Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...138...85f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 138, no. 1, Sept. 1984, p. 85-92. Research supported by Cornell University.
Astronomy and Astrophysics
Astronomy
33
Density Distribution, Filaments, Galactic Clusters, Radio Sources (Astronomy), Centimeter Waves, Histograms, Radial Velocity, Red Shift
Scientific paper
In the Coma/A 1367 supercluster the surface distribution of galaxies from Zwicky and UGC catalogs outlines a filamentary structure in which the Coma cluster itself is embedded. In its densest part the filament extends for approximately 3.5 h in right ascension and shows an average density contrast of about 2.7 with respect to the nearby regions. The position angle of Coma is well oriented along the filament and points significantly toward another cluster of the filament which also shows an elongated shape in the same direction. A sample of new 21-cm redshifts is used together with the redshifts data available in the literature to study the structure of the filament: the majority of the galaxies on it falls in the velocity range of Coma indicating that the filament is a coherent structure in the three-dimensional space and represents an important element of the supercluster. The possibility that the filamentary structure continues at a lower density contrast to bridge the Lynx-Ursa Major and the Hercules supercluster is discussed.
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