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The ISLAnds Project III: Variable Stars in Six Andromeda Dwarf Spheroidal Galaxies
Clara E. Martínez-Vázquez, Matteo Monelli, Edouard J. Bernard +15
We present a census of variable stars in six M31 dwarf spheroidal satellites observed with the Hubble Space Telescope. We detect 870 RR Lyrae (RRL) stars in the fields of And I (29…
Panchromatic Hubble Andromeda Treasury. XIX. The Ancient Star Formation History of the M31 Disk
Benjamin F. Williams, Andrew E. Dolphin, Julianne J. Dalcanton +7
We map the star formation history across M31 by fitting stellar evolution models to color-magnitude diagrams of each 8383 (0.31.4 kpc, deprojected) region o…
Accurate Distances to Important Spiral Galaxies: M63, M74, NGC 1291, NGC 4559, NGC 4625, NGC 5398
Kristen B. W. McQuinn, Evan D. Skillman, Andrew E. Dolphin +2
Accurate distances are fundamental to interpreting many measured properties of galaxies. Surprisingly, many of the best-studied spiral galaxies in the Local Volume have distance un…