Other
Scientific paper
Sep 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.459..101s&link_type=abstract
In: Exploring the gamma-ray universe. Proceedings of the Fourth INTEGRAL Workshop, 4-8 September 2000, Alicante, Spain. Editor:
Other
1809 Kev Emission, Supernovae
Scientific paper
Recent observations of the 1809 keV line have indicated that the bulk of the 26Al must have a velocity of ~500 km s-1 (Naya et al. 1996). We have previously shown that a velocity this large could be maintained over the 106 year lifetime of the 26Al if it is trapped in dust grains that are reaccelerated periodically in the ISM (Sturner & Naya 1999). Here we investigate whether a dust grain velocity of ~500 km s-1 will produce a distribution in latitude of 1809 keV emission that is consistent with the distribution seen by COMPTEL. We find that dust grain velocities ~500 km s-1 are able to reproduce the COMPTEL 1809 keV emission maps reconstructed using the Richardson-Lucy and maximum entropy image reconstruction methods. The 26Al production rate that is needed to reproduce the observed 1809 keV intensity yields in a Galactic mass of 26Al of ~1.5 - 2 Msolar which is in good agreement with both other observations and theoretical production rates.
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