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Quantifying image distortions caused by strong gravitational lensing and estimating the corresponding matter distribution in lensing galaxies has been primarily performed by maximum likelihood modeling of observations. This is typically a…

天体物理仪器与方法 · 物理学 2017-09-20 Yashar D. Hezaveh , Laurence Perreault Levasseur , Philip J. Marshall

Strong gravitational lensing acts as a cosmic telescope, enabling the study of the high-redshift universe. Astronomical interferometers, such as the Atacama Large Millimeter/submillimeter Array (ALMA), have provided high-resolution images…

Future large-scale surveys with high resolution imaging will provide us with a few $10^5$ new strong galaxy-scale lenses. These strong lensing systems however will be contained in large data amounts which are beyond the capacity of human…

天体物理仪器与方法 · 物理学 2018-03-14 C. Schaefer , M. Geiger , T. Kuntzer , J-P. Kneib

With the advent of next-generation surveys and the expectation of discovering huge numbers of strong gravitational lens systems, much effort is being invested into developing automated procedures for handling the data. The several orders of…

星系天体物理 · 物理学 2021-02-17 Jacob Maresca , Simon Dye , Nan Li

Forthcoming large imaging surveys such as Euclid and the Vera Rubin Observatory Legacy Survey of Space and Time are expected to find more than $10^5$ strong gravitational lens systems, including many rare and exotic populations such as…

In the coming years, a new generation of sky surveys, in particular, Euclid Space Telescope (2022), and the Rubin Observatory's Legacy Survey of Space and Time (LSST, 2023) will discover more than 200,000 new strong gravitational lenses,…

宇宙学与河外天体物理 · 物理学 2022-06-15 Ronan Legin , Yashar Hezaveh , Laurence Perreault Levasseur , Benjamin Wandelt

As we enter the era of large-scale imaging surveys with the up-coming telescopes such as LSST and SKA, it is envisaged that the number of known strong gravitational lensing systems will increase dramatically. However, these events are still…

天体物理仪器与方法 · 物理学 2021-07-14 Daniel Magro , Kristian Zarb Adami , Andrea DeMarco , Simone Riggi , Eva Sciacca

We present a new gravitational lens modelling technique designed to model high-resolution interferometric observations with large numbers of visibilities without the need to pre-average the data in time or frequency. We demonstrate the…

天体物理仪器与方法 · 物理学 2021-01-06 Devon Powell , Simona Vegetti , John P. McKean , Cristiana Spingola , Francesca Rizzo , Hannah R. Stacey

Dark matter cannot be observed directly, but its weak gravitational lensing slightly distorts the apparent shapes of background galaxies, making weak lensing one of the most promising probes of cosmology. Several observational studies have…

宇宙学与河外天体物理 · 物理学 2018-12-18 Dezső Ribli , Bálint Ármin Pataki , István Csabai

A new generation of sky surveys is poised to provide unprecedented volumes of data containing hundreds of thousands of new strong lensing systems in the coming years. Convolutional neural networks are currently the only state-of-the-art…

天体物理仪器与方法 · 物理学 2022-07-12 Ronan Legin , Connor Stone , Yashar Hezaveh , Laurence Perreault-Levasseur

Modeling strong gravitational lenses in order to quantify the distortions in the images of background sources and to reconstruct the mass density in the foreground lenses has traditionally been a difficult computational challenge. As the…

天体物理仪器与方法 · 物理学 2022-07-05 Alexandre Adam , Laurence Perreault-Levasseur , Yashar Hezaveh

In this work, we present our classification algorithm to identify strong gravitational lenses from wide-area surveys using machine learning convolutional neural network; LensExtractor. We train and test the algorithm using a wide variety of…

天体物理仪器与方法 · 物理学 2018-04-11 Milad Pourrahmani , Hooshang Nayyeri , Asantha Cooray

We present a novel machine learning based approach for detecting galaxy-scale gravitational lenses from interferometric data, specifically those taken with the International LOFAR Telescope (ILT), which is observing the northern radio sky…

星系天体物理 · 物理学 2022-08-03 S. Rezaei , J. P. McKean , M. Biehl , W. de Roo1 , A. Lafontaine

Objective: To allow efficient learning using the Recurrent Inference Machine (RIM) for image reconstruction whereas not being strictly dependent on the training data distribution so that unseen modalities and pathologies are still…

图像与视频处理 · 电气工程与系统科学 2020-12-15 Dimitrios Karkalousos , Kai Lønning , Hanneke E. Hulst , Serge O. Dumoulin , Jan-Jakob Sonke , Frans M. Vos , Matthan W. A. Caan

We explore the effectiveness of deep learning convolutional neural networks (CNNs) for estimating strong gravitational lens mass model parameters. We have investigated a number of practicalities faced when modelling real image data, such as…

天体物理仪器与方法 · 物理学 2019-07-24 James Pearson , Nan Li , Simon Dye

Modeling strong gravitational lenses in order to quantify the distortions in the images of background sources and to reconstruct the mass density in the foreground lenses has been a difficult computational challenge. As the quality of…

天体物理仪器与方法 · 物理学 2023-07-05 Alexandre Adam , Laurence Perreault-Levasseur , Yashar Hezaveh , Max Welling

The Euclid telescope, due for launch in 2021, will perform an imaging and slitless spectroscopy survey over half the sky, to map baryon wiggles and weak lensing. During the survey Euclid is expected to resolve 100,000 strong gravitational…

天体物理仪器与方法 · 物理学 2019-05-17 Andrew Davies , Stephen Serjeant , Jane M. Bromley

We present spectroscopic confirmation of candidate strong gravitational lenses using the Keck Observatory and Very Large Telescope as part of our ASTRO 3D Galaxy Evolution with Lenses (AGEL) survey. We confirm that 1) search methods using…

Since upcoming telescopes will observe thousands of strong lensing systems, creating fully-automated analysis pipelines for these images becomes increasingly important. In this work, we make a step towards that direction by developing the…

宇宙学与河外天体物理 · 物理学 2020-06-03 Marco Chianese , Adam Coogan , Paul Hofma , Sydney Otten , Christoph Weniger

Convolutional neural networks (CNNs) are the state-of-the-art technique for identifying strong gravitational lenses. Although they are highly successful in recovering genuine lens systems with a high true-positive rate, the unbalanced…

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