SIMBAD references

1999ApJ...516...18R - Astrophys. J., 516, 18-26 (1999/May-1)

Constraints on H0 from the central velocity dispersions of lens galaxies.


Abstract (from CDS):

We employ Schwarzschild's method of the orbit modeling to constrain the mass profiles of the central lens galaxies in Q0957+561 and PG 1115+080. We combine the measured, central projected stellar velocity dispersions of these galaxies with the self-similar radial profiles of the rms velocity and of the Gauss-Hermite moment h4 observed in nearby galaxies for 0≲R≲2Reff. For Q0957+561, we find a 16% uncertainty in the galaxy mass and formal 2 σ limits on the Hubble constant of H0=61+13–15 km.s–1.Mpc–1. For PG 1115+080, we find that none of the viable lens models can be ruled out, so that H0 is not yet strongly constrained by this system.

Abstract Copyright:

Journal keyword(s): Cosmology: Distance Scale - Cosmology: Gravitational Lensing - quasars: individual (0957+561, PG 1115+080)

CDS comments: Galaxy Q0957+561 G1 = YGKOW G1, Galaxy PG 1115+080 G = [YDG81] G

Simbad objects: 8

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:1999ApJ...516...18R and select 'bookmark this link' or equivalent in the popup menu