Cosmic flexion

@article{Arena2022CosmicF,
  title={Cosmic flexion},
  author={Evan J. Arena and David M. Goldberg and David Bacon},
  journal={Physical Review D},
  year={2022}
}
Cosmic flexion, like cosmic shear, is a correlation function whose signal originates from the large-scale structure of the Universe. Building on the observational success of cosmic shear, along with the unprecedented quality of large-scale cosmological datasets, the time is ripe to explore the practical constraints from cosmic flexion. Unlike cosmic shear, which has a broad window function for power, cosmic flexion is only measurable on small scales and therefore can uniquely place constraints on… 

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References

SHOWING 1-10 OF 69 REFERENCES

Cosmology with cosmic shear observations: a review

  • M. Kilbinger
  • Physics
    Reports on progress in physics. Physical Society
  • 2015
An outlook on the various future surveys and missions, for which cosmic shear is one of the main science drivers, and discuss promising new weak cosmological lensing techniques for future observations are discussed.

Weak gravitational flexion

Flexion is the significant third-order weak gravitational lensing effect responsible for the weakly skewed and arc-like appearance of lensed galaxies. Here we demonstrate how flexion measurements can

Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty

This work and its companion paper, Amon et al. [Phys. Rev. 105 , 023514 (2022)], present cosmic shear measurements and cosmological constraints from over 100 million source galaxies in the Dark

Dark energy survey year 3 results: Covariance modelling and its impact on parameter estimation and quality of fit

We describe and test the fiducial covariance matrix model for the combined 2-point function analysis of the Dark Energy Survey Year 3 (DES-Y3) dataset. Using a variety of new ansatzes for

Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with ΛCDM

We present an expanded sample of 75 Milky Way Cepheids with Hubble Space Telescope (HST) photometry and Gaia EDR3 parallaxes, which we use to recalibrate the extragalactic distance ladder and refine

Dark energy survey year 3 results: weak lensing shape catalogue

We present and characterize the galaxy shape catalogue from the first 3 yr of Dark Energy Survey (DES) observations, over an effective area of  4143 deg2 of the southern sky. We describe our data

Shape, colour, and distance in weak gravitational flexion

Canonically, elliptical galaxies might be expected to have a perfect rotational symmetry, making them ideal targets for flexion studies – however, this assumption has not been tested. We have

Baryonic effects for weak lensing. Part I. Power spectrum and covariance matrix

Baryonic feedback effects lead to a suppression of the weak lensing angular power spectrum on small scales. The poorly constrained shape and amplitude of this suppression is an important source of

Hubble Space Telescope Observations of Mira Variables in the SN Ia Host NGC 1559: An Alternative Candle to Measure the Hubble Constant

We present year-long, near-infrared Hubble Space Telescope (HST) WFC3 observations used to search for Mira variables in NGC 1559, the host galaxy of the Type Ia supernova (SN Ia) SN 2005df. This is
...