Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107.1629t&link_type=abstract
The Astronomical Journal, vol. 107, no. 5, p. 1629-1636
Astronomy and Astrophysics
Astronomy
5
Astronomical Catalogs, Astronomy, Galactic Clusters, Galactic Structure, Hercules Nova, Red Shift, Astronomical Coordinates, Hubble Diagram, Nomographs, Statistical Distributions, Velocity
Scientific paper
216 redshifts have been obtained in a region of 981 sq deg south of the Hercules supercluster. 172 of these redshifts are of galaxies with mpg less than or equal to 15.1, 110 of which had no previous velocity measurement. 44 new redshifts are of galaxies fainter than mpg = 15.1. With these new data we have been able to define a sample in a vast region (approximately 1700 sq deg) around Hercules limited to mpg less than or equal to 15.1 with a velocity completeness of 81.5%. 189 galaxies have been morphologically classified so that all galaxies in the sample with known velocity now also have known morphology. The magnitude limited sample, including 556 galaxies, is then used to identify and describe galaxy structures in the region. We find that the overdense volume is small, that its overall appearance is that of a coral branch floating in a sea of nothing and that early and late type galaxies defined different structures.
Garilli Bianca
Maccagni Dario
Tarenghi Massimo
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