174 citations · 743 across the 10 of their papers we have counts for
7 papers · 1 filter
The WFC3 Galactic Bulge Treasury Program: A First Look at Resolved Stellar Population Tools
Thomas M. Brown, Kailash Sahu, Manuela Zoccali +12
[Abridged] When WFC3 is installed on HST, the community will have powerful new tools for investigating resolved stellar populations. The WFC3 Galactic Bulge Treasury program will o…
The Extended Star Formation History of the Andromeda Spheroid at Twenty One Kiloparsecs on the Minor Axis
Thomas M. Brown, Ed Smith, Henry C. Ferguson +8
Using the HST ACS, we have obtained deep optical images of a southeast minor-axis field in the Andromeda Galaxy, 21 kpc from the nucleus. In both star counts and metallicity, this…
The Detailed Star Formation History in the Spheroid, Outer Disk, and Tidal Stream of the Andromeda Galaxy
Thomas M. Brown, Ed Smith, Henry C. Ferguson +5
Using the Advanced Camera for Surveys on the Hubble Space Telescope, we have obtained deep optical images reaching stars well below the oldest main sequence turnoff in the spheroid…
Stellar Cluster Fiducial Sequences with the Advanced Camera for Surveys
Thomas M. Brown, Henry C. Ferguson, Ed Smith +6
We present color-magnitude diagrams of five Galactic globular clusters and one Galactic open cluster spanning a wide range of metallicity (-2.1 < [Fe/H] < +0.3), as observed in the…
RR Lyrae Stars in the Andromeda Halo from Deep Imaging with the Advanced Camera for Surveys
Thomas M. Brown, Henry C. Ferguson, Ed Smith +4
We present a complete census of RR Lyrae stars in a halo field of the Andromeda galaxy. These deep observations, taken as part of a program to measure the star formation history in…
Evidence for a Significant Intermediate-Age Population in the M31 Halo from Main Sequence Photometry
Thomas M. Brown, Henry C. Ferguson, Ed Smith +5
We present a color-magnitude diagram (CMD) for a minor-axis field in the halo of the Andromeda galaxy (M31), 51 arcmin (11 kpc) from the nucleus. These observations, taken with the…