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Search for Radio Recombination Lines towards the Gravitational Lens PKS1830-211

Published online by Cambridge University Press:  26 May 2016

N.R. Mohan ,
K.R. Anantharamaiah  and
W.M. Goss
N.R. Mohan
Affiliation:
1 Raman Research Institute, Bangalore 560080, India 2 Indian Institute of Science, Bangalore 560012, India
K.R. Anantharamaiah
Affiliation:
1 Raman Research Institute, Bangalore 560080, India
W.M. Goss
Affiliation:
3 NRAO, Socorro, NM 87801, USA

Abstract

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A search for radio recombination lines near 20 cm at z=0.193 and z=0.886 towards the gravitational lens system PKS1830-211 has yielded upper limits of |τL| ≤ 5 × 10−5 and ≤ 5 × 10−4 at the two redshifts respectively. Based on the non-detections, we derive upper limits to the emission measure of the ionized gas in the absorbing systems. We also present continuum flux density measurements over the frequency range 0.3—45 GHz made at a single epoch.

Type
Part 2: Extra Galactic Neutral Hydrogen and Cosmology
Information
Symposium - International Astronomical Union , Volume 199: The Universe at Low Radio Frequencies , 2002 , pp. 116 - 117
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

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