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MERLIN observations of relativistic ejections from GRS 1915+105

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 304:4 (1999) 865-876

Authors:

RP Fender, ST Garrington, DJ McKay, TWB Muxlow, GG Pooley, RE Spencer, AM Stirling, EB Waltman
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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

Authors:

GG Pooley, RP Fender, C Brocksopp
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Completeness and confusion in the identification of Lyman-break galaxies

HY-REDSHIFT UNIVERSE: GALAXY FORMATION AND EVOLUTION AT HIGH REDSHIFT 193 (1999) 513-516

Authors:

G Cotter, T Haynes, JC Baker, ME Jones, R Saunders
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No evidence for a 'redshift cut-off' for the most powerful classical double radio sources

ASTR SOC P 193 (1999) 90-93

Authors:

MJ Jarvis, S Rawlings, CJ Willott, KM Blundell, S Eales, M Lacy

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.
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MERLIN observations of superluminal motions in GRS 1915+105

Astrophysical Letters and Communications 38:1-6 (1998) 229-232

Authors:

RP Fender, ST Garrington, DJ McKay, TWB Muxlow, GG Pooley, RE Spencer, AM Stirling, EB Waltman

Abstract:

We present a brief discussion of high resolution observations of relativistic ejections from GRS 1915+103 with MERLIN. We have imaged superluminal motions in the inner 300 milliarcsec of several ejections from the system, with significantly higher proper motions than previously observed on arcsecond scales with the VLA. Under standard assumptions of an intrinsically symmetric jet, we derive a velocity for the ejecta which is higher then the previously accepted value of 0.92c, although the angle to the line of sight is comparable. © 1999 OPA (Overseas Publishers Association) N.V Published by license under the Gordon and Breach Science Publishers imprint.