标题： 从红序星系团调查中的引力透镜结果 显示英文标题

标题： Lensing results from the Red-sequence Cluster Survey

摘要： 我们展示了基于红序列星系巡天（RCS）R_C波段成像数据的持续分析的各种弱引力透镜结果。我们简要讨论了由中间大尺度结构（宇宙剪切）引起的弱引力透镜信号，并使用参数化质量模型研究了19.5<R_C<21的星系（其平均红移为z=0.35）周围暗物质晕的特性。这使我们首次能够限制这些晕的范围。我们发现截断参数s<470 h^{-1} kpc的稳健上限（99.7%置信度）。我们还研究了这些星系在不同尺度上的偏置特性。我们发现偏置参数b和星系-质量交叉相关系数r随尺度变化（在0.1-6 h^{-1} Mpc尺度上）。有趣的是，我们在~0.5 h^{-1} Mpc尺度上发现r=0.57^{+0.08}_{-0.07}。 显示英文摘要

摘要： We present a variety of weak lensing results based on the ongoing analysis of R_C-band imaging data from the Red-Sequence Cluster Survey (RCS). We briefly discuss the weak lensing signal induced by intervening large scale structure (cosmic shear), and study the properties of the dark matter halos surrounding galaxies with 19.5<R_C<21 (which have a median redshift of z=0.35) using a parametrized mass model for the galaxy mass distribution. This allows us for the first time to constrain the extent of the halos. We find a robust upper limit for the truncation parameter s<470 h^{-1} kpc (99.7% confidence). We also study the biasing properties of these galaxies as a function of scale. We find that both the bias parameter b and the galaxy-mass cross-correlation coefficient r vary with scale (on scales 0.1-6 h^{-1} Mpc). Interestingly, we find that r=0.57^{+0.08}_{-0.07} on scales ~0.5 h^{-1} Mpc.