Neutral hydrogen observations of galaxies in superclusters

Astronomy and Astrophysics – Astronomy

Scientific paper

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Galactic Clusters, Hydrogen, Neutral Gases, Spiral Galaxies, Northern Sky, Radio Astronomy, Red Shift, Southern Sky, Spatial Distribution, Visual Observation

Scientific paper

Neutral hydrogen observations of spiral galaxies in the Uppsala General Catalog were made with the 91 m telescope in Green Bank. Results of the H I observations are presented for 309 objects north of declination +38 deg in the right ascension range between 10 h and 22 h and for a sample of 46 objects just south of the equator in the region around R.A. between 0 h and 3 h. Many of these objects are outlying members of superclusters and may be useful in the study of deviations from Hubble flow on supercluster scales. Velocity widths as measured by five different algorithms are presented along with a profile quality index.

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