A double-sided radio jet from the compact Galactic Centre annihilator 1E140.7 - 2942

Details A double-sided radio jet from the compact Galactic Centre annihilator 1E140.7 - 2942 A double-sided radio jet from the compact Galactic Centre annihilator 1E140.7 - 2942

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.358..215m&link_type=abstract

Nature (ISSN 0028-0836), vol. 358, no. 6383, July 16, 1992, p. 215-217.

Astronomy and Astrophysics

Astronomy

281

Galactic Nuclei, Milky Way Galaxy, Positron Annihilation, Radio Jets (Astronomy), Very Large Array (Vla), X Ray Sources, X Ray Telescopes

Scientific paper

The hard X-ray source 1E1740.7 - 2942 has been observed using the VLA, and its radio structure is found to be that of a double-sided jet emanating from a compact and variable core. Changes in the flux density and spectral index of the core are correlated with variations in the hard X-ray output. The jets are symmetrical about the core and end in edge-brightened radio lobes which are probably a result of synchrotron emission of electrons and positrons from the compact core. The observation suggest that 1E1740.7 - 2942 is a 'microquasar' stellar remnant near the Galactic Center which ejects positrons that travel more than a parsec before slowing and annihilating in the interstellar gas.

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