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A Search for Radio Recombination Lines of Positronium Near the Galactic Center

Published online by Cambridge University Press:  23 September 2016

K. R. Anantharamaiah ,
V. Radhakrishnan ,
D. Morris ,
M. Vivekanand ,
D. Downes  and
C. S. Shukre
K. R. Anantharamaiah
Affiliation:
RAO-VLA, RO. Box O Socorro, NM 87801, USA
V. Radhakrishnan
Affiliation:
Raman Research Institute Bangalore 560 080, India
D. Morris
Affiliation:
Institut de Radio Astronomie Millimetrique Domaine Universitaire 38406 St. Martin d'Heres, France
M. Vivekanand
Affiliation:
Institut de Radio Astronomie Millimetrique Domaine Universitaire 38406 St. Martin d'Heres, France
D. Downes
Affiliation:
Institut de Radio Astronomie Millimetrique Domaine Universitaire 38406 St. Martin d'Heres, France
C. S. Shukre
Affiliation:
Raman Research Institute Bangalore 560 080, India

Abstract

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Several attempts were made to detect the possible radio recombination lines of positronium near the galactic center. An absorption feature seen at λ6cm, in the D-configuration of the VLA was not confirmed by subsequent observations at λ6cm and λ20cm using the B and C configurations of the VLA. An observation at λ3mm using the IRAM 30m telescope also did not detect any line. On the basis of one recombination line photon for every positron (McClintock 1984), our non-detections imply an upper limit to the positron production rate of < 3.1 × 1043 s−1, within about 2″ of the galactic center.

Type
The High - Energy View
Information
Symposium - International Astronomical Union , Volume 136: The Galactic Center , 1989 , pp. 607 - 616
Copyright
Copyright © Kluwer 1989 

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