Optical SBFs of shell galaxies.
Cantiello, M.; Brocato, E.; Raimondo, G.; Biscardi, I.
Italy
Abstract
We measure F814W Surface Brightness Fluctuations (SBFs) for a sample of distant shell galaxies observed with the Advanced Camera for Survey (ACS) on board of HST. To evaluate the distance at galaxies, theoretical SBF magnitudes for the ACS@HST filters are computed for single-burst stellar populations covering a wide range of ages (1.5\div 14 Gyr) and metallicities (Z=0.008 \div 0.04). Using these stellar population models we provide the first \overline{M}_{F814W} versus (F475W-F814W)_0 calibration. The results suggest that optical SBFs can be measured at d ≥ 100 Mpc using high-resolution optical data.