Testing the reliability of weak lensing cluster detections

• Verfasst von: Pace, Francesco [VerfasserIn]
• Verfasst von: Maturi, Matteo [VerfasserIn]
• Verfasst von: Bartelmann, Matthias [VerfasserIn]
• Titel: Testing the reliability of weak lensing cluster detections
• Verf.angabe: Francesco Pace, Matteo Maturi, Massimo Meneghetti, Matthias Bartelmann, Lauro Moscardini, Klaus Dolag
• E-Jahr: 2013
• Jahr: December 13, 2013
• Umfang: 14 S.
• Fussnoten: Gesehen am 25.09.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2013
• Band/Heft Quelle: (2013) Artikel-Nummer 0702031, 14 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Astrophysics
• K10plus-PPN: 1563777924

Abstract

We study the reliability of dark-matter halo detections with three different linear filters applied to weak-lensing data. We use ray-tracing in the multiple lens-plane approximation through a large cosmological simulation to construct realizations of cosmic lensing by large-scale structures between redshifts zero and two. We apply the filters mentioned above to detect peaks in the weak-lensing signal and compare them with the true population of dark matter halos present in the simulation. We confirm the stability and performance of a filter optimized for suppressing the contamination by large-scale structure. It allows the reliable detection of dark-matter halos with masses above a few times 1e13 M_sun/h with a fraction of spurious detections below ~10%. For sources at redshift two, 50% of the halos more massive than ~7e13 M_sun/h are detected, and completeness is reached at ~2e14 M_sun/h.