Pulsars, transients and relativistic astrophysics

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Deep optical imaging of the field of PC 1643+4631A&B - I. Spatial distributions and the counts of faint galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 334:2 (2002) 262-282

Authors:

T Haynes, G Cotter, JC Baker, S Eales, ME Jones, S Rawlings, R Saunders
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Deflection of jets induced by jet-cloud interactions

ASTR SOC P 250 (2002) 462-466

Authors:

S Mendoza, MS Longair

Abstract:

Non-relativistic and relativistic models in which astrophysical jets are deflected on passing through an isothermal high density region are analysed. The criteria for the stability of jets to be affected by the formation of internal shocks are discussed.
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Detecting the Progenitors of Core Collapse Supernovae

Chapter in The Evolution of Galaxies, Springer Nature (2002) 187-190
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Detection of a cosmic microwave background decrement towards a cluster of mJy radio sources

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 331:1 (2002) 1-6

Authors:

G Cotter, HJ Buttery, S Rawlings, S Croft, GJ Hill, P Gay, R Das, N Drory, K Grainge, WF Grainger, ME Jones, GG Pooley, R Saunders
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Double-double radio galaxies: probing duty cycles in AGN and the cocoons of powerful radio sources

ASTR SOC P 250 (2002) 408-411

Abstract:

Recently, we have identified a small number of extended radio sources that consist of two double-lobed radio sources, which axe well aligned and centered on a common nucleus. We have called these 'Double-double radio galaxies' (DDRGs). The observed structures strongly suggest interrupted central activity as the origin of these sources. We have developed a model based on this assumption with which we are able to explain several observed properties. Since the inner structures of the DDRGs advance inside the cocoon originally formed by the outer lobes, these allow us to probe the cocoon medium. Our results indicate that the cocoon density must be higher than has been assumed in earlier models.
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