Browsing by Issue Date Facultad de Ciencias Físicas y Matemáticas

Now showing items 81-100 of 20545

    • Wet and dry deposition of nitrogen c ompounds in the southeast Pacific coast: Montemar, central Chile 
      Prado Fiedler, Roberto; Fuenzalida, Humberto A. (1996-10)
      A tmosphericco ncentratioinn them arineb oundarlya yera ndd irectd epositiomn easurements of totaln itratea nda mmoniumfo r an easternS outhP acificc oastasl iten earV alparaisoC, hile,w ere carriedo utd uringt hep eriodJ ...
    • Sensitivity of nucleon-nucleus scattering to the off-shell behavior of on-shell equivalent NN potentials 
      Arellano Sepúlveda, Hugo; Brieva Rodríguez, Francisco; Sander, M.; von Geramb, H. V. (1996-11)
      The sensitivity of nucleon-nucleus elastic scattering to the off-shell behavior of realistic nucleon-nucleon interactions is investigated when on-shell equivalent nucleon-nucleon potentials are used. The study is based on ...
    • Sensitivity of nuclean-nucleus scattering to the off-shell behavior of on-shell equivalent NN potentials 
      Arellano Sepúlveda, Hugo; Brieva Rodríguez, Francisco; Sander, M.; von Geramb, H. V. (AMERICAN PHYSICAL SOC, 1996-11)
      The sensitivity of nucleon-nucleus elastic scattering to the off-shell behavior of realistic nucleon-nucleon interactions is investigated when on-shell equivalent nucleon-nucleon potentials are used. The study is based on ...
    • The morphology of type Ia supernovae light curves 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Suntzeff, Nicholas B.; Schommer, Robert A.; Maza Sancho, José; Smith, R. C.; Lira Teillery, Paulina; Avilés, R. (1996-12)
      We present a family of six BVI template light curves for SNe Ia for days -5 and +80, based on high-quality data gathered at CTIO. These templates display a wide range of light-curve morphologies, with initial decline rates ...
    • The absolute luminosities of the Calan/Tololo type Ia supernovae 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Schommer, R. A.; Suntzeff, Nicholas B.; Maza Sancho, José; Avilés, Roberto (AMER INST PHYSICS, 1996-12)
      We examine the absolute luminosities of 29 SNe Ia in the Calan/Tololo survey. We confirm a relation between the peak luminosity of the SNe and the decline rate as measured by the light curve, as suggested by Phillips [ApJ, ...
    • Carbon Stars in the Large Magellanic Cloud: Luminosities, Colors, and Implications for the History of Star ... 
      Costa Hechenleitner, Edgardo; Frogel, Jay A. (1996-12)
      We present RI and JHK photometry for 888 and 204 carbon (C) stars, respectively, of the 1035 C stars found by Blanco and his collaborators in 52 fields of the Large Magellanic Cloud (LMC). The results of our analysis of ...
    • BVRI light curves for 29 type Ia supernovae 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Suntzeff, Nicholas B.; Schommer, R. A.; Maza Sancho, José; Antenaza, Roberto; Wischnjewsky, Marina; Valladares, Geraldo; Muena, César; González, L. E.; Avilés, R.; Wells, Lisa; Smith, R. C.; Navarrete, Mauricio; Covarrubias, Ricardo; Williger, G.; Walker, Alistair R.; Layden, A. C.; Elias, J. H.; Baldwin, J. A.; Hernández, Manuel; Tirado, Hernán; Ugarte, Patricio; Elston, R.; Saavedra, Nelson; Barrientos, Felipe; Costa Hechenleitner, Edgardo; Lira Teillery, Paulina; Ruiz González, María Teresa; Anguita, Claudio; Gómez, Ximena; Ortiz, P.; Della Valle, M.; Danziger, J.; Storm, J.; Kim, Y. C.; Bailyn, C.; Rubenstein, Eric P.; Tucker, D.; Cersosimo, S.; Méndez Bussard, René Alejandro; Siciliano, L.; Sherry, W.; Chaboyer, Brian; Koopmann, R. A.; Geisler, D.; Sarajedini, A.; Dey, Arjun; Tyson, N.; Rich, R. Michael; Gal, R.; Lamontagne, Robert; Caldwell, N.; Guhathakurta, Puragra; Phillips, A. C.; Szkody, P.; Prosser, C.; Ho, Luis C.; McMahan, R.; Baggley, G.; Cheng, K. P.; Havlen, R.; Wakamatsu, K.; Janes, Kenneth A.; Malkan, Mathew; Baganoff, F.; Seitzer, P.; Shara, M.; Sturch, C.; Hesser, J.; Hartigan, P.; Hughes, J.; Welch, D. L.; Williams, T. B.; Ferguson, H.; Francis, P. J.; French, L.; Bolte, M.; Roth, J.; Odewahn, S.; Howell, S.; Krzeminski, W. (American Astronomical Society, 1996-12)
      BV(RI)_KC_ light curves are presented for 27 type Ia supernovae discovered during the course of the Calan/Tololo Survey and for two other SNe Ia observed during the same period. Estimates of the maximum light magnitudes ...
