Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...97..137m&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 97, no. 1, p. 137, 138.
Astronomy and Astrophysics
Astrophysics
2
Aluminum 26, Gamma Ray Astronomy, High Temperature Plasmas, Nuclear Astrophysics, Two Dimensional Models, Balloon-Borne Instruments, Galactic Structure, Spectral Emission, Telescopes, X Ray Astronomy
Scientific paper
Measuring the 1809 keV line flux with existing gamma-ray experiments requires 'a priori' knowledge of a source distribution. Most of the currently used Al-26 distributions are one-dimensional models for the galactic plane. Following a recent suggestion that the production sites of Al-26 could be traced by thermal X-rays from hot bubbles, we present a two-dimensional distribution model for the 1809 keV emission. This model takes into account the presence of a large foreground bubble ('Loop I') seen in soft X-rays and at radio wavelengths, in addition to the background galactic ridge. There are indications that the current differences with one-dimensional models may be resolved in this framework. Future observations by GRO, CRIS, and HIREGS with appropriate ON/OFF strategies can test the proposed distribution model.
Malet I.
Montmerle Th.
von Ballmoos Peter.
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