Abstract
Abstract
We have built a new model for the lens system SDSS J1004+4112 including the recently measured time delay of the fourth quasar image. This time delay has a strong influence on the inner mass distribution of the lensing cluster (ρ ∝ r
−α
) allowing us to determine
α
=
1.18
−
0.03
(
−
0.18
)
+
0.02
(
+
0.11
)
at the 68% (95%) confidence level in agreement with hydrodynamical simulations of massive galaxy clusters. We find an offset between the brightest cluster galaxy and the dark matter halo of
3.8
−
0.7
(
−
1.3
)
+
0.6
(
+
1.4
)
kpc at 68% (95%) confidence which is compatible with other galaxy cluster measurements. As an observational challenge, the estimated time delay between the leading image C and the faint (I = 24.7) fifth image E is roughly 8 yr.
Funder
MEC ∣ Spanish National Plan for Scientific and Technical Research and Innovation
Publisher
American Astronomical Society
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
11 articles.
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