Are nearby Small Groups of Galaxies Expanding with the Universe?
Open Access
- 1 October 1975
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 173 (1) , 41P-46P
- https://doi.org/10.1093/mnras/173.1.41p
Abstract
Turner and Sargent have argued that many of the small groups of galaxies catalogued by de Vaucouleurs have crossing-times of the order of the Hubble time, and hence are probably unbound systems expanding as the Universe expands. I show that they used an inappropriate definition of crossing-time, and that the properly defined crossing-times are typically about 20 per cent of the Hubble time.Keywords
This publication has 0 references indexed in Scilit: