STREAMING MOTIONS IN THE LOCAL UNIVERSE - EVIDENCE FOR LARGE-SCALE, LOW-AMPLITUDE DENSITY-FLUCTUATIONS

Using a new set of Tully-Fisher distances for northern spirals, we show that the previously detected motion of the Perseus-Pisces region toward the Local Group is not solely produced by the Great Attractor. Rather, a significant fraction of its motion may arise from a large-scale, parallel streaming flow that includes all galaxies within a sphere out to at least 6000 km s-1 in radius around the Local Group. This finding is supported by a new bulk flow analysis that uses more than 3000 galaxies. The magnitude of this flow, 360 +/- 40 km s-1, is consistent with COBE DELTAT/T fluctuations but inconsistent with present limits on DELTAT/T at 1-degrees scale and potentially conflicting with a recent measurement of bulk flow on much larger scales.