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Article 2018-11

Autor: Alonso-García, J. Saito, R.K. Hempel, M. Minniti, D. Pullen, J. Catelan, M. Ramos, R.C. Cross, N.J.G. Gonzalez, O.A. Lucas, P.W. Palma, T. Valenti, E. Zoccali, M.

Context. The inner regions of the Galaxy are severely affected by extinction, which limits our capability to study the stellar populations present there. The Vista Variables in the Vía Láctea (VVV) ESO Public Survey has observed this zone at near-infrared wavelengths where reddening is highly dim...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/11489

Repositorio Universidad Andrés Bello
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Alonso-García, J. ,  Saito, R.K. ,  Hempel, M. ,  Minniti, D. ,  Pullen, J. ,  Catelan, M. ,  Ramos, R.C. ,  Cross, N.J.G. ,  Gonzalez, O.A. ,  Lucas, P.W. ,  Palma, T. ,  Valenti, E. ,  Zoccali, M. ,  [Milky Way demographics with the VVV survey: IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk] ,  Milky Way demographics with the VVV survey: IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk
Article 2018-11

Autor: Braga, V.F. Bhardwaj, A. Contreras Ramos, R. Minniti, D. Bono, G. De Grijs, R. Minniti, J.H. Rejkuba, M.

Context. Type II Cepheids (T2Cs) are radially pulsating variables that trace old stellar populations and provide distance estimates through their period-luminosity (PL) relation. Aims. We trace the structure of old stellar population in the Galactic bulge using new distance estimates and kinemati...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/11524

Repositorio Universidad Andrés Bello
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Braga, V.F. ,  Bhardwaj, A. ,  Contreras Ramos, R. ,  Minniti, D. ,  Bono, G. ,  De Grijs, R. ,  Minniti, J.H. ,  Rejkuba, M. ,  [Structure and kinematics of Type II Cepheids in the Galactic bulge based on near-infrared VVV data] ,  Structure and kinematics of Type II Cepheids in the Galactic bulge based on near-infrared VVV data
Article 2018

Autor: 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.

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 ...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/10564

Repositorio Universidad Andrés Bello
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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
Article 2018-05

Autor: 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.

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...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/8927

Repositorio Universidad Andrés Bello
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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
Article 2018-08

Autor: Contreras Ramos, R. Minniti, D. Gran, F. Zoccali, M. Alonso-Garcia, J. Huijse, P. Navarro, M.G. Rojas-Arriagada, A. Valenti, E.

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...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/10876

Repositorio Universidad Andrés Bello
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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
Article 2018-08

Autor: Renzini, A. Gennaro, M. Zoccali, M. Brown, T.M. Anderson, J. Minniti, D. Sahu, K.C. Valenti, E. Vandenberg, D.A.

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...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/10877

Repositorio Universidad Andrés Bello
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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
Article 2017

Autor: Contreras Ramos, R. Zoccali, M. Rojas, F. Rojas-Arriagada, A. Gárate, M. Huijse, P. Gran, F. Soto, M. Valcarce, A.A.R. Estévez, P.A. Minniti, D.

Context. In the last six years, the VISTA Variable in the Vía Láctea (VVV) survey mapped 562 sq. deg. across the bulge and southern disk of the Galaxy. However, a detailed study of these regions, which includes ∼36 globular clusters (GCs) and thousands of open clusters is by no means an easy chal...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/6201

Repositorio Universidad Andrés Bello
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Contreras Ramos, R. ,  Zoccali, M. ,  Rojas, F. ,  Rojas-Arriagada, A. ,  Gárate, M. ,  Huijse, P. ,  Gran, F. ,  Soto, M. ,  Valcarce, A.A.R. ,  Estévez, P.A. ,  Minniti, D. ,  [Proper motions in the VVV Survey: Results for more than 15 million stars across NGC 6544] ,  Proper motions in the VVV Survey: Results for more than 15 million stars across NGC 6544
Article 2017-11

Autor: Minniti, D. Geisler, D. Alonso-Garcia, J. Palma, T. Beamin, J.C. Borissova, J. Catelan, M. Clariá, J.J. Cohen, R.E. Ramos, R.C. Dias, B. Fernández-Trincado, J.G. Gómez, M. Hempel, M. Ivanov, V.D. Kurtev, R. Lucas, P.W. Moni-Bidin, C. Pullen, J. Alegria, S.R. Saito, R.K. Valenti, E.

It is likely that a number of Galactic globular clusters remain to be discovered, especially toward the Galactic bulge. High stellar density combined with high and differential interstellar reddening are the two major problems for finding globular clusters located toward the bulge. We use the dee...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/5907

Repositorio Universidad Andrés Bello
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Minniti, D. ,  Geisler, D. ,  Alonso-Garcia, J. ,  Palma, T. ,  Beamin, J.C. ,  Borissova, J. ,  Catelan, M. ,  Clariá, J.J. ,  Cohen, R.E. ,  Ramos, R.C. ,  Dias, B. ,  Fernández-Trincado, J.G. ,  Gómez, M. ,  Hempel, M. ,  Ivanov, V.D. ,  Kurtev, R. ,  Lucas, P.W. ,  Moni-Bidin, C. ,  Pullen, J. ,  Alegria, S.R. ,  Saito, R.K. ,  Valenti, E. ,  [New VVV Survey Globular Cluster Candidates in the Milky Way Bulge] ,  New VVV Survey Globular Cluster Candidates in the Milky Way Bulge
Article 2018

Autor: Marconi, M. Minniti, D.

We report the first estimate of the He abundance of the population of RR Lyrae stars in the Galactic bulge. This is done by comparing the recent observational data with the latest models. We use the large samples of ab-type RR Lyrae stars found by OGLE IV in the inner bulge and by the VVV survey ...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/6721

Repositorio Universidad Andrés Bello
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Marconi, M. ,  Minniti, D. ,  [Gauging the Helium Abundance of the Galactic Bulge RR Lyrae Stars] ,  Gauging the Helium Abundance of the Galactic Bulge RR Lyrae Stars
Article 2017

Autor: Navarro, M.G. Minniti, D. Ramos, R.C.

We search for microlensing events in the highly reddened areas surrounding the Galactic center using the near-IR observations with the VISTA Variables in the Vía Láctea Survey (VVV). We report the discovery of 182 new microlensing events, based on observations acquired between 2010 and 2015. We p...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/6195

Repositorio Universidad Andrés Bello
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Navarro, M.G. ,  Minniti, D. ,  Ramos, R.C. ,  [VVV Survey Microlensing Events in the Galactic Center Region] ,  VVV Survey Microlensing Events in the Galactic Center Region

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