Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-28T22:43:52.574Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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 

References

Bussard, R.W., Ramaty, R., Drachman, R.J., 1979, Ap. J , 228, 928 CrossRefGoogle Scholar
Crannell, C.J., Joyce, G., Ramaty, R., Werntz, C., 1976, Ap. J , 210, 582 CrossRefGoogle Scholar
Leventhal, M., MacCallum, C.J., Stang, P.D., 1978, Ap. J. Lett , 225, L11 Google Scholar
Leventhal, M., MacCallum, C.J., Huters, A.F., Stang, P.D., 1986, Ap. J , 302, 459 CrossRefGoogle Scholar
MacCallum, C.J., Leventhal, M., 1983, in Positron-electron pairs in Astrophysics , ed. Burns, M., Harding, A., Ramaty, R. (New York: AIP) p211 Google Scholar
McClintock, J.E., 1984, Ap. J , 282, 291 Google Scholar
Ramaty, R., Lingenfelter, R.E., 1987, in The Galactic Center , ed. Backer, D.C. (New York: AIP) p51 Google Scholar
Riegler, G.R., Ling, J.C., Mahony, W.A., Wheaton, W.A., Willet, J.B., Jacobson, A.S., 1981, Ap. J , 248, L13 CrossRefGoogle Scholar
Share, G.H., Chupp, E.L., Forrest, D.J., Rieger, E., 1983, in Positron-electron pairs in Astrophysics , ed. Burns, M., Harding, A., Ramaty, R. (New York: AIP) p15 Google Scholar
Share, G.H., Kinzer, R.L., Kurfess, J.D., Messina, D.C., Purcell, W.R., Chupp, E.L., Forrest, J., Reppin, C., 1988, Ap. J , 326, 717 Google Scholar
Signore, M., Vedrenne, G., 1988, Astron. Astrophys , 201, 379 Google Scholar