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The red stellar population in NGC 1569
A. Aloisi, M. Clampin, E. Diolaiti +6
We present HST NICMOS photometry of the resolved stellar population in NGC 1569. The CMD in the F110W and F160W photometric bands contains ~2400 stars with a formal photometric err…
A Compact Population of Red Giants in the Blue Compact Dwarf Galaxy UGCA 290
Mary M. Crone, Regina E. Schulte-Ladbeck, Ulrich Hopp +1
We present HST/WFPC2 single-star photometry for the blue dwarf galaxy UGCA 290, whose morphology is intermediate between classic iE Blue Compact Dwarfs and blue dwarfs which exhibi…
A Near-Infrared Stellar Census of Blue Compact Dwarf Galaxies: NICMOS Detection of Red Giant Stars in the Wolf-Rayet Galaxy Mrk 178
Regina E. Schulte-Ladbeck, Ulrich Hopp, Laura Greggio +1
We observed the Blue Compact Dwarf/Wolf-Rayet galaxy Mrk 178 with the NICMOS camera aboard HST. The galaxy is well resolved into individual stars in the near-IR; photometry in J an…
The evolution of the color gradients of early-type cluster galaxies
R. P. Saglia, C. Maraston, L. Greggio +2
We investigate the origin of color gradients in cluster early-type galaxies to probe whether pure age or pure metallicity gradients can explain the observed data in local and dista…