The large-scale distribution of IRAS galaxies and the predicted peculiar velocity field
The large-scale distribution of IRAS galaxies and the predicted peculiar velocity field
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IRAS星系的大尺度分布及奇特速度场的预测
DOI：
10.1093/mnras/252.1.1
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发表时间：
1991
影响因子：
4.8
通讯作者：
W. Saunders
中科院分区：
文献类型：
--
作者：
N. Kaiser;G. Efstathiou;R. Ellis;C. Frenk;A. Lawrence;M. Rowan‐Robinson;W. Saunders
利用QDOT IRAS星系红移巡天，构建了一个平滑的密度场，修正了局部宇宙区域的特殊速度畸变，达到~ 150 h−1 Mpc。假设重力不稳定理论，从密度场计算出预测的奇异速度，并与由Tully-Fisher和D n - σ技术得出的观测速度进行比较。两者之间存在很好的相关性。如果IRAS星系在大尺度上追踪质量，那么宇宙的密度必须非常接近临界值。
Using the QDOT IRAS galaxy redshift survey, a smoothed density field is constructed, corrected for peculiar velocity distortion, of a region of the local universe out to ∼ 150 h −1 Mpc. Predicted peculiar velocities are calculated from this density field, assuming gravitational instability theory, and compared to observed velocities derived from Tully-Fisher and D n −σ techniques. A good correlation is seen. If IRAS galaxies trace the mass on large scales then the universe must have a density very close to the critical value.