A new method to derive star formation histories in dwarf galaxies
Marius \v{C}eponis (1), Rima Stonkut\.e (1, 2), Vladas, Vansevi\v{c}ius (1, 2) ((1) Center for Physical Sciences, Technology,, (2) Astronomical Observatory of Vilnius University)
TL;DR
This paper introduces a novel method for deriving two-dimensional star formation histories in dwarf irregular galaxies, revealing recent inside-out star formation propagation and asymmetric distribution patterns correlated with HI surface density.
Contribution
The paper presents a new approach to analyze 2D star formation histories using multicolor stellar photometry data, applied to Leo A galaxy.
Findings
Star formation in Leo A propagated inside-out over the last 400 Myr.
Star-forming regions are asymmetrically distributed from the galaxy's center.
Current star-forming regions correlate with HI surface density maps.
Abstract
We present a new method to derive 2D star formation histories in dwarf irregular galaxies. Based on multicolor stellar photometry data we have found that in the Leo A galaxy during the last 400 Myr star formation was propagating according to the inside-out scenario. Star-forming regions have spread strongly asymmetrically from the center and their present day distribution correlates well with the HI surface density maps.
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