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Date and Time of the Query: 2019-05-20 T16:16:24 PDT
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For refcode 2008ApJ...678..168B:
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Copyright by American Astronomical Society. Reproduced by permission
2008ApJ...678..168B Optical Surface Brightness Fluctuations of Shell Galaxies toward 100 Mpc Biscardi, I.; Raimondo, G.; Cantiello, M.; Brocato, E. Abstract. We measure F814W surface brightness fluctuations (SBFs) for a sample of distant shell galaxies with radial velocities ranging from 4000 to 8000 km s^-1^. The distance at galaxies is then evaluated by using the SBF method. For this purpose, theoretical SBF magnitudes for the HST ACS filters are computed for single-burst stellar populations covering a wide range of ages (t=1.5-14 Gyr) and metallicities (Z=0.008-0.04). Using these stellar population models, we provide the first M_F814W_ versus (F475W-F814W)_0_ calibration and we extend the previous M_1_ versus (B-I)_0_ color relation to colors (B-I)_0_<=2.0 mag. Coupling our SBF measurements with the theoretical calibration we derive distances with a statistical uncertainty of ~8%, and systematic error of ~6%. The procedure developed to analyze data ensures that the indetermination due to possible unmasked residual shells is well below ~12%. The results suggest that optical SBFs can be measured at d>=100 Mpc with HST ACS imaging. SBF-based distances coupled with recession velocities corrected for peculiar motion, allow us obtain H_0_=76+/-6 (statistical) +/-5 (systematic) km s^-1^ Mpc^-1^. Key words: Galaxies: Distances and Redshifts, Galaxies: Elliptical and Lenticular, cD, Galaxies: Photometry
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