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Title: Constraining the mass-concentration relation through weak lensing peak function

Halo masses and concentrations have been studied extensively, by means of N-body simulations as well as observationally, during the last decade. Nevertheless, the exact form of the mass-concentration relation is still widely debated. One of the most promising method to estimate masses and concentrations relies on gravitational lensing from massive halos. Here we investigate the impact of the mass-concentration relation on halo peak abundance in weak lensing shear maps relying on the aperture mass method for peak detections. After providing a prescription to take into account the concentration dispersion (always neglected in previous works) in peak number counts predictions, we assess their power to constrain the mass-concentration relation by means of Fisher matrix technique. We find that, when combined with different cosmological probes, peak statistics information from near-future weak lensing surveys provides an interesting and complementary alternative method to lessen the long standing controversy about the mass-concentration relation.
Authors:
 [1] ;  [2]
  1. Physics Department, University of Milano-Bicocca, Piazza della Scienza 3, I20126, Milano (Italy)
  2. INAF — Astronomical Observatory of Rome, via Frascati 33, I00044, Monte Porzio Catone (RM) (Italy)
Publication Date:
OSTI Identifier:
22373368
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; FUNCTIONS; GRAVITATIONAL LENSES; MAPS; MASS; MATRICES; PEAKS; PROBES; SIMULATION