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Spatial distribution and evolution of the stellar populations and candidate star clusters in the Blue Compact Dwarf I Zwicky 18
R. Contreras Ramos, F. Annibali, G. Fiorentino +7
The evolutionary properties and spatial distribution of I Zwicky 18 stellar populations are analyzed by means of HST/ACS deep and accurate photometry. The comparison of the resulti…
Star formation in 30 Doradus
Guido De Marchi, Francesco Paresce, Nino Panagia +24
Using observations obtained with the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope (HST), we have studied the properties of the stellar populations in the central…
Using H-alpha Morphology and Surface Brightness Fluctuations to Age-Date Star Clusters in M83
Bradley C. Whitmore, Rupali Chandar, Hwihyun Kim +21
We use new WFC3 observations of the nearby grand design spiral galaxy M83 to develop two independent methods for estimating the ages of young star clusters. The first method uses t…
Calibration of BVRI Photometry for the Wide Field Channel of the HST Advanced Camera for Surveys
Abhijit Saha, Richard A. Shaw, Jennifer A. Claver +1
We present new observations of two Galactic globular clusters, PAL4 and PAL14, using the Wide-Field Channel of the Advanced Camera for Surveys (ACS) on board the Hubble Space Teles…
Deep Wide-Field Imaging down to the oldest Main Sequence Turnoffs in the Sculptor dwarf spheroidal galaxy
T. J. L. de Boer, E. Tolstoy, A. Saha +7
We present wide-field photometry of resolved stars in the nearby Sculptor dwarf spheroidal galaxy using CTIO/MOSAIC, going down to the oldest Main Sequence Turn-Off. The accurately…
Large-scale shock-ionized and photo-ionized gas in M83: the impact of star formation
Sungryong Hong, Daniela Calzetti, Michael A. Dopita +20
We investigate the ionization structure of the nebular gas in M83 using the line diagnostic diagram, [O III](5007 \degA)/Hβ vs. [S II](6716 °A+6731 °A)/Hα with the newly available…