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- W1978123945 abstract "Spectroscopic observations of galaxies in the Abell 1795 field have been obtained using the MX multiple-object spectrograph on the Steward Observatory 2.3 m telescope. Redshifts are presented for 46 galaxies, including 41 cluster members. We find that the A1795 cD galaxy is not at rest in the cluster gravitational potential well; it has a peculiar radial velocity, cz, of 365 km s^-1^, and the hypothesis that the mean cluster velocity is as large as the cD's velocity can be rejected at the 99.5% confidence level. This conclusion is supported by spectroscopic data for the cooling flow gas found in the central region of the cluster; this gas, except for the portion coincident with the cD nucleus, lies at the velocity we derive for the cluster mean. We suggest that current models of the formation of cD galaxies are unlikely to account for the large peculiar velocities of the cD galaxies in A1795 and A2670 unless substantial subclustering is still present. However, the available data show no evidence for velocity subclustering in either A1795 or A2670." @default.
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- W1978123945 date "1988-09-01" @default.
- W1978123945 modified "2023-10-16" @default.
- W1978123945 title "Peculiar velocities of cD galaxies - MX spectroscopy of Abell 1795" @default.
- W1978123945 doi "https://doi.org/10.1086/185258" @default.
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