Study of the Galactic distribution of nova-produced 22Na with COMPTEL

Astronomy and Astrophysics – Astrophysics

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Globular Clusters In The Milky Way, Gamma-Ray, X- And Gamma-Ray Telescopes And Instrumentation

Scientific paper

The COMPTEL telescope on board the Compton Gamma-Ray Observatory (CGRO) is capable of imaging γ-ray line sources, like classical novae, in the MeV regime at a level of sensitivity up to a few 10-5 photons cm-2s-1. At this level of sensitivity quite high expectations can be placed on the detection of the predicted 22Na γ-ray line at 1.275 MeV from nearby novae. Unfortunately, no positive detection of the nova-produced 22Na was reported until recently. We have used COMPTEL data collected up to the 2nd CGRO reboost to assess (1)-sodium production by individual novae, and (2)-the Galactic distribution of the nova-produced 22Na. .

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