Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-09-03
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Submitted to ApJ
Scientific paper
Weak gravitational lensing has proven to be a powerful tool to map directly the distribution of dark matter in the Universe. The technique, currently used, relies on the accurate measurement of the gravitational shear that corresponds to the first-order distortion of the background galaxy images. More recently, a new technique has been introduced that relies on the accurate measurement of the gravitational flexion that corresponds to the second-order distortion of the background galaxy images. This technique should probe structures on smaller scales than that of a shear analysis. The goal of this paper is to compare the ability of shear and flexion to reconstruct the dark matter distribution by taking into account the dispersion in shear and flexion measurements. Our results show that the flexion is less sensitive than shear for constructing the convergence maps on scales that are physically feasible for mapping, meaning that flexion alone not be used to do convergence map reconstruction, even on small scales.
Amara Adam
Pires Sandrine
No associations
LandOfFree
Weak Lensing Mass Reconstruction: Flexion vs Shear does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Weak Lensing Mass Reconstruction: Flexion vs Shear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Weak Lensing Mass Reconstruction: Flexion vs Shear will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-685162