Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...181..217f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 181, no. 2, July 1987, p. 217-224.
Astronomy and Astrophysics
Astrophysics
4
Galactic Structure, Space Density, Surface Properties, Universe, Astronomical Maps, Histograms, Northern Sky, Pixels, Red Shift, Southern Sky
Scientific paper
In an attempt to catalogue all the nearby large structures of galaxies (Vr ≤ 10000 km s-1), the authors discuss maps of galaxian surface density for the whole sky, from CGCG, MCG and ESO catalogues. The resolution of the maps is 0°.5×0°.5 and each pixel is shaded with an intensity proportional to the galaxian surface density. In this way, regions crowded in galaxies are clearly seen. As a result, a dozen of large structures have been evidenced; several of them are well known (Perseus-Pisces, Coma-A 1367 superclusters for instance). However, three of them do not seem to have been previously recognized: they are located north of the Lynx-Ursa Major supercluster, South of the Perseus-Pisces supercluster and South of the Hydra cluster respectively. Two of the new structures have been found to be real ones (South Hydra and North Lynx); no firm conclusion has been drawn for the other one, due to lack of redshifts.
Balkowski Ch.
Chamaraux Pierre
Fontanelli P.
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