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We report results from an exploratory study implementing a new probe of Galactic evolution using archival Hubble Space Telescope imaging observations. Precise proper motions are combined with photometric relative metallicity and temperature indices, to produce the proper-motion rotation curves of...


Clarkson, W.I.Calamida, A.Sahu, K.C.Brown, T.M.Gennaro, M.Avila, R.J.Valenti, J.Debattista, V.P.Rich, R.M.Minniti, D.Zoccali, M.Aufdemberge, E.R.[Chemically Dissected Rotation Curves of the Galactic Bulge from Main-sequence Proper Motions]Chemically Dissected Rotation Curves of the Galactic Bulge from Main-sequence Proper Motions

The Hubble Space Telescope/WFC3 multiband photometry spanning from the UV to the near-IR of four fields in the Galactic bulge, together with that for six template globular and open clusters, are used to photometrically tag the metallicity [Fe/H] of stars in these fields after proper-motion reject...


Renzini, A.Gennaro, M.Zoccali, M.Brown, T.M.Anderson, J.Minniti, D.Sahu, K.C.Valenti, E.Vandenberg, D.A.[The WFC3 Galactic Bulge Treasury Program: Relative Ages of Bulge Stars of High and Low Metallicity]The WFC3 Galactic Bulge Treasury Program: Relative Ages of Bulge Stars of High and Low Metallicity

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