发现对于小天空平面分离（d_sky≈10-100 pkpc），简单的峰值寻找算法可以轻易区分d_l.o.s. ≲1 pMpc和≈1 pMpc的情况。对于真实d_l.o.s. ≥3 pMpc的情况，d_l.o.s.估计的准确性约为0.2 pMpc。较大的天空平面分离（d_sky=1 pMpc）导致d_l.o.s.估计的绝对不确定性更大，但该方法仍能区分d_l.o.s. ≲4 pMpc和≈4 pMpc的情况。当真实d_l.o.s. ≳4 pMpc时，d_l.o.s.估计的不确定性约为0.5 pMpc。本文的概念验证研究展示了利用类星体近邻区约束类星体对三维配置的潜力，为表征类星体对提供了新途径。

英文摘要：

Recently discovered quasar pairs at high redshifts ($z\gtrsim$5) are likely precursors to supermassive black hole mergers, providing a promising window to high redshift quasar growth mechanisms. However, the large uncertainties on their relative distances along the line-of-sight ($d_{\rm l.o.s.}$) limits our ability to characterize quasar pairs. In this study, we explore synthetic quasar proximity zone spectra as an alternative method to constrain the line-of-sight distance of quasar pairs. We find that for small sky-plane separations ($d_{\rm sky}\approx 10-100$ pkpc), a simple peak finding algorithm can easily distinguish between scenarios of $d_{\rm l.o.s.} \lesssim1$ pMpc and $\gtrsim1$ pMpc. For cases where the true $d_{\rm l.o.s.} \geq 3$ pMpc, the accuracy of $d_{\rm l.o.s.}$ estimation is $\approx 0.2$ pMpc. Large sky-plane separations of $d_{\rm sky}=1$ pMpc have larger absolute uncertainties in $d_{\rm l.o.s.}$ estimates, but the method can still easily distinguish between scenarios where $d_{\rm l.o.s.}\lesssim4$ pMpc and $\gtrsim4$ pMpc. $d_{\rm l.o.s.}$ estimates have an uncertainty of $\approx$0.5 pMpc when true $d_{\rm l.o.s.} \gtrsim4$ pMpc. Our proof-of-concept study illustrates the potential use of quasar proximity zones to constrain the 3-dimensional quasar pair configuration, providing an avenue to characterize quasar pairs.

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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