2个三重成像和15个四重成像的引力透镜类星体的HST成像、管道建模及时间延迟预测
HST imaging, pipeline modeling, and time-delay predictions of 2 triply-imaged and 15 quadruply-imaged lensed quasars
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中文总结 AI 辅助
本研究对17个引力透镜类星体开展统一建模，分类并确定其时间延迟距离不确定性，建议优先观测11个优质系统以助力解决哈勃-勒梅特定值张力。
中文摘要 AI 辅助
哈勃-勒梅特定值张力仍是现代宇宙学中的重大挑战，表现为早期宇宙宇宙微波背景测量与局域距离阶梯观测之间存在差异。强引力透镜时间延迟宇宙学为哈勃常数（H₀）提供了独立的几何探针，可帮助解决这一矛盾。尽管已发现数百个引力透镜类星体，但由于测量精确时间延迟及打破简并需要耗费大量资源的后续观测，仅少数得到分析。我们对17个新近发现的引力透镜类星体系统（2个三重成像、15个四重成像）开展统一引力透镜建模，以识别并确定未来宇宙学研究最具潜力的候选体优先级。利用高分辨率近红外哈勃空间望远镜WFC3/IR F160W成像（项目ID：17916，首席研究员：T. Treu），我们使用Lenstronomy开展统一管道建模，约束透镜星系的质量与光分布轮廓，并在假设基准宇宙学的前提下，预测其费马势差与预期时间延迟。我们的管道成功为全部17个系统生成了模型与时间延迟预测。假设理想监测条件，我们估算时间延迟与费马势建模误差对时间延迟距离的总贡献，据此按估计时间延迟距离不确定性对系统分类：6个“优秀”（≤3%）、5个“良好”（3%—7%）、3个“适宜”（7%—12%）、3个“不实用”（>12%）。我们建议优先对11个“优秀”与“良好”系统开展后续观测，这些系统有望提供对H₀的高精度独立约束，助力解决哈勃-勒梅特定值张力。
英文摘要
The Hubble tension remains a significant challenge in modern cosmology, exhibiting a discrepancy between early-Universe cosmic microwave background measurements and local distance ladder observations. Strong lensing time-delay cosmography provides an independent, geometric probe of $H_0$ that can help resolve this discrepancy. Although hundreds of lensed quasars have been discovered, only a handful have been analyzed due to the resource-intensive follow-up required to measure precise time delays and break degeneracies. We present uniform gravitational lens modeling of 17 recently discovered lensed quasar systems (2 triply-imaged and 15 quadruply-imaged) to identify and prioritize the most promising candidates for future cosmological study. Using high-resolution near-infrared Hubble Space Telescope WFC3/IR F160W imaging (PID: 17916, PI: T. Treu), we perform uniform pipeline modeling with Lenstronomy. We constrain the mass and light profiles of the deflector galaxies, and assuming a fiducial cosmology, we predict their Fermat potential differences and expected time delays. Our pipeline successfully yields models and time-delay predictions for all 17 systems. Assuming ideal monitoring conditions, we estimate the total contribution from time-delay and Fermat potential modeling errors to the time-delay distance. From this, we classify the systems by estimated time-delay distance uncertainties: six "excellent" ($\leq 3\%$), five "good" ($3\%$-$7\%$), three "suitable" ($7\%$-$12\%$), and three "impractical" ($>12\%$). We recommend prioritizing follow-up campaigns on the 11 "excellent" and "good" systems, which have the potential to deliver high-precision, independent constraints on $H_0$ to help resolve the Hubble tension.
发表机构
- University of California, Los Angeles（加州大学洛杉矶分校）
- STFC Hartree Centre（STFC哈特里中心）
- Universidad Andres Bello（安德烈斯贝略大学）
- Stony Brook University（石溪大学）
- University of Chicago（芝加哥大学）
- University of San Francisco（旧金山大学）
- Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）
- University of Cambridge（剑桥大学）
- Kavli Institute for Cosmology, University of Cambridge（剑桥大学卡弗里宇宙学研究所）
- Staples High School（斯塔普尔斯高中）
- Universidad de Valparaíso（瓦尔帕莱索大学）
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