Browsing by Issue Date Facultad de Ciencias Físicas y Matemáticas

Now showing items 21-40 of 20282

    • A complete CO survey of the Large Magellanic Cloud 
      Cohen, R. S.; Dame, T. M.; Garay Brignardello, Guido; Montani, J.; Rubio López, Mónica; Thaddeus, P. (1988-08-15)
      A complete CO survey of the central 6 deg x 6 deg of the LMC was performed in order to determine the distribution of molecular clouds. At least 10 percent of the region studied exhibits CO line emission, with peak line ...
    • The distance to NGC 6302 
      Gómez, Yolanda; Moran, James M.; Rodríguez, Luis F.; Garay Brignardello, Guido (The American Astronomical Society, 1988-10-15)
      New 6 cm continuum and radio recombination line VLA observations as well as CO observations are presented of the bright PN NGC 6302. The H110-alpha line is significantly broader than the H76-alpha line, an effect which is ...
    • SPECTROPHOTOMETRY OF THE NEW COMMON-PROPER-MOTION PAIR ESO 440-55A/55B 
      Ruiz González, María Teresa; Maza Sancho, José (AMER INST PHYSICS, 1988-12)
    • UBVRI photoelectric photometry in the fields of 15 active galaxies 
      Hamuy Wackenhut, Mario; Maza Sancho, José (The Astronomical journal, 97: 720-725, 1989, 1989-03)
      UVBRI photoelectric sequences for fifteen AGNs were obtained with 0.6, 0.9, and 1-m telescopes. The data include 473 observations for 118 stars, giving an average of 4.0 observations per star, and 7.9 stars per sequence. ...
    • The Orion-KL super water maser 
      Garay Brignardello, Guido; Moran, J. M.; Haschick, A. D. (1989-03-01)
      The most powerful water maser feature ever seen in Orion was monitored for seven years. The maser reached a peak flux density of about 6.7 x 10 to the 6th Jy. The total radiated energy between August 1979 and June 1987 was ...
    • On the Functioning of the Southern Oscillation in the South American Sector. Part II: Upper-Air Circulation 
      Aceituno Gutiérrez, Patricio (AMER METEOROLOGICAL SOC, 1989-04)
      The functioning of the Southern Oscillation (SO) in the South American sector is analyzed with particular emphasis on the upper-air circulation anomalies. Throughout the year, but especially during austral summer, the ...
    • Large proper motions in the remarkable triple radio source in Serpens 
      Rodríguez, L. F.; Curiel, S.; Moran, J. M.; Mirabel, I. F.; Roth, M.; Garay Brignardello, Guido (UNIV CHICAGO PRESS, 1989-11-15)
      The triple radio source in the Serpens star formation region consists of a central object and two lobes with spectral indices characteristic of nonthermal emission. Measurements made at the Arecibo Observatory and the VLA ...
    • Nonrelativistic full-folding model of nucleon elastic scattering at intermediate energies 
      Arellano Sepúlveda, Hugo; Brieva Rodríguez, Francisco; Love, W. G. (1990)
      Nonrelativistic full-folding optical model potentials for nucleon elastic scattering have been calculated and applied to proton scattering on ' 0 and Ca at energies between 135 and 500 MeV. The optical potentials were ...
    • Interaction of Defects in Two-Dimensional Systems 
      Rica Mery, Sergio; Tirapegui Zurbano, Enrique (American Physical Society, 1990-02-19)
      We derive equations of motion for a diluted gas of spiral defects in the two-dimensional complex Ginzburg-Landau equation. The interaction of two defects is treated and our predictions agree with a recent numerical experiment.
    • Prewhitening of climatological time-series 
      Fuenzalida Ponce, Humberto; Rosenblüth López, Benjamín (1990-03)
      The most common procedures to prewhite a climatological time series are considered and compared with those based on Fourier analysis. In particular, advantages and shortcomings of the anomaly method and the seasonal ...
