We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Gravitational Lensing Constraint on the Cosmic Equation of State.
- Authors
Jain, Deepak; Dev, Abha; Panchapakesan, N.; Mahajan, S.; Bhatia, V. B.; Ahluwalia, D. V.
- Abstract
Recent redshift-distance measurements of Type Ia supernovae (SNe Ia) at cosmological distances suggest that two-third of the energy density of the universe is dominated by dark energy component with an effective negative pressure. This dark energy component is described by the equation of state p[SUBx] = wρx (w ≥ -1). We use gravitational lensing statistics to constrain the equation of state of this dark energy. We use n(Δθ), the image separation distribution function of lensed quasars, as a tool to probe w. We find that for the observed range of Ω[SUBm] ∼ 0:2-0.4, w should lie between -0:8 ≤ w ≤ -0:4 in order to have five lensed quasars in a sample of 867 optical quasars. This limit is highly sensitive to lens and Schechter parameters and the evolution of galaxies.
- Subjects
REDSHIFT; TYPE I supernovae; ASTROPHYSICS; METAPHYSICAL cosmology; GALACTIC X-ray sources
- Publication
International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology, 2003, Vol 12, Issue 5, p953
- ISSN
0218-2718
- Publication type
Article
- DOI
10.1142/S0218271803003062