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Structural investigations in the central part of the coma cluster on the base of equidensity diagrams. II
Author(s) -
Richter N.,
Högner W.
Publication year - 1978
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.19782990302
Subject(s) - surface brightness , coma cluster , astrophysics , physics , galaxy , magnitude (astronomy) , base (topology) , brightness , surface (topology) , cluster (spacecraft) , coma (optics) , astronomy , galaxy cluster , geometry , mathematics , mathematical analysis , computer science , programming language
On the base of Tautenburg UBV ‐Schmidt plates equidensitometric diameters of galaxies of R OOD and B AUM 's list are given and the ellipticities in the three colours are determined. It was found that there is no difference in the ellipticities depending on the colours, on the average. The percentage of spherical objects (ε = 0.00) was found to 21.5 per cent. The surface brightness for 213 objects in the system V is given. The mean surface brightness is 22.75 mag/□′ with a dispersion of 2.5 mag/□′. It shows only a very slight dependence on the integrated magnitude.