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Braga, V.F.Stetson, P.B.Bono, G.Dall'Ora, M.Ferraro, I.Fiorentino, G.Iannicola, G.Marconi, M.Marengo, M.Monson, A.J.Neeley, J.Persson, S.E.Beaton, R.L.Buonanno, R.Calamida, A.Castellani, M.Carlo, E.D.Fabrizio, M.Freedman, W.L.Inno, L.Madore, B.F.Magurno, D.Marchetti, E.Marinoni, S.Marrese, P.Matsunaga, N.Minniti, D.Monelli, M.Nonino, M.Piersimoni, A.M.Pietrinferni, A.Prada-Moroni, P.Pulone, L.Stellingwerf, R.Tognelli, E.Walker, A.R.Valenti, E.Zoccali, M.[On the RR Lyrae Stars in Globulars. V. the Complete Near-infrared (JHK s) Census of ω Centauri RR Lyrae Variables]On the RR Lyrae Stars in Globulars. V. the Complete Near-infrared (JHK s) Census of ω Centauri RR Lyrae Variables

ω Centauri (NGC 5139) contains many variable stars of different types, including the pulsating type II Cepheids, RR Lyrae and SX Phoenicis stars. We carried out a deep, wide-field, near-infrared (IR) variability survey of ω Cen, using the VISTA telescope. We assembled an unprecedented homogeneous...


Navarrete, C.Catelan, M.Contreras Ramos, R.Alonso-García, J.Gran, F.Dékány, I.Minniti, D.[Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations]Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations

The VVV survey observed some of the most crowded and most obscured regions in the inner Milky Way during the last years. A significant sample of the less known globular clusters in our galaxy lie there. Combining the high-resolution, wide-field, near infrared capabilities of the survey camera, th...


Alonso-García, J.Catelan, M.Ramos, R.C.Dékány, I.Minniti, D.[Variable stars in the VVV globular clusters]Variable stars in the VVV globular clusters

We report the discovery of an enigmatic large-amplitude (ΔKs >10.5 mag) transient event in near-IR data obtained by the VISTA Variables in the Via Lactea (VVV) ESO Public Survey. The object (designated VVV-WIT- 06) is located at R.A.=17:07:18.917, decl.=-39:06:26.45 (J2000), corresponding to Gala...


Minniti, D.Saito, R.K.Forster, F.Pignata, G.Ivanov, V.D.Lucas, P.W.Beamin, J.C.Borissova, J.Catelan, M.Gonzalez, O.A.Hempel, M.Hsiao, E.Kurtev, R.Majaess, D.Masetti, N.Morrell, N.I.Phillips, M.M.Pullen, J.B.Rejkuba, M.Smith, L.Surot, F.Valenti, E.Zoccali, M.[The Emergence of the Infrared Transient VVV-WIT-06]The Emergence of the Infrared Transient VVV-WIT-06

Context. Oxygen and zinc in the Galactic bulge are key elements for the understanding of the bulge chemical evolution. Oxygen-to-iron abundance ratios provide a most robust indicator of the star formation rate and chemical evolution of the bulge. Zinc is enhanced in metal-poor stars, behaving as ...


Da Silveira, C.R.Barbuy, B.Friaça, A.C.S.Hill, V.Zoccali, M.Rafelski, M.Gonzalez, O.A.Minniti, D.Renzini, A.Ortolani, S.[Oxygen and zinc abundances in 417 Galactic bulge red giants]Oxygen and zinc abundances in 417 Galactic bulge red giants

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

Deep near-IR images from the VISTA Variables in the V a L ctea (VVV) Survey were used to search for RR Lyrae stars within 100 arcmin from the Galactic Center. A large sample of 960 RR Lyrae of type ab (RRab) stars were discovered. A catalog is presented featuring the positions, magnitudes, colors...


Contreras Ramos, R.Minniti, D.Gran, F.Zoccali, M.Alonso-Garcia, J.Huijse, P.Navarro, M.G.Rojas-Arriagada, A.Valenti, E.[The VVV Survey RR Lyrae Population in the Galactic Center Region]The VVV Survey RR Lyrae Population in the Galactic Center Region

We use deep, multi-epoch near-IR images of the VISTA Variables in the Via Lictea (VVV) Survey to measure proper motions (PMs) of stars in the Milky Way globular cluster (GC) FSR1716 = VVV-GC05. The colormagnitude diagram of this object, made by using PM-selected members, shows an extended horizon...


Ramos, R.C.Minniti, D.Fernández-Trincado, J.G.Alonso-Garcia, J.Catelan, M.Gran, F.Hajdu, G.Hanke, M.Hempel, M.Diaz, E.M.Pérez-Villegas, A.Rojas-Arriagada, A.Zoccali, M.[The Orbit of the New Milky Way Globular Cluster FSR1716 =VVV-GC05]The Orbit of the New Milky Way Globular Cluster FSR1716 =VVV-GC05

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

We present the discovery of 816 high-amplitude infrared variable stars (ΔKs > 1 mag) in 119 deg2 of the Galactic mid-plane covered by the VISTA Variables in the Via Lactea (VVV) survey. Almost all are new discoveries and about 50 per cent are young stellar objects (YSOs). This provides further ev...


Contreras Peña, C.Lucas, P.W.Minniti, D.Kurtev, R.Stimson, W.Navarro Molina, C.Borissova, J.Kumar, M.S.N.Thompson, M.A.Gledhill, T.Terzi, R.Froebrich, D.Caratti o Garatti, A.[A population of eruptive variable protostars in VVV]A population of eruptive variable protostars in VVV

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