Carbon stars are due to their brightness ideal tracers for such a burst.
It might shed some light on the star formation history of the SDG in the last 4 Gyr. The results indicate that the carbon stars are not metal- rich as previously thought. They have a metallicity comparable to the LMC with an age between 0.1-1 Gyr. Mass transfer through binary evolution is suggested as a possible scenario to explain the origin of these low luminosity carbon stars.