Galactic center positronium fraction - Observations and simulations

Details Galactic center positronium fraction - Observations and simulations Galactic center positronium fraction - Observations and simulations

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...319..637b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 319, Aug. 15, 1987, p. 637-642.

Statistics

Computation

42

Astronomical Spectroscopy, Computational Astrophysics, Galactic Nuclei, Gamma Rays, Milky Way Galaxy, Positron Annihilation, Cosmic Dust, Fractions, Neutral Gases, Positronium

Scientific paper

Recent papers discussing positron annihilation data from the Galactic center have used several incompatible definitions of "the positronium fraction". These differences are sorted out and the observations presented in a consistent manner. The authors find that the apparent positronium (Ps) fraction measured could indicate the presence of Ps at a level consistent with a model for a neutral medium, derived from laboratory experiments, and other models such as an ionized medium or one where dust plays a major role.

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