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 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.
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机译:我们采用Schwarzschild的轨道建模方法来约束Q0957 + 561和PG 1115 + 080中的中央透镜星系的质量剖面。我们将这些星系的测得的,中心投影的恒星速度色散与均方根速度和在0 R 2Reff附近星系中观测到的高斯-赫尔米特矩h4的自相似径向分布相结合。对于Q0957 + 561,我们发现星系质量不确定性为16%,并且H0 = 61 km s-1 Mpc-1的哈勃常数形式为2σ极限。对于PG 1115 + 080,我们发现无法排除所有可行的镜头型号,因此H0尚未受到该系统的强烈限制。
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