Cosmic Shear with Einstein Rings

  title={Cosmic Shear with Einstein Rings},
  author={Simon Birrer and Alexandre R{\'e}fr{\'e}gier and Adam Amara},
  journal={The Astrophysical Journal Letters},
We explore a new technique to measure cosmic shear using Einstein rings. In Birrer et al., we showed that the detailed modeling of Einstein rings can be used to measure external shear to high precision. In this Letter, we explore how a collection of Einstein rings can be used as a statistical probe of cosmic shear. We present a forecast of the cosmic shear information available in Einstein rings for different strong lensing survey configurations. We find that, assuming that the number density… 
Combining strong and weak lensing estimates in the Cosmos field
We present a combined cosmic shear analysis of the modeling of line-of-sight distortions on strongly lensed extended arcs and galaxy shape measurements in the COSMOS field. We develop a framework to
Gravitational Lensing Formalism in a Curved Arc Basis: A Continuous Description of Observables and Degeneracies from the Weak to the Strong Lensing Regime
  • S. Birrer
  • Physics
    The Astrophysical Journal
  • 2021
Gravitationally lensed curved arcs provide a wealth of information about the underlying lensing distortions. Extracting precise lensing information from extended sources is a key component in many
Line-of-sight effects in strong gravitational lensing
While most strong-gravitational-lensing systems may be roughly modelled by a single massive object between the source and the observer, in the details all the structures near the light path
Snowmass2021 Cosmic Frontier White Paper: Enabling Flagship Dark Energy Experiments to Reach their Full Potential
A new generation of powerful dark energy experiments will open new vistas for cosmology in the next decade. However, these projects cannot reach their utmost potential without data from other
Wide-field Multi-object Spectroscopy to Enhance Dark Energy Science from LSST
Community access to deep (i ~ 25), highly-multiplexed optical and near-infrared multi-object spectroscopy (MOS) on 8-40m telescopes would greatly improve measurements of cosmological parameters from
H0LiCOW – IX. Cosmographic analysis of the doubly imaged quasar SDSS 1206+4332 and a new measurement of the Hubble constant
We present a blind time-delay strong lensing (TDSL) cosmographic analysis of the doubly imaged quasar SDSS 1206+4332 . We combine the relative time delay between the quasar images, Hubble Space
lenstronomy: Multi-purpose gravitational lens modelling software package
Reconstructing the gravitational lensing potential from the Lyman-α forest
We demonstrate a method for reconstructing the weak lensing potential from the Lyman-$\alpha$ forest data. We derive an optimal estimator for the lensing potential on the sky based on the correlation
Hierarchical Inference with Bayesian Neural Networks: An Application to Strong Gravitational Lensing
This work incorporates BNNs with flexible posterior parameterizations into a hierarchical inference framework that allows for the reconstruction of population hyperparameters and removes the bias introduced by the training distribution.


Weak Gravitational Lensing and Its Cosmological Applications
Weak gravitational lensing is a unique probe of the dark side of the universe: It provides a direct way to map the distribution of dark matter around galaxies and clusters of galaxies as well as on
External Shear in Quadruply Imaged Lens Systems
We use publicly available N-body simulations and semianalytic models of galaxy formation to estimate the levels of external shear due to structure near the lens in gravitational lens systems. We also
Seeing in the dark – II. Cosmic shear in the Sloan Digital Sky Survey
Statistical weak lensing by large-scale structure – cosmic shear – is a promising cosmological tool, which has motivated the design of several large upcoming surveys. Here, we present a measurement
Stripe 82 in the Sloan Digital Sky Survey was observed multiple times, allowing deeper images to be constructed by co-adding the data. Here, we analyze the ellipticities of background galaxies in
Cosmology with weak lensing surveys.
  • D. Munshi, P. Valageas
  • Physics
    Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
  • 2005
Cosmic shear measurements with Dark Energy Survey science verification data
We present measurements of weak gravitational lensing cosmic shear two-point statistics using Dark Energy Survey Science Verification data. We demonstrate that our results are robust to the choice of
Weak gravitational lensing of distant galaxies
We analyze the two-point statistics of the gravitationally induced ellipticities of distant images whick provide a direct probe of the mass fluctuation spectrum P(k). The analysis extends previous
Detection of weak gravitational lensing distortions of distant galaxies by cosmic dark matter at large scales
The detection of cosmic shear on angular scales of up to half a degree is reported using 145,000 galaxies and along three separate lines of sight and it is found that the dark matter is distributed in a manner consistent with either an open universe, or a flat universe that is dominated by a cosmological constant.
Detection of weak gravitational lensing by large-scale structure
We report a detection of the coherent distortion of faint galaxies arising from gravitational lensing by foreground structures. This ‘cosmic shear’ is potentially the most direct measure of the mass
Weak gravitational lensing
This brief review of the advances made in weak gravitational lensing over the last 8 years, concentrating on the large scales cosmic shear, considers the prospects for probing Dark Energy and extra-dimensional gravity theories with future experiments.