Star Formation Histories of Dwarf Galaxies from the Colour-Magnitude Diagrams of Their Resolved Stellar Populations
Figure 20
SFHs of late-type dwarfs outside the Local Group observed with WFPC2 or NICMOS. In all panels, the SFR per unit area as a function of time is plotted. The thin vertical line indicates the lookback time reached by the adopted photometry. Notice that for those galaxies that have been subsequently observed also with the ACS, the lookback time is actually quite older, and always with indisputable evidence of SF activity already in place. References: NGC 1569, [97, 98]; NGC 1705, [99, 100]; I Zw 18, [92]; I Zw 36, [101]; Mrk 178, [102]; UGC 5889, [103].
