Browsing by Title Artículos de revistas

Now showing items 4552-4571 of 7543

    • Observability of planet-disc interactions in CO kinematics 
      Pérez, Sebastián; Casassus Montero, Simón; Benítez-Llambay, P. (Oxford University Press, 2018)
      Empirical evidence of planets in gas-rich circumstellar discs is required to constrain giant planet formation theories. Here we study the kinematic patterns which arise from planet- disc interactions and their observability ...
    • Observaciones geomorfológicas en Ultima Esperanza, Chile, y consideraciones sobre la elasticidad de la ... 
      Cecioni, Giovanni (Universidad de Chile, 1978)
      Geológicamente esta región se puede dividir en dos fajas dispuestas aproximadamente N-S; la oriental constituida por una serie de formaciones arenosas y arcillosas del Cretacico más alto, hasta la base del Maastrichtiano; ...
    • Observation and modelling of vegetation spirals and arcs in isotropic environmental conditions: Dissipative ... 
      Tlidi, M.; Clerc Gavilán, Marcel; Escaff, D.; Couteron, P.; Messaoudi, M.; Khaffou, M.; Makhoute, A. (Royal Society Publishing, 2018)
      We report for the first time on the formation of spirals like vegetation patterns in isotropic and uniform environmental conditions. The vegetation spirals are not waves and they do not rotate. They belong to the class of ...
    • Observation of broad‑band wáter waveguiding in shallow water: a revival 
      Sepúlveda Soto, Fabián; Guzmán Silva, Diego; Rosas, Edgardo; Vicencio, Rodrigo A.; Falcón, Claudio (Nature, 2020)
      We report on the observation and characterization of broad-band waveguiding of surface gravity waves in an open channel, in the shallow water limit. The waveguide is constructed by changing locally the depth of the fluid ...
    • Observation of intensity of cosmic rays and daily magnetic shifts near meridian 70 degrees in the South America 
      Cordaro Cárdenas, Enrique; Gálvez, D.; Laroze, D. (Elsevier, 2016)
      In analysis of experiments carried during September 2008 using secondary cosmic ray detectors located in Chacaltaya (Bolivia) and Niteroi (Brazil), Augusto et al. (2010) showed an increase in the intensity of charged ...
    • Observation of preferred instability modes in a mechanically excited thermal plume using Schlieren visualizations 
      Elicer Cortés, Juan; Ruz, C.; Hernández, R. H.; Pavageau, Michel; Boyer, Denis (PERGAMON-ELSEVIER SCIENCE LTD, 2005-02)
      An experimental study of the instability modes of a laminar axisymmetric thermal plume under symmetrical controlled disturbances of varicose type was carried out. The Schlieren technique was used to investigate the considered ...
    • Observational calibration of the projection factor of Cepheids 
      Breitfelder, J.; Kervella, Pierre; Mérand, A.; Gallenne, A.; Szabados, L.; Anderson, R. I.; Willson, M.; Le Bouquin, J.-B. (EDP SCIENCES, 2015)
      Context. The distance of pulsating stars, in particular Cepheids, are commonly measured using the parallax of pulsation technique. The different versions of this technique combine measurements of the linear diameter variation ...
    • Observational calibration of the projection factor of Cepheids II. Application to nine Cepheids with HST/FGS ... 
      Breitfelder, J.; Mérand, A.; Kervella, Pierre; Gallenne, A.; Szabados, L.; Anderson, R. I.; Le Bouquin, J.-B. (ESO, 2016-03)
      Context. The distance to pulsating stars is classically estimated using the parallax-of-pulsation (PoP) method, which combines spectroscopic radial velocity (RV) measurements and angular diameter (AD) estimates to derive ...
    • Observational constraints on the progenitor metallicities of core-collapse supernovae 
      Anderson, Joseph P.; Covarrubias, R. A.; James, P. A.; Hamuy Wackenhut, Mario; Habergham, S. M. (Royal Astronomical Society, 2010)
      We present constraints on the progenitor metallicities of core-collapse supernovae. To date, nearly all metallicity constraints have been inferred from indirect methods such as metallicity gradients in host galaxies, ...
    • Observational templates of star cluster disruption - The stellar group NGC 1901 in front of the Large ... 
      Carraro, Giovanni; Fuente, Marcos R. de la; Villanova, S.; Bidin, C. Moni; Fuente, Marcos C. de la; Baumgardt, H.; Solivella, G. (2007)
      Context. Observations indicate that present-day star formation in the Milky Way disk takes place in stellar ensembles or clusters rather than in isolation. Bound, long-lived stellar groups are known as open clusters. They ...
    • Observations of edge-on protoplanetary disks with ALMA I. Results from continuum data 
      Villenave, M.; Menard, F.; Dent, W. R. F.; Duchene, G.; Stapelfeldt, K. R.; Benisty, M.; Boehler, Y.; Van der Plas, G.; Pinte, C.; Telkamp, Z.; Wolff, S.; Flores, C.; Lesur, G.; Louvet, F.; Riols, A.; Dougados, C.; Williams, H.; Padgett, D. (EDP, 2020)
      Aims. We aim to study vertical settling and radial drift of dust in protoplanetary disks from a different perspective: an edge-on view. An estimation of the amplitude of settling and drift is highly relevant to understanding ...
