Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...407..634b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 407, no. 2, p. 634-638.
Astronomy and Astrophysics
Astrophysics
21
Interstellar Gas, Iron, Molecular Clouds, Supernovae, Galactic Halos, High Temperature Gases, Milky Way Galaxy, Photoionization
Scientific paper
Simple calculations on the dispersal of iron through the interstellar medium (ISM) indicate that cloud motions may be the most important mechanism for this dispersal, whereas turbulence in the intercloud gas and, in a three-phase ISM, supernova shocks probably play a lesser role. The calculations raise some doubts as to the importance of chimneys for mixing on a Galactic scale, though there is insufficient observational data to draw more than tentative conclusions. The distance over which iron produced by a supernova in the local Galactic disk is mixed over one recycling time of the ISM is found to be between about 0.5 and 2.0 kpc, consistent with the chemical homogeneity of star clusters and the observed gradient in (Fe/H).
Bateman Nicholas P.
Larson Richard B.
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