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The first galaxies at cm and mm wavelengths

Published online by Cambridge University Press:  01 August 2006

Fabian Walter
Affiliation:
Max Planck Insitut für Astronomie, Heidelberg, Germany
Chris L. Carilli
Affiliation:
National Radio Astronomy Observatory, USA.
Frank Bertoldi
Affiliation:
Bonn University, Germany
Pierre Cox
Affiliation:
IRAM, France.
Karl M. Menten
Affiliation:
Max Planck Insitut für Radioastronomie, Bonn, Germany
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Abstract

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Observations of the most distant (z≃6) QSOs in the centimetre and millimetre regime currently serve as the only direct probe of the host galaxies of these extreme systems in the Epoch of Re-ionization. Such observations reveal that about 1'3 of the hosts contain massive reservoirs of dust (>108M) and molecular gas (>1010M) – the fuel for galaxy formation, and also indicate coeval starbursts at a rate >103Myr−1 adequate to form a large elliptical galaxy in a dynamical timescale. These data imply that a highly metal enriched, molecular ISM, can be generated in galaxies within 870 Myr of the Big Bang. High-resolution imaging of the gas also provide an estimate of the host galaxy dynamical mass. However, current observations are restricted to rare, hyper-luminous IR galaxies. I will close by considering the prospects of observing the gas, dust, and star formation in the first ‘normal’ galaxies (e.g., the Ly-α galaxies) into cosmic reionization (z>6), using ALMA and the EVLA.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

References

Maiolino, R., Cox, P., Caselli, P., et al. 2005, A&A (Letters), 440, L51Google Scholar
Walter, F., Bertoldi, F., Carilli, C. L., et al. 2003, Nature, 424, 406CrossRefGoogle Scholar
Walter, F., Carilli, C. L., Bertoldi, F., et al. 2004, ApJ (Letters), 615, L17CrossRefGoogle Scholar
Walter, F., et al. 2006, GCN Circular 5300Google Scholar
Wang, R., Carilli, C. L., Beelen, A., et al. 2007, AJ, 134, 617CrossRefGoogle Scholar
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The first galaxies at cm and mm wavelengths
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