    • PROPER-MOTION SURVEY .1. COMMON-PROPER-MOTION SYSTEMS IN ESO AREAS 439 AND 440 
      Ruiz González, María Teresa; Maza Sancho, José (AMER INST PHYSICS, 1990-03)
    • Role of nuclear densities in nucleon elastic scattering 
      Arellano Sepúlveda, Hugo; Brieva Rodríguez, Francisco; Love, W. G. (1990-08)
      A framework based on a full-folding model of the nucleon optical potential is presented for studying nuclear densities of closed-shell nuclei using intermediate energy nucleon scattering. Using a density-matrix expansion ...
    • ENERGY-DISTRIBUTION OF LOW-LUMINOSITY STARS 
      Ruiz González, María Teresa; Anguita, Claudio; Maza Sancho, José; Roth, Miguel (AMER INST PHYSICS, 1990-10)
    • The compact molecular core toward G34.3 + 0.2 - VLA observations in the (2,2) and (3,3) lines of ammonia 
      Garay Brignardello, Guido; Rodríguez, Luis F. (1990-10-10)
      The VLA was used to map the NH3 emission in the lines of the (J,K) = (2,2) and (J,K) = (3,3) inversion transitions toward the warm molecular cloud associated with the compact H II region G34.3 + 0.2. The main HF line of ...
    • The optical light curves of SN 1980N and SN 1981D in NGC 1316 (Fornax A) 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Maza Sancho, José; Wischnjewsky, Marina; Uomoto, Alan; Landolt, Arlo U.; Khatwani, Rani (1991)
      We present optical photometry of the two supernovae, 1980N and 1981D, which appeared in the peculiar D-type galaxy NGC 1316 (Fornax A). These data are combined with published observations to produce definitive optical light ...
    • A (C-12)O survey of the Small Magellanic Cloud 
      Rubio López, Mónica; Garay Brignardello, Guido; Montani, J.; Thaddeus, P. (1991-02-10)
      The central 2 arcsec x 2 arcsec region of the SMC has been fully surveyed to search for (C-12)O emission in the J = 1-0 transition. (C-12)O emission from two large complexes located in the southwest and northeast regions ...
    • Comparison of nucleon-nucleon potential models in a full-folding description of elastic scattering 
      Arellano Sepúlveda, Hugo; Brieva Rodríguez, Francisco; Love, W. G.; Nakayama, K. (1991-04)
      The sensitivity of proton-nucleus elastic scattering to different nucleon-nucleon effective interactions is studied within the framework of the nonrelativistic full-folding model. Calculations of the nucleon-nucleus ...
    • Multifrequency VLA observations of radio continuum from IRAS 16293-2422 
      Estalella, R.; Anglada Escudé, Guillem; Rodríguez, L. F.; Garay Brignardello, Guido (1991-04-20)
      Using the VLA at 20, 6, 2, and 1.3 cm, we observed the cold infrared source IRAS 16293-2422. Our data allow a determination of the spectral indices of the components A and B. IRAS 16293-2422A, which is known from higher ...
    • Starting energy dependence of elastic scattering observables in a full-folding model 
      Arellano Sepúlveda, Hugo; Love, W. G.; Brieva Rodríguez, Francisco (1991-06)
      Full-folding model calculations of proton elastic scattering at intermediate energy made using the free off-shell NNt matrix and including the variation of the energy in the NN center of mass as prescribed by the ...
    • The dense molecular envelope around the compact H II region G5.89 - 0.39 (W28 A2) 
      Gómez, Yolanda; Rodríguez, Luis F.; Garay Brignardello, Guido; Moran, James M. (The American Astronomical Society, 1991-08-20)
      VLA observations of ammonia in the (J, K) = (2, 2) and (3, 3) inversion transitions toward the compact H II region G5.89 - 0.39 are presented. These observations reveal the presence of a massive and hot molecular envelope ...