This is an account of Allan Sandage’s work on (1) The character of the expansion field. For many years he has been the strongest defender of an expanding Universe. He later explained the CMB dipole by a local velocity of 220±50 km s−1 toward the Virgo cluster and by a bulk motion of the Local supercluster (extending out to ∼3500 km s−1) of 450–500 km s−1 toward an apex at l=275, b=12. Allowing for these streaming velocities he found linear expansion to hold down to local scales (∼300 km s−1). (2) The calibration of the Hubble constant. Probing different methods he finally adopted—from Cepheid-calibrated SNe Ia and from independent RR Lyr-calibrated TRGBs—H 0=62.3±1.3±5.0 km s−1 Mpc−1.
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机译：这是Allan Sandage在（1）扩展字段特征上所做的工作的描述。多年来，他一直是不断扩展的宇宙的最强捍卫者。后来他通过向处女座星团的局部速度为220±50 km s -1 以及局部超群的整体运动（扩展到3500 km s - 1 ）在l = 275，b = 12时朝顶点450-500 km s -1 。考虑到这些流速度，他发现线性膨胀可以保持在局部范围内（约300 km s -1 ）。 （2）哈勃常数的校准。他最终探索了不同的方法，从造父变星校准的SNe Ia和独立的RR Lyr校准的TRGBs，选择了H 0 = 62.3±1.3±5.0 km s -1 Mpc < sup> -1 。
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