Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Ménard, Brice [VerfasserIn]  |
| Bartelmann, Matthias [VerfasserIn]  |
Titel: | Cosmological information from quasar-galaxy correlations induced by weak lensing |
Verf.angabe: | Brice Menard and Matthias Bartelmann |
Fussnoten: | Gesehen am 27.09.2017 |
Titel Quelle: | Enthalten in: De.arxiv.org |
Jahr Quelle: | 2014 |
Band/Heft Quelle: | (2014) Artikel-Nummer 0203163, 11 Seiten |
Abstract: | The magnification bias of large-scale structures, combined with galaxy biasing, leads to a cross-correlation of distant quasars with foreground galaxies on angular scales of the order of arc minutes and larger. The amplitude and angular shape of the cross-correlation function w_QG contain information on cosmological parameters and the galaxy bias factor. While the existence of this cross-correlation has firmly been established, existing data did not allow an accurate measurement of w_QG yet, but wide area surveys like the Sloan Digital Sky Survey now provide an ideal database for measuring it. However, w_QG depends on several cosmological parameters and the galaxy bias factor. We study in detail the sensitivity of w_QG to these parameters and develop a strategy for using the data. We show that the parameter space can be reduced to the bias factor b, Omega_0 and sigma_8, and compute the accuracy with which these parameters can be deduced from SDSS data. Under reasonable assumptions, it should be possible to reach relative accuracies of the order of 5%-15% for b, Omega_0, and sigma_8. This method is complementary to other weak-lensing analyses based on cosmic shear. |
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/0203163 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1563846276 |
Verknüpfungen: | → Sammelwerk |
Cosmological information from quasar-galaxy correlations induced by weak lensing / Ménard, Brice [VerfasserIn] (Online-Ressource)
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