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RR Lyrae variables in M32 and the disk of M31
Giuliana Fiorentino, Antonela Monachesi, Scott C. Trager +7
We observed two fields near M32 with the Advanced Camera for Surveys/High Resolution Channel (ACS/HRC) on board the Hubble Space Telescope (HST). The main field, F1, is 1.8 arcmin…
M32: Is There An Ancient, Metal-Poor Population?
G. Fiorentino, A. Monachesi, S. Trager +7
We observed two fields near M32 with the ACS/HRC on board the Hubble Space Telescope, located at distances of about 1.8' and 5.4' (hereafter F1 and F2, respectively) from the cente…
Probing recent star formation with absorption-line strengths in hierarchical models and observations
S. C. Trager, R. S. Somerville
Stellar population parameters derived from spectral line-strengths provide a powerful probe of galaxy properties and formation histories. We implement the machinery for extracting…