COMPTEL search for ^22^Na line emission from recent novae.

Details COMPTEL search for ^22^Na line emission from recent novae. COMPTEL search for ^22^Na line emission from recent novae.

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...300..422i&link_type=abstract

Astronomy and Astrophysics, v.300, p.422

Astronomy and Astrophysics

Astrophysics

72

Gamma-Rays: Observations, Nucleosynthesis, Novae

Scientific paper

The COMPTEL telescope on board the Compton Gamma-Ray Observatory (CGRO) is capable of imaging gamma-ray line sources in the MeV region at a sensitivity of about 10^-5^photons/(cm^2^s). During the period August 1991 to August 1993 of the observation program of CGRO, several recent Galactic novae, some of which were later claimed to be neon-type novae, were in the COMPTEL field of view on a number of occasions. We searched for the ^22^Na line at 1.275MeV from the neon-type novae. No positive detection can be reported. Combining the upper limits to the fluxes from these novae we are able to derive an average 2 σ upper limit for any neon-type novae in the Galactic disk of the order of 3x10^-5^/(cm^2^s), which translates into an upper limit of the ejected ^22^Na mass of 3.7x10^-8^Msun_ . This COMPTEL limit severely constrains modern theories of novae.

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