arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.2344astro-ph.CO
收藏

低质量高红移引力透镜B0128 +437的自适应光学观测

Adaptive Optics Observations of B0128+437: A Low-Mass, High-Redshift Gravitational Lens

David J. Lagattuta, Matthew W. Auger, Christopher D. Fassnacht

摘要:

我们使用高分辨率的自适应光学(AO)成像的凯克II望远镜研究引力透镜B0128+437在前所未有的细节,使我们能够解决个别透镜类星体组件,并首次检测和测量透镜星系的属性。B0128+437是一个小的分离透镜,具有已知的通量比和天体测量异常。我们讨论了这些异常的可能原因,包括存在的子结构的透镜星系,由于尘埃和湍流星际介质的传播效应,引力微透镜。对B0128的这项工作表明,AO将成为研究未来调查中预期的许多新的小分离透镜的重要工具。

英文摘要:

We use high-resolution adaptive optics (AO) imaging on the Keck II telescope to study the gravitational lens B0128+437 in unprecedented detail, allowing us to resolve individual lensed quasar components and, for the first time, detect and measure properties of the lensing galaxy. B0128+437 is a small separation lens with known flux-ratio and astrometric anomalies. We discuss possible causes for these anomalies, including the presence of substructure in the lensing galaxy, propagation effects due to dust and a turbulent interstellar medium, and gravitational microlensing. This work on B0128 demonstrates that AO will be an essential tool for studying the many new small-separation lenses expected from future surveys.

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。

↑