Comparative Studies of Line and Continuum Positron Annihilation Radiation

Details Comparative Studies of Line and Continuum Positron Annihilation Radiation Comparative Studies of Line and Continuum Positron Annihilation Radiation

2001-06-08

arxiv.org/abs/astro-ph/0106157v1

Astronomy and Astrophysics

Astrophysics

5 pages, to appear in the proceedings of the Gamma 2001 Symposium (Baltimore, April 2001)

Scientific paper

10.1063/1.1419363

Positron annihilation radiation from the Galaxy has been observed by the OSSE, SMM and TGRS instruments. Improved spectral modeling of OSSE observations has allowed studies of the distribution of both positron annihilation radiation components, the narrow line emission at 511 keV and the positronium continuum emission. The results derived for each individual annihilation component are then compared with each other. These comparisons reveal approximate agreement between the distribution of these two emissions. In certain regions of the sky (notably in the vicinity of the previously reported positive latitude enhancement), the distribution of the emissions differ. We discuss these differences and the methods currently being employed to understand whether the differences are physical or a systematic error in the present analysis.

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