Star formation histories of resolved galaxies
arXiv:0901.1090 · doi:10.1017/S1743921309031718
Abstract
The colour-magnitude diagrams of resolved stellar populations are the best tool to study the star formation histories of the host galactic regions. In this review the method to derive star formation histories by means of synthetic colour-magnitude diagrams is briefly outlined, and the results of its application to resolved galaxies of various morphological types are summarized. It is shown that all the galaxies studied so far were already forming stars at the lookback time reached by the observational data, independently of morphological type and metallicity. Early-type galaxies have formed stars predominantly, but in several cases not exclusively, at the earliest epochs. All the other galaxies appear to have experienced rather continuous star formation activities throughout their lifetimes, although with significant rate variations and, sometimes, short quiescent phases.
10 pages. Invited review, to appear in "The Ages of Stars", proceedings of IAU Symp. 258; revised figure
References in corpus (10)
- Leo A: A Late-Blooming Survivor of the Epoch of Reionization in the Local Group
- I Zw 18 revisited with HST/ACS and Cepheids: New Distance and Age
- Past and present star formation in the SMC: NGC 346 and its neighborhood
- The Discovery of a Population of Pre-Main Sequence Stars in N66/NGC346 from Deep HST/ACS Image
- The Extended Star Formation History of the Andromeda Spheroid at 35 Kpc on the Minor Axis
- The Stellar Populations of M33's Outer Regions III: Star Formation History
- The Stellar Populations of M33's Outer Regions IV: Inflow History and Chemical Evolution
- The Aptly Named Phoenix Dwarf Galaxy
- Old Main-Sequence Turnoff Photometry in the Small Magellanic Cloud. I. Constraints on the Star Formation History in Different Fields
- IZw18, or the picture of Dorian Gray: the more you watch it, the older it gets