TDCOSMO XXIX：JWST/NIRSpec积分场单元的三个强引力透镜的空间分辨运动学研究
TDCOSMO XXIX: JWST/NIRSpec IFU Spatially Resolved Kinematics of Three Time-delay Lenses
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- University of California, Los Angeles（加州大学洛杉矶分校）
- University of Chicago（芝加哥大学）
- Independent University, Bangladesh（孟加拉独立大学）
- University of Oxford（牛津大学）
- Space Telescope Science Institute（太空望远镜科学研究所）
- Stony Brook University（石溪大学）
- Tohoku University（东北大学）
机构由 AI 辅助整理，请以论文原文为准。
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中文总结 AI 辅助
该研究利用JWST-NIRSpec积分场光谱获取三个强引力透镜系统的空间分辨恒星运动学，修正源红移，为后续TDCOSMO 2026结合多类数据测量宇宙学参数提供关键运动学约束。
中文摘要 AI 辅助
空间分辨恒星运动学对利用强引力透镜类星体时间延迟实现高精度宇宙学探测至关重要。结合高分辨率成像和透镜建模，偏转星系的二维分辨运动学动力学模型可严格约束质量分布并打破质量片简并性，进而在纳入时间延迟后对哈勃常数给出严格约束。我们从詹姆斯·韦布空间望远镜近红外光谱仪（JWST-NIRSpec）积分场光谱中提取了四重引力透镜类星体系统HE0435-1223、PG1115+080和WFI2033-4723中偏转星系的恒星运动学。运动学图的每个分箱总不确定度（统计与系统）平均为6%-11%，分箱间相关误差仅约1.2%。孔径积分速度弥散与此前TDCOSMO分析所用值在统计上一致（均在0.9σ以内），因数据降维和运动学提取方法的改进，其平均不确定度从3.7%降至2.4%。在所探测半径内，我们将PG1115+080归类为快旋转体，HE0435-1223和WFI2033-4723归类为慢旋转体，并通过透镜宿主星系的运动学修正了源红移。这些运动学图将与时间延迟、透镜模型和视线汇聚估计相结合，用于即将发布的TDCOSMO 2026里程碑出版物中测量宇宙学参数。
英文摘要
Spatially resolved stellar kinematics are critical to the high precision achieved by cosmological probes utilizing time delays of strongly lensed quasars. Combined with high-resolution imaging and lens modeling, dynamical models of the 2D resolved kinematics of the deflector galaxy tightly constrain the mass profile and break the mass-sheet degeneracy, in turn providing tight constraints on the Hubble constant when the time delays are included. We extract stellar kinematics of the deflector galaxies in the quadruply lensed quasar systems HE0435-1223, PG1115+080, and WFI2033-4723 from James Webb Space Telescope Near-Infrared Spectrograph (JWST-NIRSpec) integral field spectroscopy. The kinematic maps reach average per-bin total (statistical and systematic) uncertainties of 6-11%, with average bin-to-bin correlated errors of only $\sim 1.2\%$. The aperture-integrated velocity dispersions are statistically consistent with the values used in the previous TDCOSMO analysis (all within $0.9σ$), with their average uncertainty reduced from 3.7% to 2.4% owing to improvements in the data reduction and kinematic-extraction methodology. We classify PG1115+080 as a fast rotator, HE0435-1223 and WFI2033-4723 as slow rotators within the probed radii, and we refine the source redshifts from the kinematics of the lensed host galaxies. Kinematic maps will be combined with time delays, lens models, and line-of-sight convergence estimates to measure cosmological parameters in the upcoming TDCOSMO 2026 milestone publication.
