The Hubble constant inferred from 18 time-delay lenses

Details The Hubble constant inferred from 18 time-delay lenses The Hubble constant inferred from 18 time-delay lenses

2010-02-12

arxiv.org/abs/1002.2570v1

Astrophys.J. 712 (2010) 1378-1384

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

11 page, 4 figures, Accepted for publication in ApJ

Scientific paper

10.1088/0004-637X/712/2/1378

We present a simultaneous analysis of 18 galaxy lenses with time delay measurements. For each lens we derive mass maps using pixelated simultaneous modeling with shared Hubble constant. We estimate the Hubble constant to be 66_{-4}^{+6} km/s/Mpc (for a flat Universe with \Omega_m=0.3, \Omega_\Lambda=0.7). We have also selected a subsample of five relatively isolated early type galaxies and by simultaneous modeling with an additional constraint on isothermality of their mass profiles we get H_0=76 +/-3 km/s/Mpc.

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