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arXiv 2609.34615astro-ph.GAastro-ph.CO

KiDS-DR5:探索星系暗物质晕中的尘埃输运

KiDS-DR5: Exploring dust transport in dark matter halos of galaxies

发表机构鲁尔大学波鸿 · 哈佛-史密森天体物理中心 · 天体物理中心 | 哈佛与史密森学会
另 2 家 · 查看机构详情
  • Ruhr University Bochum(鲁尔大学波鸿)
  • Harvard-Smithsonian Center for Astrophysics(哈佛-史密森天体物理中心)
  • Center for Astrophysics | Harvard & Smithsonian(天体物理中心 | 哈佛与史密森学会)
  • Newcastle University(纽卡斯尔大学)
  • Leiden Observatory, Leiden University(莱顿大学莱顿天文台)

机构由 AI 辅助整理,请以论文原文为准。

Eray Genc, Angus H. Wright, Hendrik Hildebrandt, Dian P. Triani, Dominik J. Bomans, Benjamin Stölzner, Marika Asgari, Henk Hoekstra, Benjamin Joachimi, Shahab J… 展开作者

Eray Genc, Angus H. Wright, Hendrik Hildebrandt, Dian P. Triani, Dominik J. Bomans, Benjamin Stölzner, Marika Asgari, Henk Hoekstra, Benjamin Joachimi, Shahab Joudaki, Konrad Kuijken, Lauro Moscardini, Mario Radovich, Robert Reischke, Ziang Yan

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中文总结 AI 辅助

本研究利用KiDS-DR5数据联合建模多波段星等偏移和引力透镜信号,测量星系暗物质晕质量与尘埃含量,发现恒星质量与尘埃质量呈线性关系,但比模型预测更平坦,表明尘埃反馈机制需改进。

中文摘要 AI 辅助

我们分析了千度巡天最终数据发布(KiDS-DR5)中一个定义明确的星系样本,该样本通过星等、光度红移和恒星质量截断进行选择,以测量其平均暗物质晕质量和环星系尘埃含量随恒星质量的变化。我们的目标是为星系晕中运行的尘埃输运机制(如恒星和活动星系核驱动的外流)提供经验约束。我们利用MICE2模拟开发并验证了一种新的测量和建模框架,该框架纳入了现实的环星系尘埃消光情景。利用该框架,我们联合建模多波段($ugriZYJHK_{\ m s}$)星等偏移和星系-星系引力透镜信号,以推断$z_{\ m B} < 0.4$处透镜星系的平均暗物质晕质量和尘埃质量,并在KiDS-DR5中按五个恒星质量区间进行分析。该建模联合描述了暗物质晕质量分布和尘埃消光,包括与邻近暗物质晕相关的尘埃。我们证明,数据要求包含卫星星系比例和来自邻近暗物质晕的尘埃消光。我们发现恒星质量与尘埃质量之间存在线性关系,这与先前的观测研究一致,但比半解析模型\ extsc{Dusty-SAGE}的预测更平坦。这一差异可能表明,当前星系形成模型中与尘埃相关的反馈实现需要进一步改进。

英文摘要

We analyse a well-defined sample of galaxies from the final data release of the Kilo-Degree Survey (KiDS-DR5), selected using magnitude, photometric redshift, and stellar mass cuts, to measure their mean halo mass and circumgalactic dust content as a function of stellar mass. Our goal is to provide empirical constraints on dust transport mechanisms, such as stellar- and AGN-driven outflows, operating in galaxy halos. We develop and validate a new measurement and modelling framework using the MICE2 simulation, incorporating a realistic circumgalactic dust extinction scenario. Using this framework, we jointly model multiband ($ugriZYJHK_{\rm s}$) magnitude shifts and galaxy--galaxy lensing signals to infer the mean halo mass and dust mass of lens galaxies at $z_{\rm B} < 0.4$, analysed in five stellar-mass bins in KiDS-DR5. The modelling jointly describes the halo mass distribution and dust extinction, including dust associated with neighbouring halos. We demonstrate that the inclusion of a satellite fraction and dust extinction from neighbouring halos is required by the data. We find a linear relation between stellar mass and dust mass, consistent with previous observational studies, but flatter than predictions from the semi-analytic model \textsc{Dusty-SAGE}. This difference may indicate that current implementations of dust-related feedback in galaxy formation models require further refinement.

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