AI 中文总结
该研究提出一种无需建模星系-物质关联的方法，通过交叉关联kSZ模板与CMB温度，可高精度约束重子反馈对物质功率谱的抑制，有望解决弱引力透镜巡天的系统误差问题。
AI 中文摘要
重子反馈会在暗物质晕内部及周围重新分布气体，其抑制小尺度物质功率谱的程度，目前已成为即将开展的弱引力透镜巡天的主要系统误差源。运动学 Sunyaev-Zeldovich（kSZ）效应可直接探测这种被重新分布的气体，但现有星系周围的测量要么与所选星系样本的属性绑定，要么易受其他河外前景的偏差影响。我们通过交叉关联从层析弱引力透镜汇聚图构建的kSZ模板，以及由星系巡天通过连续性方程重建的径向速度图，与观测到的CMB温度，来解决上述两个问题。我们对Rubin LSST Y10和Roman运动学透镜样本，结合ACT、SO和CMB-HD进行可探测性预测，发现对于当前及即将到来的CMB数据，信噪比约为5-15，对于CMB-HD则大于100，分别对应对物质功率谱重子抑制的百分之几和亚百分之一的约束。因此，该方法应能达到足够的统计精度，为Rubin建模重子反馈效应，且无需面临建模任何星系-物质关联的系统误差挑战。
英文摘要
Baryonic feedback redistributes gas within and around dark matter haloes, suppressing the small-scale matter power spectrum at a level that is now the leading systematic for upcoming weak-lensing surveys. The kinetic Sunyaev-Zeldovich (kSZ) effect directly probes this redistributed gas, but existing measurements around galaxies are either tied to the properties of the chosen galaxy sample or are susceptible to biases from other extragalactic foregrounds. We address both by cross-correlating a kSZ template constructed from the tomographic weak-lensing convergence maps and the radial velocity maps reconstructed from galaxy surveys via the continuity equation, with the observed CMB temperature. We forecast the detectability for Rubin LSST Y10 and Roman kinematic lensing samples combined with ACT, SO, and CMB-HD, finding signal-to-noise ratios of $\sim$ 5-15 for current and upcoming CMB data and $\gtrsim 100$ for CMB-HD, corresponding to few-per-cent and sub-per-cent constraints, respectively, on the baryonic suppression of the matter power spectrum. This method should thus achieve sufficient statistical precision to model baryonic feedback effects for Rubin, without the systematic challenge of modeling any galaxy-matter connection.
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