Assessment of Tracers of 1.8 MeV Emission

Details Assessment of Tracers of 1.8 MeV Emission Assessment of Tracers of 1.8 MeV Emission

1999-02-19

arxiv.org/abs/astro-ph/9902282v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, Proc. of the 3rd INTEGRAL workshop, Taormina

Scientific paper

We examined the question of a possible correlation between 1.8 MeV emission and intensity distributions observed at other wavelengths by comparing the 1.8 MeV data to an extended set of all-sky maps, covering the entire explored wavelength range from the radio band up to high-energy gamma-rays. This analysis revealed that tracers of the old stellar population or the local interstellar medium provide only a poor description of the data. Tracers of the young stellar population considerably improve the fit. Residuals are minimized for the free-free emission map obtained by the DMR at microwave wavelengths and the 158 um fine-structure line map of C+ observed by FIRAS. Within the statistics of the present data, both maps provide an overall satisfactory fit. We therefore conclude that adequate tracers of 26Al sources have now been identified. Implications for 26Al source types are discussed (see also Knodlseder, these proceedings).

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