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Spitzer-IRS Study of the Antennae Galaxies NGC 4038/39

  • Authors: B. R. Brandl, L. Snijders, M. den Brok, D. G. Whelan, B. Groves, P. van der Werf, V. Charmandaris, J. D. Smith, L. Armus, R. C. Kennicutt, Jr., and J. R. Houck

BRANDL et al. 2009 The Astrophysical Journal 699 1982.

  • Provider: AAS Journals

Caption: Figure 6.

Hardness of the radiation field (as measured by the line flux ratio of [Ne iii]/[Ne ii]) vs. the average age of the SSCs from Table 8. The horizontal dotted lines indicate the age ranges covered by the various estimates.

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