Browsing by Author "Contreras Ramos, Rodrigo Andrés"
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- ItemA colour-excess extinction map of the southern Galactic disc from the VVV and GLIMPSE surveys(2019) Soto, M.; Barba, R.; Minniti, D.; Kunder, A.; Majaess, D.; Nilo Castellon, J. L.; Alonso García, J.; Leone, G.; Contreras Ramos, Rodrigo Andrés; Hempel, Maren; Morelli, Lorenzo; Haikala, L.; Firpo, V.; Lucas, P.; Emerson, J. P.; Bidin, C. M.; Geisler, D.; Saito, R. K.; Gurovich, S.; Rejkuba, M.; Barbieri, M.; Román Lopes, A.; Alonso, M. V.; Baravalle, L. D.; Borissova, J.; Kurtev, R.; Milla, F
- ItemA misidentified RR Lyrae variable star in omega Centauri(2013) Navarrete Silva, Camila Andrea; Catelan, Márcio; Contreras Ramos, Rodrigo Andrés; Alonso Garcia, J.; Dekany, Istvan; Gran Merino, Felipe Eduardo; Hempel, Maren; Angeloni, Rodolfo
- ItemAn AO-assisted variability study of four globular clusters(2016) Salinas, R.; Contreras Ramos, Rodrigo Andrés; Strader, J.; Hakala, P.; Catelan, Márcio; Peacock, M. B.; Simunovic , M.
- ItemBulge RR Lyrae stars in the VVV tile b201(2015) Gran, F.; Minniti, D.; Saito, R. K.; Navarrete, C.; Dékány, I.; McDonald, I.; Contreras Ramos, Rodrigo Andrés; Catelan, Márcio
- ItemCharacterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane(2017) Minniti, D.; Dekany, Istvan; Majaess, Daniel; Palma, Tali; Pullen, Joyce; Rejkuba, Marina; Alonso-García, Javier; Catelan, Márcio; Hempel, Maren; Zoccali, Manuela; Contreras Ramos, Rodrigo Andrés; Gonzalez, Oscar A.; Irwin, Mike; Lucas, Philip W.; Saito, Roberto K.; Tissera, Patricia; Valenti, Elena
- ItemDiscovery of Tidal RR Lyrae Stars in the Bulge Globular Cluster M62(2018) Minniti, D.; Fernandez-Trincado, Jose G.; Ripepi, Vincenzo; Alonso-Garcia, Javier; Contreras Ramos, Rodrigo Andrés; Marconi, Marcella
- ItemDOES THE OOSTERHOFF DICHOTOMY EXIST IN THE ANDROMEDA GALAXY? I. THE CASE OF G11(2013) Contreras Ramos, Rodrigo Andrés; Catelan, Márcio
- ItemExtinction Ratios in the Inner Galaxy as Revealed by the VVV Survey(2017) Alonso-García Javier; Minniti, D.; Catelan, Márcio; Contreras Ramos, Rodrigo Andrés; Gonzalez, Oscar A.; Hempel, Maren; Lucas Philip W.; Saito Roberto K.; Valenti Elena; Zoccali, Manuela
- ItemMilky Way demographics with the VVV survey IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk(2018) Alonso-Garcia, Javier; Saito, Roberto K.; Hempel, Maren; Minniti, D.; Pullen, Joyce; Catelan, Márcio; Contreras Ramos, Rodrigo Andrés; Cross, Nicholas J.G.; Gonzalez, Oscar A.; Zoccali, Manuela; Lucas, Philip W.; Palma, Tali; Valenti, Elena
- ItemMultiple stellar populations in the globular cluster M3 (NGC 5272): a Strömgren perspective(OUP, 2016) Massari, D.; Lapenna, E.; Bragaglia, A.; Dalessandro, E.; Contreras Ramos, Rodrigo Andrés; Amigo Fuentes, PíaWe present Strömgren photometry of the Galactic Globular Cluster M3 to study its multiple generations phenomenon. The use of different colour–magnitude diagrams (CMDs) and especially of the notoriously efficient c y index allowed us to detect a double red giant branch in the cluster CMD. After decontamination from fore- and background sources, the two sequences turned out to be equally populated. The two components also show a bimodal radial distribution well corresponding to that predicted by numerical simulations for clusters living in an intermediate dynamical evolutive state and with a population with modified chemical composition that was born more centrally concentrated than the primordial. The analysis of high-resolution spectra quantitatively demonstrates that the two detected sequences correspond to the first (Na-poor) generation and the second (Na-rich) generation, thus confirming the importance of synergy between photometry and spectroscopy.
- ItemNew VVV Survey Globular Cluster Candidates in the Milky Way Bulge(2017) Minniti, D.; Geisler, D.; Alonso, J.; Palma, T.; Beamin, J.; Borissova, J.; Catelan, Márcio; Claria, J.; Hempel, Maren; Contreras Ramos, Rodrigo Andrés; Cohen, R.; Días, B.; Fernández, J.; Gómez, M.; Ivanov, V.; Kurtev, R.
- ItemProper motions in the VVV Survey: Results for more than 15 million stars across NGC 6544(2017) Contreras Ramos, Rodrigo Andrés; Zoccali, Manuela; Rojas, F.; Rojas Arriagada, A.; Gárate, M.; Huijse, P.; Gran, F.; Valcarce Bravo, Aldo Alfonso Raúl; Estévez, P. A.; Minniti, D.
