Investigating The Star Formation History of the Nearby Dwarf Irregular Galaxy, NGC 6822

NGC 6822 is an isolated dwarf irregular galaxy in the local group at a distance of ∼ 490 kpc. In this paper, we present the star formation history (SFH) within a field with a radius of ∼ 3 kpc, beyond the optical body of the galaxy ( ∼ 1.2 kpc). We utilized a novel method based on evolved asymptotic giant branch (AGB) stars. We collected the Near-infrared data of 329 variable stars, including long-period and -amplitude variables and Carbon-rich AGB stars. We used stellar evolutionary tracks and theoretical isochrones to obtain the birth mass, age, and pulsation duration of the detected stars to calculate the star formation rate (SFR) and trace the SFH of the galaxy