Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...412l..51c&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 412, no. 2, p. L51-L54.
Astronomy and Astrophysics
Astronomy
86
Density Distribution, Local Group (Astronomy), Spiral Galaxies, Universe, Northern Sky, Sky Surveys (Astronomy), Velocity Distribution
Scientific paper
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 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, is consistent with COBE Delta T/T fluctuations but inconsistent with present limits on Delta T/T at 1 deg scale and potentially conflicting with a recent measurement of bulk flow on much larger scales.
Courteau Stephane
Dressler Alan
Faber Sandra M.
Willick Jeffrey A.
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