Radioactive and kinematic tracers of feedback from massive stars

Details Radioactive and kinematic tracers of feedback from massive stars Radioactive and kinematic tracers of feedback from massive stars

2011-11-07

arxiv.org/abs/1111.1654v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

3 pages conference proceeding (Assembling the puzzle of the MW)

Scientific paper

The mixing of ejecta from young stars into the interstellar medium is an important process in the interplay between star formation and galaxy evolution. A unique window into these processes is provided by the radioactive isotopes $^{26}$Al, traced by its $\gamma$-ray decay lines at 1.8 MeV. With a mean lifetime of $\sim$1 Myr it is a long-term tracer of nucleosynthesis for massive stars. Our population synthesis code models the ejection of $^{26}$Al, together with the $^{60}$Fe, the kinetic energy and UV radiation for a population of massive stars. We have applied the code to study the nearby Orion region and the more massive Carina region and found good agreement with observational constraints.

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