| Title | HI-observations of galaxies in the Pegasus I cluster. |
| Authors | Richter, O. G.; Huchtmeier, W. K. |
| Bibcode | 1982A&A...109..155R Search ADS ↗ |
| Abstract | Galaxy counts and 21 cm-H I observations of the field of the Pegasus I cluster are presented. With the help of these observations the Pegasus I cluster is easily separated from a different clustering in the background which is identified as part of the Perseus supercluster. Only about 75 galaxies can certainly be associated with Pegasus I. This small cluster has a relatively low central density and a remarkably small velocity dispersion of only 236 km/s. In contrast to results in rich clusters like Virgo and Coma, no H I deficiency has been observed for Pegasus I member galaxies. Together with the lack of evidence for intergalactic gas (no extended X-ray or radio emission is known in this cluster) this fits well the assumption that gas deficiency in spiral galaxies in rich clusters is caused by gas removal due to ram pressure of the motion of galaxies through the intracluster medium. |
| Objects | 91 Objects Search NED ↙ |
