Gravitational lenses as cosmic rulers: $\mathsf{\Omega_{m}}$, $\mathsf{\Omega_{\Lambda}}$ from time delays and velocity dispersions

Autor:	D. Paraficz, Jens Hjorth
Rok vydání:	2009
Předmět:	Physics Standard ruler Angular diameter distance Dark matter Velocity dispersion Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Cosmology law.invention Lens (optics) Gravitational lens Space and Planetary Science law Angular diameter
Zdroj:	Astronomy & Astrophysics. 507:L49-L52
ISSN:	1432-0746 0004-6361
Popis:	We show that a cosmic standard ruler can be constructed from the joint measurement of the time delay, , between gravitationally lensed quasar images and the velocity dispersion, σ , of the lensing galaxy. This is specifically shown, for a singular isothermal sphere lens, , where D OL is the angular diameter distance to the lens. Using MCMC simulations we illustrate the constraints set in the plane from future observations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1cb8675057af847fcc4a2d1b0d631233 https://doi.org/10.1051/0004-6361/200913307 Zobrazit plný text záznamu