High-Sensitivity Radio

Proceedings of a meeting held at Jodrell Bank, January 22-26, 1996

Edited by N. Jackson R. J. Davis Jodrell Bank, Nuffield Laboratories, University of Manchester

CAMBRIDGE UNIVERSITY PRESS Contents

Participants xi Preface xv Foreword xvii Acknowledgements xviii

Planets, stars and pulsars Longitudinal asymmetry of Jupiter's radiation belts after the encounter with comet D/Shoemaker-Levy 9 Richard Strom, Imke de Pater and Floris van der Tak 2 Pulsars at the highest radio frequencies Richard Wielebinski 6 Present and future pulsar searches F. Camilo 14 The study of stellar radio emission with very large aperture radio telescopes E.R. Seaquist 23 High-resolution. MERLIN maps of the radio emission from Nova Cygni 1992 and Nova Cassiopeiae 1993 Stewart Eyres, Richard Davis, Mike Bode and Huw Lloyd 33 Orbital motion and a model for HM Sge H.T. Kenny, A.R. Taylor, S. Kwok, S.P.S. Eyres and R.J. Davis 37 Variable sources and jets in Cepheus A V.A. Hughes 42 A radio survey of southern X-ray binary stars R.E. Spencer, A.K. Tzioumis, L.R. Ball, 5.J. Newell and V. Migenes 46 MERLIN astrometry of radio stars S.T. Garrington, R.J. Davis, L.V. Morrison and R.W. Argyle 50 High-sensitivity radio observations of the 8.665-GHz 3He+ hyperfme line emission from planetary nebulae D.S. Balser, T.M. Bania, R.T. Rood and T.L. Wilson 53 High-resolution observations of young planetary nebulae M. Bryce, A. Pedlar, T. Muxlow, P. Thomasson, G. Mellema, J. Meaburn and I. Bains 57 Continuum and polarization mapping of diffuse Galactic radio sources J.R. Dickel v -••• ••••.- . . 61

High-sensitivity observations of circumstellar masers R.J. Cohen 65 Megamasers Willem Baan 73

vn viii Contents Weak radio spectral lines Hi and CO in the high-latitude cloud MBM7 Y.C. Minh 84 A large-scale, sensitive CO survey of the Mon OBI region Richard Oliver, M.R. W. Masheder and Patrick Thaddeus 88 Quest for the 3-cm spectral limit: high-sensitivity measurements of 3He+ emission from Galactic Hi I regions T.M. Bania, D.S. Balser, R.T. Rood and T.L. Wilson 93 High-reliability galactic Hi line observations P. Kalberla, D. Hartmann, U. Mebold and G. Westphalen 97 Radio Hi arid optical absorption-line studies of interstellar gas B. Bates, C.R. Shaw, S.N. Kemp, F.P. Keenan, R.D. Davies and R.S. Roger 101

Galaxies and High-resolution imaging of Hi in J.M. van der Hulst 106 Radio emission from galactic disks • Rainer Beck 117 Weak radio emission from active galactic nuclei Marek Kukula, J. S. Dunlop and A. Pedlar 129 High-sensitivity decimetre observations of Seyfert nuclei A. Pedlar, N.G. Hamilton and M. Kukula 139 Neutral hydrogen in Seyfert galaxies C.G. Mundell 143 SNR and ionized gas in M82 T.W.B. Muxlow, A. Pedlar, K.A. Wills, P.N. Wilkinson and D.J. Axon . . 149 Atomic hydrogen absorption in radio-loud sources John E. Conway 153 VLBI observations of low-power radio galaxies G. Giovannini, W.D. Cotton, L. Feretti, L. Lara and T. Venturi 157 5 GHz EVN polarization of 3C286 H.S. Sanghera, D.R. Jiang, D. Dallacasa, R.T. Schilizzi, E. Ludke and W. D. Cotton 161 Polarization imaging with MERLIN at K-band to resolve Faraday effects in CSS jets E. Lu'dke, H.S. Sanghera and W.D. Cotton 165 The cosmological evolution of radio sources James Dunlop 167 Determining the Hubble constant Michael Rowan-Robinson 177 Radio objects at redshifts 300>z>10 V.K. Dubrovich 189 Contents ix New-generation telescopes The Millimetre Array projects Roy S. Booth 194 Submillimetre-wave technology for extragalactic spectral-line astronomy Stafford Withington 203 Very deep continuum observations at submillimetre wavelengths E.I. Robson 207 Cold dust in galaxies at 1.2-mm wavelength R. Wielebinski ., 211 The Lovell Telescope upgrade R.J. Davis 213 The Giant Metrewave Radiotelescope G. Swarup. S. Ananthakrishnan, C. R. Subrahmanya, A. P. Rao, V. K. Kulkarni and V. K. Kapahi 217 Status and plans for the Effelsberg 100-m telescope W. Reich 225 Renovating the Nangay radio telescope: the FORT project W. van Driel, J. Pezzani and E. Gerard 229 High-sensitivity and high-dynamic-range observations with the WSRT A.G. de Bruyn 233 MERLIN Phase 3 R.J. Cohen 238 The VLA upgrade project R.A. Perley 242 A high-sensitivity second-generation space VLBI mission J.S. Ulvestad, L.I. Gurvits and R.P. Linfield 252 Giga-bit VLBI storage system for the next generation J. Nakajima, H. Kiuchi, Y. Chikada, M. Miyoshi, N. Kawaguchi, H. Kobayashi and Y. Murata 256 The concept of the square kilometre array interferometer Robert Braun 260 Alternative array configuration and antenna elements for the square kilometre array interferometer G. Swarup 269 A proposed large radio telescope of new design T.H. Legg 274 Further site survey for the next-generation large radio telescope in Guizhou B. Peng, R. N. An, Y. Qiu, Y. Nie, B. Zhu, X. Xu and R. Strom 278 Technical aspects of the square kilometre array interferometer A. van Ardenne and F. Smits 282 x Contents Argus: a next-generation omnidirectional radio telescope R.S. Dixon 287 Afterword Towards high sensitivity and high resolution R. Hanbury Brown 292

Author index 299 Object index 300 Subject index 302