    • BVRI light curves for 29 type Ia supernovae 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Suntzeff, Nicholas B.; Schommer, R. A.; Maza Sancho, José; Antenaza, Roberto; Wischnjewsky, Marina; Valladares, Geraldo; Muena, César; González, L. E.; Avilés, R.; Wells, Lisa; Smith, R. C.; Navarrete, Mauricio; Covarrubias, Ricardo; Williger, G.; Walker, Alistair R.; Layden, A. C.; Elias, J. H.; Baldwin, J. A.; Hernández, Manuel; Tirado, Hernán; Ugarte, Patricio; Elston, R.; Saavedra, Nelson; Barrientos, Felipe; Costa Hechenleitner, Edgardo; Lira Teillery, Paulina; Ruiz González, María Teresa; Anguita, Claudio; Gómez, Ximena; Ortiz Arce, Patricio; Della Valle, Massimo; Danziger, J.; Storm, J.; Kim, Y. C.; Bailyn, C.; Rubenstein, Eric P.; Tucker, D.; Cersosimo, S.; Méndez, R. A.; Siciliano, L.; Sherry, W.; Chaboyer, Brian; Koopmann, R. A.; Geisler, D.; Sarajedini, A.; Dey, Arjun; Tyson, N.; Rich, R. Michael; Gal, R.; Lamontagne, Robert; Caldwell, N.; Guhathakurta, Puragra; Phillips, A. C.; Szkody, P.; Prosser, C.; Ho, Luis C.; McMahan, R.; Baggley, G.; Cheng, K. P.; Havlen, R.; Wakamatsu, K.; Janes, Kenneth A.; Malkan, Mathew; Baganoff, F.; Seitzer, P.; Shara, M.; Sturch, C.; Hesser, J.; Hartigan, P.; Hughes, J.; Welch, D. L.; Williams, T. B.; Ferguson, H.; Francis, P. J.; French, L.; Bolte, M.; Roth, J.; Odewahn, S.; Howell, S.; Krzeminski, W. (American Astronomical Society, 1996-12)
      BV(RI)_KC_ light curves are presented for 27 type Ia supernovae discovered during the course of the Calan/Tololo Survey and for two other SNe Ia observed during the same period. Estimates of the maximum light magnitudes ...
    • The Hubble diagram of the Calan/Tololo type Ia supernovae and the value of H-0 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Suntzeff, Nicholas B.; Schommer, Robert A.; Maza Sancho, José; Avilés, R. (1996-12-06)
      The Calan/Tololo supernova survey has discovered similar to 30 type Ia supernovae at redshifts out to z similar to 0.1. Using BV(I)(KC) data for these objects and nearby SNe Ia, we have shown that there exists a significant ...
    • Southern ultraluminous infrared galaxies: An optical and infrared database 
      Duc, P. A.; Mirabel, I. F.; Maza Sancho, José (1997)
      We have carried out an optical and infrared study of 24 ultraluminous infrared galaxies in the southern hemisphere (SULIRGs). This flux limited, complete sample, has been extracted from the redshift survey of IRAS ...
