Wall Structure with 6dF, a Multifiber spectrograph of UK Schmidt Telescope

英澳天文台于2001年6月开始用6 dF（一台连接在英国施密特望远镜上的多光纤摄谱仪）进行星系巡天。Wakamatsu是国际科学小组的成员之一，主要从事银河系面红移巡天的工作，这次巡天的目标与SDSS和2dF巡天不同，是基于2微米全天巡天2 MASS，我们选择了13万多个K波段亮度大于13等的星系。通过测量它们的红移，揭示了cz <30，000 km/s范围内的局域大尺度结构，初步结果如下：1）通过获得星系的三维分布，研究了局域宇宙的质量密度; 2）沿银道面沿着测量了许多隐藏星系的后退速度，这些速度在K波段清晰可见; 3）通过应用Dn-sigma关系，获得了足以估算星系团整体运动的光谱; 4）首次公布了数据，并想分析它们来研究偏置参数和宇宙学常数。

Anglo-Australian Observatory has started galaxy survey in June 2001 with 6dF, a multi-fiber spectrograph attached to the UK Schmidt telescope. Wakamatsu, a member of international science team, worked mostly for the redshift survey along the Galactic plane.Targets of this spectroscopic survey are, contrary to SDSS and 2dF surveys, based on 2MASS, the two-micron all sky survey, and we selected more than 130,000 galaxies which are brighter than 13 mag in K band. Measuring their redshifts, we discloses the Local Large-Scale Structure within the distance cz < 30,000 km/s.The preliminary results are as follows :1) We studied the mass density of the Local Universe by obtaining 3-dimensional distribution of galaxies.2) Along the Galactic plane, we succeeded in measuring recession velocities of many hidden galaxies which are clearly seen in the K-band.3) We obtained spectra good enough to estimate bulk motions of clusters by apply Dn-sigma relation.4) We have made the first data release, and would like analyze them for studies of the bias parameter and the cosmological constant.