论文标题
镜头群集SDSS J1004+4112的质量模型：第三次延迟的约束
A Mass Model for the Lensing Cluster SDSS J1004+4112: Constraints From the Third Time Delay
论文作者
论文摘要
我们已经为镜头系统SDSS J1004+4112建立了一个新型号，其中包括最近测量的第四种类星体图像的时间延迟。 This time delay has a strong influence on the inner mass distribution of the lensing cluster ($ρ\propto r^{-α}$) allowing us to determine $α=1.18^{+0.02(+0.11)}_{-0.03(-0.18)}$ at the 68% (95%) confidence level in agreement with hydrodynamical simulations of massive galaxy clusters.我们发现最明亮的集群星系（BCG）和暗物质光环$ 3.8^{+0.6（+1.4）} _ { - 0.7（-1.3）} $ KPC的68％（95％）信心，与其他星系群集测量兼容。作为观察性挑战，领先图像C和微弱（i = 24.7）第五图像E之间的估计时间延迟大约为8年。
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 ($ρ\propto r^{-α}$) allowing us to determine $α=1.18^{+0.02(+0.11)}_{-0.03(-0.18)}$ at the 68% (95%) confidence level in agreement with hydrodynamical simulations of massive galaxy clusters. We find an offset between the brightest cluster galaxy (BCG) and the dark matter halo of $3.8^{+0.6(+1.4)}_{-0.7(-1.3)}$ 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.
