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A new method to derive star formation histories in dwarf galaxies

Published online by Cambridge University Press:  30 October 2019

Marius Čeponis ,
Rima Stonkutė  and
Vladas Vansevičius
Marius Čeponis
Affiliation:
Center for Physical Sciences and Technology, Saulėtekis av. 3, 10257 Vilnius, Lithuania email: marius.ceponis@ftmc.lt
Rima Stonkutė
Affiliation:
Center for Physical Sciences and Technology, Saulėtekis av. 3, 10257 Vilnius, Lithuania email: marius.ceponis@ftmc.lt Astronomical Observatory of Vilnius University, M. K. Čiurlionis st. 29, 03100 Vilnius, Lithuania email: vladas.vansevicius@ff.vu.lt
Vladas Vansevičius
Affiliation:
Center for Physical Sciences and Technology, Saulėtekis av. 3, 10257 Vilnius, Lithuania email: marius.ceponis@ftmc.lt Astronomical Observatory of Vilnius University, M. K. Čiurlionis st. 29, 03100 Vilnius, Lithuania email: vladas.vansevicius@ff.vu.lt
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Abstract

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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.

Keywords

galaxies: dwarfgalaxies: irregulargalaxies: individual Leo A

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