    • Recent temperature variations in southern South America 
      Rosenbluth López, Benjamín; Fuenzalida Ponce, Humberto; Aceituno Gutiérrez, Patricio (1997)
      Results from a critical appraisal of surface mean air temperature in Chile and Argentina and extreme air temperature in Chile during the present century are presented. Observations were homogenized to produce a set of ...
    • Jurassic extensional tectono-magmatism and associated mineralization of the El Faldeo polymetallic district, ... 
      Parada Reyes, Miguel; Palacios Monasterio, Carlos; Lahsen Azar, Alfredo (1997)
      The El Faldeo is the southernmost Andean mineral district and consists of Paleozoic polymeta- morphic basement unconformably overlain by a 200 m thick homoclinal sequence of sedimentary and felsic volcanic beds of the ...
    • Hydrothermal-Electrochemical Formation of BaTiO, Films: Electrochemical Characterization of the Early Stages ... 
      Vargas Valero, Tomás; Díaz Toledo, Hugo; Silva, Carmen I.; Fuenzalida, Víctor M. (1997-01)
      The formation mechanism of BaTiO, films produced by a hydrothermal-electrochemical method was characterized using electrochemical techniques. Experiments were conducted in a three-electrode electrochemical cell, with ...
    • Faraday’s Instability for Viscous Fluids 
      Cerda, Enrique; Tirapegui Zurbano, Enrique (1997-02-03)
      We derive an exact equation which is nonlocal in time for the linear evolution of the surface of a viscous fluid, and show that this equation becomes local and of second order in an interesting limit. We use our local ...
    • Results of the ESO-SEST key programme: CO in the Magellanic Clouds VI. The 30 Doradus Complex 
      Kutner, M. L.; Rubio López, Mónica; Booth, Roy S.; Boulanger, Francois; Graauw, Th. de; Garay Brignardello, Guido; Israel, F.P.; Johansson, L.E.B.; Lequeux, J.; Nyman, L. A. (Editions Physique, 1997-04)
      We report observations of 12CO(1 ! 0) emission from molecular clouds in a complex extending 2 kpc south of 30 Dor in the Large Magellanic Cloud. The observations were taken on the Swedish-ESO Submillimetre Telescope ...
    • Optical astrometry of Benchmark radio sources IV. New results in the southern hemisphere 
      Costa Hechenleitner, Edgardo; Loyola, P. (1997-05-01)
      Optical positions relative to the International Reference Stars Catalogue (IRS), and therefore in the system of the FK5, have been obtained for the optical counterparts of 40 compact extragalactic radio sources south of ...
    • Alternation on cellular automata 
      Matamala Vásquez, Martín (ELSEVIER, 1997-06-10)
      In this paper we consider several notions of alternation in cellular automata: non-uniform, uniform and weak alternation. We study relations among these notions and with alternating Turing machines. It is proved that the ...
    • Ultraviolet and optical observations of HEN 1213, HEN 1341, and HEN 1761 
      Gutiérrez Moreno, A.; Moreno, H.; Costa Hechenleitner, Edgardo; Feibelman, W.A. (The American Astronomical Society, 1997-08-10)
      We present UV observations of the symbiotic stars Hen 1213, Hen 1341, and Hen 1761, made almost simultaneously with optical observations during 1995; previous optical observations were made during 1987 and 1991. The UV ...
    • A large scale CO survey of the Galactic center region 
      Bitrán, M.; Álvarez Moreno, Héctor Julio; Bronfman Aguiló, Leonardo; May Humeres, Jorge; Thaddeus, P. (1997-10)
      We present the data from a CO(J = 1 --> 0) survey of the central region of our Galaxy. The observations were obtained with the 1.2-m Southern Millimeter-wave Telescope at Cerro Tololo Interamerican Observatory, Chile. This ...
    • Homogenization of periodic structures via bloch decomposition 
      Conca Rosende, Carlos; Vanninathan, Muthusamy (1997-12)
      In this paper, the classical problem of homogenization of elliptic operators in arbitrary domains with periodically oscillating coe cients is considered. Using Bloch wave decomposition, a new proof of convergence is ...