Galaxy formation and evolution

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Optical spectroscopy of two overlapping, flux-density-limited samples of radio sources in the North Ecliptic Cap, selected at 38 and 151 MHz

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 308:4 (1999) 1096-1116

Authors:

M Lacy, S Rawlings, GJ Hill, AJ Bunker, SE Ridgway, D Stern
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Proposed identification of Hubble Deep Field submillimeter source HDF 850.1

ASTRONOMY & ASTROPHYSICS 347:3 (1999) 809-820

Authors:

D Downes, R Neri, A Greve, S Guilloteau, F Casoli, D Hughes, D Lutz, KM Menten, DJ Wilner, P Andreani, F Bertoldi, CL Carilli, J Dunlop, R Genzel, F Gueth, RJ Ivison, RG Mann, Y Mellier, S Oliver, J Peacock, D Rigopoulou, M Rowan-Robinson, P Schilke, S Serjeant, LJ Tacconi, M Wright
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Prospects for chemical evolution studies in the infrared

ESO ASTROPHY SYMP (1999) 290-296

Authors:

N Thatte, R Genzel

Abstract:

Near infrared instrumentation at 4 and 8 meter class telescopes has grown rapidly in the past few years with the advent of 1024(2) and 2048(2) detector arrays. We present a brief review of high resolution spectroscopic capabilities available worldwide, with an eye on new developments, e.g. spatially resolved spectroscopy offered by integral field instruments.Observing at near-infrared wavelengths has its own quirks. We discuss observing strategies to get past the limits of high background (including both thermal background and background due to OH sky emission lines), Variations in atmospheric transmission, and detector constraints. Special attention is given to the subject of OH suppression/avoidance, which can significantly increase the sensitivity in the J, EI and short K windows. This is especially important for (fainter) high redshift targets, where the rest frame visible diagnostic lines are shifted into the near infrared.
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Searching for low-mass supermassive black holes

IAU SYMP (1999) 422-423

Authors:

M Cappellari, F Bertola, EM Corsini, JG Funes, A Pizzella, JCV Beltran
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Semi-analytic models and background hydrogen-ionizing flux

ESO ASTROPHY SYMP (1999) 301-302

Authors:

JEG Devriendt, B Guiderdoni, SK Sethi

Abstract:

We estimate the contribution of galaxies to the cosmic background flux at 912 Angstrom by means of an extended semi-analytic model of galaxy formation and evolution which takes into account the absorption of Lyman-limit photons by HI and dust in the interstellar medium (ISM) of the galaxies. We find that, though the background Lyman-limit flux escaping from galaxies is negligible compared to the flux from quasars at high redshifts, these two contributions become comparable at z similar or equal to 0.
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