Is GX 1+4 the compact 511 keV Galactic center source?

Details Is GX 1+4 the compact 511 keV Galactic center source? Is GX 1+4 the compact 511 keV Galactic center source?

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...346..143m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 346, Nov. 1, 1989, p. 143-150.

Astronomy and Astrophysics

Astronomy

24

Galactic Nuclei, Gamma Ray Astronomy, Milky Way Galaxy, Positron Annihilation, X Ray Binaries, Giant Stars, Light Curve, M Stars, Stellar Luminosity, Stellar Oscillations

Scientific paper

An intense 511 keV positron annihilation-line source was detected from the direction of the Galactic center throughout the 1970s. The source disappeared abruptly early in the 1980s. It remained in a low state through at least 1984 and reemerged sometime between 1984 and 1988. This 'on-off-on' light curve is mimicked by the X-ray light curve of the pulsating X-ray binary GX 1+4. The similar light curves of the two sources, coupled with their positional agreement and the unusual properties of GX 1+4, suggest that GX 1+4 is the Galactic center positron/511 keV source.

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