Possible sites of nuclear line emission from massive OB associations.

Details Possible sites of nuclear line emission from massive OB associations. Possible sites of nuclear line emission from massive OB associations.

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..120c.349h&link_type=abstract

Astronomy and Astrophysics Supplement, v.120, p.349-352

Astronomy and Astrophysics

Astrophysics

1

Nucleosynthesis, Supernova Remnants, Ism: Clouds, Gamma Rays: Theory, Cosmic Rays

Scientific paper

Intense γ-ray line emission at 4.44 and 6.13MeV from the nuclear deexcitation of ^12^C^*4.44^ and ^16^O^*6.13^ has recently been discovered (Bloemen et al. 1994A&A...281L...5B) by the COMPTEL experiment from the Orion complex, a nearby (~450pc) molecular cloud with a resident association of massive OB stars. This emission is apparently produced by low energy (<30MeV/nucleon) cosmic rays, which are accelerated by shocks and undergo nuclear interactions with the dense cloud gas. To test this hypothesis, we have identified several similar candidate OB associations from which we would also expect comparable fluxes in these two nuclear γ-ray lines.

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