    • Observations of gas flows inside a protoplanetary gap 
      Van der Plas, Gerrit; Pérez M., Sebastián; Dent, William R. F.; Fomalont, Ed; Hagelberg, Janis; Hales, Antonio; Jordán, Andrés; Mawet, Dimitri; Ménard, Francois; Wootten, Al; Wilner, David; Hughes, A. Meredith; Schreiber, Matthias R.; Girard, Julien H.; Ercolano, Bárbara; Canovas, Héctor; Román, Pablo E.; Casassus Montero, Simón; Salinas, Vachail (Nature Publishing Group, 2013-01-10)
      The formation of gaseous giant planets is thought to occur in the first few million years after stellar birth. Models1 predict that the process produces a deep gap in the dust component (shallower in the gas2, 3, 4). ...
    • The observed distribution of spectroscopic binaries from the Anglo-Australian Planet Search 
      Jenkins, James Stewart; Díaz, M.; Jones, H. R. A.; Butler, R. P.; Tinney, C. G.; O’Toole, S. J.; Carter, B. D.; Wittenmyer, R. A.; Pinfield, D. J. (Oxford University Press, 2015)
      We report the detection of sixteen binary systems from the Anglo-Australian Planet Search. Solutions to the radial velocity data indicate that the stars have companions orbiting with a wide range of masses, eccentricities ...
    • Observed emergence of the climate change signal: from the familiar to the unknown 
      Hawkins, E.; Frame, D.; Harrington, L.; Joshi, M.; King, A.; Rojas Corradi, María Heloísa; Sutton, R. (American Geophysical Union, 2020)
      Changes in climate are usually considered in terms of trends or differences over time. However, for many impacts requiring adaptation, it is the amplitude of the change relative to the local amplitude of climate variability ...
    • Observed type II supernova colours from the carnegie supernova project-I 
      De Jaeger, Thomas; Anderson, J. P.; Galbany, Lluis; González Gaitán, Santiago; Hamuy Wackenhut, Mario; Phillips, M. M.; Stritzinger, M. D.; Contreras, C.; Folatelli, Gastón; Gutiérrez, C. P.; Hsiao, E. Y.; Morrell, N.; Suntzeff, Nicholas B.; Dessart, L.; Filippenko, A. V. (Oxford University Press, 2018-06)
      We present a study of observed Type II supernova (SN II) colours using optical/near-infrared photometric data from the Carnegie Supernovae Project-I. We analyse four colours (B - V, u - g, g - r, and g - Y) and find that ...
    • Observing the linked depletion of dust and CO gas at 0.1–10 au in disks of intermediate-mass stars 
      Banzatti, A.; Garufi, A.; Kama, M.; Benisty, Myriam; Brittain, S.; Pontoppidan, K. M.; Rayner, J. (EDP Sciences, 2018)
      We report on the discovery of correlations between dust and CO gas tracers of the 0.1–10 au region in planet-forming disks around young intermediate-mass stars. The abundance of refractory elements on stellar photospheres ...
    • Occurrence and distribution of silver in the world-class Río Blanco Porphyry Cu-Mo deposit, central Chile 
      Crespo, Jorge; Reich Morales, Martín; Barra, Fernando; Verdugo, Juan José; Martínez, Claudio; Leisen, Mathieu; Romero, Rurik; Morata Céspedes, Diego; Marquardt, Carlos (Soc Economic Geologists, 2020)
      Porphyry Cu-Mo deposits (PCDs) are the world’s major source of Cu, Mo, and Re and are also a significant source of Au and Ag. Here we focus on the world-class Río Blanco PCD in the Andes of central Chile, where Ag is a ...
    • Ocean circulation along the southern Chile transition region (38°–46°S): Mean, seasonal and interannual ... 
      Strub, P. Ted; James, Corinne; Montecino, Vivian; Rutllant, José A.; Blanco, José Luis (Elsevier Ltd, 2019)
      © 2019 The AuthorsSatellite and atmospheric model fields are used to describe the wind forcing, surface ocean circulation, temperature and chlorophyll-a pigment concentrations along the coast of southern Chile in the ...
    • Ocean–Cloud–Atmosphere–Land Interactions in the Southeastern Pacific: The VOCALS Program 
      Mechoso, C. R.; Wood, R.; Weller, R.; Bretherton, C. S.; Clarke, A. D.; Coe, H.; Fairall, C.; Farrar, J. T.; Feingold, G.; Garreaud Salazar, René; Grados, C.; McWilliams, J.; De Szoeke, S. P.; Yuter, S. E.; Zuidema, P. (American Meteorological Society, 2014)
      The present paper describes the Variability of the American Monsoon Systems (VAMOS) Ocean–Cloud–Atmosphere–Land Study (VOCALS), an international research program focused on the improved understanding and modeling of the ...
    • Octadecylsilane-modified silicas prepared by grafting and sol-gel methods 
      Brambilla, Rodrigo; Pires, Gilvan P.; dos Santos, João H. Z.; Lacerda Miranda, Márcia S.; Chornik Aberbuch, Boris (ELSEVIER SCIENCE BV, 2007-05)
      Silica bearing octadecylsilane groups were synthesized by grafting and the sol–gel method. In the former, commercial silica was chemically modified with octadecyltrimethoxisilane (ODS), while in the latter, it was ...