Distances to five nearby southern galaxy clusters and the absolute motion of the Local Group
Creators
- 1. Durham Univ. (UK). Dept. of Physics
- 2. Australian National Univ., Canberra. Inst. of Advanced Studies
- 3. Royal Greenwich Observatory, Santa Cruz de La Palma, Tenerife, Islas Canarias (Spain). Observatorio de Roque de los Muchachos
Description
We present redshifts and central velocity dispersions derived from observations with the AATs fibre system for galaxies in five nearby southern clusters, Abell 194 (0122-02), Hydra (Abell 1060, 1034-27), Centaurus (1246-41), Pavo II (1842-63) and Klemola 44 (2345-28). Relative distances to these galaxy clusters are derived via the application of the D-σ relation to the early-type galaxies. For the Centaurus cluster we find that the two velocity components (Cen30 and Cen45) lie at the same distance and thus the large peculiar velocity of Cen45 is naturally explained by its infall towards the more massive Cen30 component. We find that the rich clusters in our sample have peculiar velocities with respect to the cosmic microwave background (CMB) that are not significantly different from zero. (author)
Additional details
Publishing Information
- Journal Title
- Monthly Notices of the Royal Astronomical Society
- Journal Volume
- 235
- Journal Issue
- 4
- Series
- Mon. Not. R. Astron. Soc.
- Journal Page Range
- 1177-1201
- ISSN
- 0035-8711
- CODEN
- MNRAA
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 20028062
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- COORDINATES; DISTANCE; EXPERIMENTAL DATA; GALAXIES; GALAXY CLUSTERS; PHOTOMETRY; PROPER MOTION; RADIAL VELOCITY; RED SHIFT; RELICT RADIATION; VISIBLE SPECTRA
- Descriptors DEC
- DATA; ELECTROMAGNETIC RADIATION; INFORMATION; MICROWAVE RADIATION; MOTION; NUMERICAL DATA; RADIATIONS; SPECTRA; VELOCITY