Orbital modulation and longer term variability in the radio emission from Cygnus␣X‐1
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 302:1 (1999) l1-l5
A large-scale bulk flow of galaxy clusters
ASTROPHYSICAL JOURNAL 512:2 (1999) L79-L82
Galactic bulges from Hubble Space Telescope NICMOS observations:: ages and dust
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 310:3 (1999) 703-716
No evidence for a 'redshift cut-off' for the most powerful classical double radio sources
ASTR SOC P 193 (1999) 90-93
Abstract:
We use three samples (3CRR, 6CE and 6C*) to investigate the radio luminosity function (RLF) for the 'most powerful' low-frequency selected radio sources. We find that the data are well fitted by a model with a constant ca-moving space density at high redshift as well as by one with a declining co-moving space density above some particular redshift. This behaviour is very similar to that inferred for steep-spectrum radio quasars by Willott et al (1998) in Line with the expectations of Unified Schemes. We conclude that there is as yet no evidence for a 'redshift cutoff' in the co-moving space densities of powerful classical double radio sources, and rule out a art-off at z less than or similar to 2.5.The peculiar motions of early-type galaxies in two distant regions -: V.: The Mg-σ relation, age and metallicity
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 303:4 (1999) 813-825