Using infrared spectra of the z = 1.693 quadruply lensed quasar HE0435-1223 acquired in 2009 with the spectrograph SINFONI at the ESO Very Large Telescope, we have detected a clear microlensing effect in images A and D. While microlensing affects the blue and red wings of the Hα line profile in image D very differently, it de-magnifies the line core in image A. The combination of these different effects sets constraints on the line-emitting region; these constraints suggest that a rotating ring is at the origin of the Hα line. Visible spectra obtained in 2004 and 2012 indicate that the MgII line profile is microlensed in the same way as the Hα line. Our results therefore favour flattened geometries for the low-ionization line-emitting region, for example, a Keplerian disk. Biconical models cannot be ruled out but require more fine-tuning. Flux ratios between the different images are also derived and confirm flux anomalies with respect to estimates from lens models with smooth mass distributions.
HST imaging, pipeline modeling, and time-delay predictions of 2 triply-imaged and 15 quadruply-imaged lensed quasars
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)
JWST lensed quasar dark matter survey V: Hints of self-interacting dark matter from 29 quadruply imaged quasars
University of Chicago(芝加哥大学);Kavli Institute for Cosmological Physics, University of Chicago(芝加哥大学卡弗里宇宙学物理研究所);University of California, Merced(加州大学默塞德分校);Perimeter Institute for Theoretical Physics(理论物理前沿研究所);Carnegie Observatories(卡内基观测站);University of California, Los Angeles(加州大学洛杉矶分校);University of California, Irvine(加州大学尔湾分校);Universidad Andres Bello(安德烈斯贝略大学);Millennium Institute of Astrophysics, Chile(智利天体物理千年研究所);California Polytechnic State University(加州州立理工大学)
Constraining the geometry and kinematics of the quasar broad emission line region using gravitational microlensing. II. Comparing models with observations in the lensed quasar HE0435-1223
Persephone's Torch: A 15th Magnitude Quadruply-Lensed Quasar From the Couch Discovered with SPHEREx and the LBT
Max-Planck-Institut für Astronomie(马克斯·普朗克天文学研究所);Heidelberg University(海德堡大学);INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna(意大利国家天体物理研究所博洛尼亚天文与空间科学观测站);Large Binocular Telescope Observatory, University of Arizona(亚利桑那大学大双筒望远镜天文台)
Ultra-light dark matter (ULDM) refers to a class of theories, including ultra-light axions, in which particles with mass $m_ψ < 10^{-20}\, \rm{eV}$ comprise a significant fraction of the dark matter. A galactic scale de Broglie wavelength distinguishes these theories from cold dark matter (CDM), suppressing the overall abundance of structure on sub-galactic scales, and producing wave-like interference phenomena in the density profiles of halos. With the aim of constraining the particle mass, we analyze the flux ratios in a sample of eleven quadruple-image strong gravitational lenses. We accoun…
TDCOSMO: XX. WFI2033--4723, the First Quadruply-Imaged Quasar Modeled with JWST Imaging
Department of Physics and Astronomy, UCLA(加州大学洛杉矶分校物理与天文系);Department of Physics and Astronomy, Stony Brook University(纽约州立大学石溪分校物理与天文系);Department of Astronomy and Astrophysics, University of Chicago(芝加哥大学天文与天体物理系);Kavli Institute for Cosmological Physics, University of Chicago(芝加哥大学卡弗里宇宙物理学研究所);Center for Astronomy, Space Science and Astrophysics, Independent University, Bangladesh(孟加拉国独立大学天文学、空间科学与天体物理中心);Research Center for the Early Universe, Graduate School of Science, The University of Tokyo(东京大学理学研究科早期宇宙研究中心);IPAC, California Institute of Technology(加州理工学院红外处理分析中心);Space Telescope Science Institute(太空望远镜科学研究所)
Gaia GraL: Gaia DR2 Gravitational Lens Systems. III. A systematic blind search for new lensed systems
目标:在这项工作中,我们的目标是提供一个可靠的引力透镜(GL)候选人的基础上,在整个盖亚数据发布2(盖亚DR2)进行搜索。我们还表明,来自盖亚卫星的唯一天体测量和测光信息为监督学习方法提供了足够的见解,可以自动识别GL候选者,其效率与基于图像处理的方法相当。研究方法:我们模拟了106,623,188个由两个以上图像组成的透镜系统,基于在存在外部剪切的情况下表征非奇异等温椭球透镜模型的规则参数网格。这些模拟被用作训练和测试我们的监督学习模型的输入,该模型由极端随机树组成。后者最终用于为2,129,659个天体集群中的每个集群分配一个判别值,该判别值反映了我们的模拟与每个集群的观测相对位置和通量相匹配的能力。一旦补充了额外的约束条件,这些判别值允许我们从聚类列表中识别GL候选。结果如下:我们报告发现了15个新的四重成像透镜候选者,角间距小于6”,并通过恢复13个已知的四重成像系统中的12个来评估我们方法的性能,这些系统的所有组件都在Gaia DR 2中检测到,偶然的星团作为透镜系统的错误分类率低于1%。类似地,我们的方法关于四重成像系统的识别能力,其中在盖亚DR2中检测到三个图像,通过恢复13个已知的四重成像系统中的10个来评估,其中一个构成图像被丢弃。相关的误分类率在5.8%到20%之间变化,这取决于我们决定删除的图像。
Time-delay and lens galaxy redshift in the doubly imaged quasar PS J2305+3714
Ulugh Beg Astronomical Institute(乌鲁伯格天文研究所);Universidad de Cantabria(坎塔布里亚大学);O.Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Sciences of Ukraine(乌克兰国家科学院 O.Ya. 乌西科夫无线电物理与电子研究所);Institute of Astronomy, Kharkiv V.N. Karazin National University(哈尔科夫 V.N. 卡拉津国立大学天文学研究所);Observatoire de la Côte d’Azur(蔚蓝海岸天文台);Institute of Radio Astronomy, National Academy of Sciences of Ukraine(乌克兰国家科学院无线电物理研究所);Chirchik State Pedagogical University(奇尔奇克国立师范学院);National University of Uzbekistan(乌兹别克斯坦国立大学);ICC-UB Institut de Ciéncies del Cosmos, University of Barcelona(巴塞罗那宇宙科学研究所 (ICCUB))
Gravitationally Lensed Quasar SDSS J1442+4055: Redshifts of Lensing Galaxies, Time Delay, Microlensing Variability, and Intervening Metal System at z ~ 2
Constraining the Physical Properties of Quadruply Lensed Quasars using Optical-to-X-Ray Data
Liège Université(列日大学);Universiteit Gent(根特大学);Leibniz-Institut für Astrophysik Potsdam (AIP)(波茨坦阿基米德天体物理研究所);University of Chicago(芝加哥大学);University of California, Los Angeles(加州大学洛杉矶分校);Universidad Andres Bello(安德斯贝略大学);University of California, Merced(加州大学默塞德分校)
Joining forces: 30 years of optical monitoring of the Einstein Cross
Instituto de Física de Cantabria (CSIC-UC)(坎塔布里亚物理研究所);Universidad de Cantabria(坎塔布里亚大学);O.Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Sciences of Ukraine(乌克兰国家科学院 O.Ya. 乌西科夫无线电物理与电子学研究所);Escuela Superior de Ingeniería y Tecnología, Universidad Internacional de La Rioja (UNIR)(里奥哈国际大学高等工程与技术学院);Instituto de Física y Astronomía, Universidad de Valparaíso(瓦尔帕莱索大学物理与天文研究所);Department of Physics, United States Naval Academy(美国海军学院物理系);Instituto de Astrofísica de Canarias(加那利天体物理研究所);Universidad de La Laguna(拉古纳大学);Department of Astronomy and Atmospheric Science, Faculty of Science, Kyoto Sangyo University(京都产业大学理学院天文与大气科学系);Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange(蔚蓝海岸大学、蔚蓝海岸天文台、法国国家科学研究中心拉格朗日实验室)
Microcaustics: Fast GPU-Accelerated Dynamical Microlensing of Time-Dependent Extended Sources
Stony Brook University(石溪大学);The Graduate Center of the City University of New York(纽约市立大学研究生中心);American Museum of Natural History(美国自然历史博物馆);Lehman College of the CUNY(纽约市立大学莱曼学院);Dunlap Institute, University of Toronto(多伦多大学邓普研究所);Canadian Data Intensive Astrophysics PLatform (CanDIAPL)(加拿大数据密集型天体物理平台(CanDIAPL));Ciela - Montreal Institute for Astrophysical Data Analysis and Machine Learning(Ciela-蒙特利尔天体物理数据分析与机器学习研究所);Université de Montréal(蒙特利尔大学);Mila - Quebec Artificial Intelligence Institute(Mila-魁北克人工智能研究所)
Flux-ratio anomalies in cusp quasars reveal dark matter beyond CDM
Purple Mountain Observatory, Chinese Academy of Sciences(中国科学院紫金山天文台);School of Astronomy and Space Sciences, University of Science and Technology of China(中国科学技术大学天文与空间科学学院);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);Institute for Frontier in Astronomy and Astrophysics, Beijing Normal University(北京师范大学前沿天文与天体物理研究所)
TDCOSMO XXVI: Uniform lens modeling of eight doubly imaged quasars
Stony Brook University(石溪大学);University of Chicago(芝加哥大学);Independent University, Bangladesh(孟加拉独立大学);Stockholm University(斯德哥尔摩大学);ETH Zurich(苏黎世联邦理工学院);Université de Genève(日内瓦大学);Universidad de Valparaíso(瓦尔帕莱索大学);University of Liège(列日大学);Universitat de Barcelona(巴塞罗那大学);Institut Català de Recerca i Estudis Avançats (ICREA)(加泰罗尼亚高级研究所);Institut dEstudis Espacials de Catalunya (IEEC)(加泰罗尼亚空间研究研究所)
SN 2022riv in RX J2129: Discovery, Spectroscopic Classification, and Microlensing of a Strongly Lensed Type Ia Supernova from JWST and HST Observations
University of Minnesota(明尼苏达大学);Oklahoma State University(俄克拉荷马州立大学);Space Telescope Science Institute(太空望远镜科学研究所);Chiba University(千叶大学);Instituto de Física de Cantabria(坎塔布里亚物理研究所)
The X-Ray Continuum Emission Region in the Lensed Quasar SDSS J133907.23+131038.6 is Much Smaller than the Accretion Disk
United States Naval Academy(美国海军学院);The University of Oklahoma(俄克拉荷马大学);Instituto de Física de Cantabria (CSIC-UC)(坎塔布里亚物理研究所(西班牙国家研究委员会-坎塔布里亚大学));O.Ya. Usikov Institute for Radiophysics and Electronics(O.Ya.乌西科夫无线电物理与电子研究所);College of Charleston(查尔斯顿学院)