Fig. 22 from The Recent Star Formation Histories of M81 Group Dwarf Irregular Galaxies

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The Recent Star Formation Histories of M81 Group Dwarf Irregular Galaxies

Authors: Daniel R. Weisz, Evan D. Skillman, John M. Cannon, Andrew E. Dolphin, Robert C. Kennicutt, Jr., Janice Lee, and Fabian Walter

Weisz et al. 2008 The Astrophysical Journal 689 160.

Provider: AAS Journals

Caption: Fig. 22.

Fraction of stars formed in the past 0–1 Gyr (﹩f_{1}﹩), 1–6 Gyr (f₆), and 6–14 Gyr (f₁₄) plotted vs. M_B for both M81 Group (orange triangles) and Local Group (blue circles) galaxies. The gray dashed line represents a transition luminosity noted by Lee et al. (2007) based on Hα EW measurements.

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