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|Arcsecond Positions of UGC Galaxies|
We present accurate B1950 and J2000 positions for all confirmed galaxiesin the Uppsala General Catalog (UGC). The positions were measuredvisually from Digitized Sky Survey images with rms uncertaintiesσ<=[(1.2")2+(θ/100)2]1/2,where θ is the major-axis diameter. We compared each galaxymeasured with the original UGC description to ensure high reliability.The full position list is available in the electronic version only.
|Galaxy structures in the Hercules region|
216 redshifts have been obtained in a region of 981 sq deg south of theHercules supercluster. 172 of these redshifts are of galaxies withmpg less than or equal to 15.1, 110 of which had no previousvelocity measurement. 44 new redshifts are of galaxies fainter thanmpg = 15.1. With these new data we have been able to define asample in a vast region (approximately 1700 sq deg) around Herculeslimited to mpg less than or equal to 15.1 with a velocitycompleteness of 81.5%. 189 galaxies have been morphologically classifiedso that all galaxies in the sample with known velocity now also haveknown 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 appearanceis that of a coral branch floating in a sea of nothing and that earlyand late type galaxies defined different structures.
|The distance to the Hercules supercluster. I - Basic data for 220 galaxies in CGCG field 108.|
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1986ApJS...62..255B&db_key=AST
|Interacting galaxies in the Hercules supercluster of galaxies. I - Ring galaxies|
Four ring galaxies and two candidates have been discovered in theHercules supercluster of galaxies by applying the photographiccontrast-enhancement technique to deep IIIa-J or IIIa-F Schmidt plates.They appear to belong either to cluster halos or to a field population.IC 1194 has been found to have the largest linear diameter (about 133kpc: on the scale of H0 = 55 km/s Mpc) and the brightest magnitude, M(V)= -22.2. It shows no patchy structure on its ring, and hence noprominent H II regions. This is probably an SO-ring galaxy, i.e., a ringgalaxy whose progenitor might have been a gas-free SO galaxy. Dresslerno. 36 of the Abell 2151 cluster has six bright knots which aresurrounded by a faint diffuse ring.
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