The Hydra I cluster of galaxies. II - First results from H I observations

Details The Hydra I cluster of galaxies. II - First results from H I observations The Hydra I cluster of galaxies. II - First results from H I observations

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...125..187r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 125, no. 2, Sept. 1983, p. 187-192.

Astronomy and Astrophysics

Astronomy

20

Astronomical Spectroscopy, Centimeter Waves, Galactic Clusters, Radio Astronomy, Abundance, Hydrogen, Radial Velocity, Red Shift, Virgo Galactic Cluster

Scientific paper

H I 21-cm line observations of 42 galaxies in the field of the Hydra I (=Abell 1060) clusters are presented. 17 galaxies have been detected, raising the number of known redshifts in the area of the Hydra I cluster to 96. The authors find evidence for an increase of the H I-deficiency factor radially inwards to the centre of the cluster. The distance modulus of the Hydra I cluster relative to the Virgo cluster from the (blue magnitude) Tully-Fisher relation (2m.68±0m.21) is in agreement with other determinations and with the value based on the ratio of cluster redshifts (2m.61±0m.15). Thus a constraint to the infall velocity of the Local Group toward the Virgo cluster is given to values less than 350 km s-1.

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