- ItemStellar variability at the main-sequence turnoff of the intermediate-age LMC cluster NGC 1846(2018) Salinas, R.; Pajkos, M.A.; Vivas, A.K.; Strader, J.; Contreras Ramos, Rodrigo Andrés
- ItemStellar variability in the VVV survey(2013) Catelan, Márcio; Minniti, D.; Lucas, P. W.; Dékány, I.; Saito, R. K.; Angeloni, Rodolfo; Alonso-García, J.; Hempel, M.; Helminiak, Krzysztof Grzegorz; Jordán, A.; Contreras Ramos, Rodrigo Andrés; Navarrete, C.; Beamin Muhlenbrock, Juan Carlos; Rojas, A. F.; Gran, F.; Ferreira Lopes, C. E.; Contreras Peña, Carlos Eduardo; Kerins, E.; Huckvale, L.; Rejkuba, M.; Cohen, R.; Mauro, F.; Borissova, J.; Amigo, P.; Eyheramendy Duerr, Susana; Pichara Baksai, Karim Elías; Espinoza, N.; Navarro, C.; Hajdu, G.; Calderón Espinoza, Diego Nicolás; Muro, G. A.; Andrews, H.; Motta, V.; Kurtev, R.; Emerson, J. P.; Moni Bidin, C.; Chené, A. -N.The Vista Variables in the Via Lactea (VVV) ESO Public Survey is an ongoing time-series, near-infrared (IR) survey of the Galactic bulge and an adjacent portion of the inner disk, covering 562 square degrees of the sky, using ESOs VISTA telescope. The survey has provided superb multi-color photometry in 5 broadband filters ($Z$, $Y$, $J$, $H$, and $K_s$), leading to the best map of the inner Milky Way ever obtained, particularly in the near-IR. The main variability part of the survey, which is focused on $K_s$-band observations, is currently underway, with bulge fields having been observed between 31 and 70 times, and disk fields between 17 and 36 times. When the survey is complete, bulge (disk) fields will have been observed up to a total of 100 (60) times, providing unprecedented depth and time coverage. Here we provide a first overview of stellar variability in the VVV data, including examples of the light curves that have been collected thus far, scientific applications, and our efforts towards the automated classification of VVV light curves....
- ItemStellar variability in the VVV survey: overview and first results(2013) Catelan, Márcio; Minniti, D.; Lucas, P. W.; Dékány, I.; Saito, R. K.; Angeloni, Rodolfo; Alonso-García, J.; Hempel, M.; Hełminiak, K.; Jordán, A.; Contreras Ramos, Rodrigo Andrés; Navarrete, C.; Beamin Muhlenbrock, Juan Carlos; Rojas, A. F.; Gran, F.; Ferreira Lopes, C. E.; Contreras Peña, Carlos Eduardo; Kerins, E.; Huckvale, L.; Rejkuba, M.; Cohen, R.; Mauro, F.; Borissova, J.; Amigo, P.; Eyheramendy Duerr, Susana; Pichara Baksai, Karim Elías; Espinoza, N.; Navarro, C.; Hajdu, G.; Calderón Espinoza, Diego Nicolás; Muro, G. A.; Andrews, H.; Motta, V.; Kurtev, R.; Emerson, J. P.; Moni Bidin, C.; Chené, A. -N.The Vista Variables in the Vía Láctea (VVV) ESO Public Survey is an ongoing time-series, near-infrared (IR) survey of the Galactic bulge and an adjacent portion of the inner disk, covering 562 square degrees of the sky, using ESOs VISTA telescope. The survey has provided superb multi-color photometry in 5 broadband filters (Z, Y, J, H, and K<SUB>s</SUB> ), leading to the best map of the inner Milky Way ever obtained, particularly in the near-IR. The main part of the survey, which is focused on the variability in the K<SUB>s</SUB> -band, is currently underway, with bulge fields observed between 34 and 73 times, and disk fields between 34 and 36 times. When the survey is complete, bulge (disk) fields will have been observed up to a total of 100 (60) times, providing unprecedented depth and time coverage in the near-IR. Here we provide a first overview of stellar variability in the VVV data....
- ItemStructure and kinematics of Type II Cepheids in the Galactic bulge based on near-infrared VVV data(2018) Braga, V.F.; Bhardwaj, A.; Contreras Ramos, Rodrigo Andrés; Minniti, D.; Bono, G.
- ItemThe asymptotic evolution of the stellar merger V1309 Sco : a Blue Straggler in the making?(2019) Ferreira, T.; Saito, R. K.; Minniti, D.; Navarro, M. G.; Contreras Ramos, Rodrigo Andrés; Smith, L.; Lucas, P. W.
- ItemThe Orbit of the New Milky Way Globular Cluster FSR1716 =VVV-GC05(2018) Contreras Ramos, Rodrigo Andrés; Minniti, D.; Fernández Trincado, José G.; Alonso García, Javier; Catelan, Márcio; Gran, Felipe; Hajdu, Gergely; Hempel, Maren; Rojas Arriagada, Álvaro; Zoccali, Manuela
- ItemThe VVV Survey RR Lyrae Population in the Galactic Center Region(2018) Contreras Ramos, Rodrigo Andrés; Minniti, D.; Gran, Felipe; Zoccali, Manuela; Alonso-Garcia, Javier; Huijse, Pablo; Gabriela Navarro, Maria; Rojas-Arriagada, Alvaro; Valenti, Elena
- ItemTIME-SERIES PHOTOMETRY OF GLOBULAR CLUSTERS: M62 (NGC 6266), THE MOST RR LYRAE-RICH GLOBULAR CLUSTER IN THE GALAXY?(2010) Contreras Ramos, Rodrigo Andrés; Catelan, Márcio