Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Hamana, Takashi [VerfasserIn]  |
| Bartelmann, Matthias [VerfasserIn]  |
Titel: | Statistical distribution of gravitational-lensing excursion angles |
Titelzusatz: | winding ways to us from the deep universe |
Verf.angabe: | Takashi Hamana, Matthias Bartelmann, Naoki Yoshida, Christoph Pfrommer |
Fussnoten: | Gesehen am 26.09.2017 |
Titel Quelle: | Enthalten in: De.arxiv.org |
Jahr Quelle: | 2008 |
Band/Heft Quelle: | (2008) Artikel-Nummer 0407599, 11 Seiten |
Abstract: | We investigate statistical distributions of differences in gravitational-lensing deflections between two light rays, the so-called lensing excursion angles. A probability distribution function of the lensing excursion angles, which plays a key role in estimates of lensing effects on angular clustering of objects (such as galaxies, QSOs and also the CMB temperature map), is known to consist of two components; a Gaussian core and an exponential tail. We use numerical gravitational-lensing experiments in a Lambda-CDM cosmology for quantifying these two components. We especially focus on the physical processes responsible for generating those two components. We develop a simple empirical model for the exponential tail which allows us to explore its origin. We find that the tail is generated by the coherent lensing scatter by massive halos with M>10^14h^-1Msun at z<1 and that its exponential shape arises due to the exponential cut-off of the halo mass function at that mass range. On scales larger than 1 arc minute, the tail does not have a practical influence on the lensing effects on the angular clustering. Our model predicts that the coherent scatter may have non-negligible effects on angular clustering at sub-arcminute scales. |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Kostenfrei: Verlag: http://arxiv.org/abs/astro-ph/0407599 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1563815842 |
Verknüpfungen: | → Sammelwerk |
Statistical distribution of gravitational-lensing excursion angles / Hamana, Takashi [VerfasserIn] (Online-Ressource)
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