J/A+A/336/35 J/A+A/336/35 Shape and orientation of superclusters J Jaaniste E Tago M Einasto J Einasto H Andernach V Mueller Astron. Astrophys. 336 35 1998 1998A&A...336...35J J/A+AS/123/119 : The supercluster-void network. I. (Einasto+ 1997) Einasto, M., Tago, E., Jaaniste, J., Einasto, J., Andernach, H., 1997A&AS..123..119E (Paper I) Einasto, M., Frisch, P., Gottloeber, S., Mueller, V., Saar, V., Starobinsky, A.A., Tago, E., Tucker, D., Andernach, H., 1997MNRAS.289..801E (Paper II) Einasto, M., Frisch, P., Gottloeber, S., Mueller, V., Saar, V., Starobinsky, A.A., Tucker, D., 1997MNRAS.289..813E (Paper III) Clusters, galaxy cosmology: observations galaxies: clusters: general large-scale structure of universe We present a study of the shape, size, and spatial orientation of superclusters of galaxies. Approximating superclusters by triaxial ellipsoids we show that superclusters are flattened, triaxial objects. We find that there are no spherical superclusters. The sizes of superclusters grow with their richness: the median semi-major axis of rich and poor superclusters (having >=8 and <8 member clusters) is 42 and 31h^-1^Mpc, respectively. Similarly, the median semi-minor axis is 12 and 5h^-1^Mpc for rich and poor superclusters. The spatial orientation of superclusters, as determined from the axes of the ellipsoids, is nearly random. We do not detect any preferable orientation of superclusters, neither with respect to the line of sight, nor relative to some other outstanding feature in the large scale structure, nor with respect to the directions of principal axes of adjacent superclusters.

SCL Supercluster number, as in Cat. J/A+AS/123/119 --- nCl Number of clusters in supercluster --- a First semiaxis of concentration ellipsoid Mpc b Second semiaxis of concentration ellipsoid Mpc c Third semiaxis of concentration ellipsoid Mpc V/Vsph Ratio of ellipsoid to sphere volumes (bc/a^2^) --- Xa Angle of a-axis with the supergalactic X-axis deg Xc Angle of c-axis with the supergalactic X-axis deg Ra Angle of a-axis with the line of sight deg Rc Angle of c-axis with the line of sight deg RAdeg Right ascension (1950) of supercluster centre position taken from Cat. J/A+AS/123/119 deg DEdeg Declination (1950) of supercluster centre deg Heinz Andernach Univ. Guanajuato Francois Ochsenbein CDS 1999Jul21 UNKNOWN UNKNOWN * 21-Jul-1999: received from Heinz Andernach (heinz@astro.ugto.mx) who prepared the table from the latex manuscript (astro-ph/9807044). Equatorial coordinates were added to this table at CDS. J_A+A_336_35.xml