Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2012-02-17
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Scientific paper
We study the relative alignment of mass and light in a sample of 16 massive early-type galaxies at z=0.2-0.9 that act as strong gravitational lenses. The sample was identified from deep multiband images obtained as part of the Canada France Hawaii Legacy Survey (CFHTLS) as part of the Strong Lensing Legacy Survey (SL2S). Higher resolution follow-up imaging is available for a subset of 10 systems. We construct gravitational lens models and infer total enclosed mass, elongation, and position angle of the mass distribution. By comparison with the observed distribution of light we infer that there is a substantial amount of external shear $< \gamma_{\rm ext}> \approx 0.12$, arising most likely from the environment of the SL2S lenses. In a companion paper (Ruff et al. 2011) we combine these measurements with follow-up Keck spectroscopy to study the evolution of the stellar and dark matter content of early-type galaxies as a function of cosmic time.
Brault Florence
Gavazzi Raphael
Marshall Philip J.
Ruff Andrea
Treu Tommaso
No associations
LandOfFree
The SL2S Galaxy-scale Gravitational Lens Sample. I: The alignment of mass and light in massive early-type galaxies at z=0.2-0.9 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The SL2S Galaxy-scale Gravitational Lens Sample. I: The alignment of mass and light in massive early-type galaxies at z=0.2-0.9, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The SL2S Galaxy-scale Gravitational Lens Sample. I: The alignment of mass and light in massive early-type galaxies at z=0.2-0.9 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-35432