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Multi-wavelength probes of distant lensed galaxies

Published online by Cambridge University Press:  17 August 2012

Stephen Serjeant
Stephen Serjeant*
Affiliation:
Dept. of Physical Sciences, The Open University, Milton Keynes, MK7 6AA, UK email: [email protected]
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Abstract

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I summarise recent results on multi-wavelength properties of distant lensed galaxies, with a particular focus on Herschel. Submm surveys have already resulted in a breakthrough discovery of an extremely efficient selection technique for strong gravitational lenses. Benefitting from the gravitational magnification boost, blind mm-wave redshifts have been demonstrated on IRAM, SMA and GBT, and follow-up emission line detections have been made of water, [Oiii], [Cii] and other species, revealing the PDR/XDR/CRDR conditions. I also discuss HST imaging of submm lenses, lensed galaxy reconstruction, the prospects for ALMA and e-Merlin and the effects of differential magnification. Many emission line diagnostics are relatively unaffected by differential magnification, but SED-based estimates of bolometric fractions in lensed infrared galaxies are so unreliable as to be useless, unless a lens mass model is available to correct for differential amplification.

Keywords

gravitational lensingsurveysgalaxies: activegalaxies: high-redshiftgalaxies: ISMgalaxies: starburstcosmology: dark matterinfrared: galaxiesradio continuum: galaxiessubmillimeter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 475 - 481
Copyright
Copyright © International Astronomical Union 2012

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