Now showing items 21-40 of 17703

    • 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 ...
    • 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 ...
    • 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 ...
    • 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.
    • Ruiz González, María Teresa; Maza Sancho, José (AMER INST PHYSICS, 1990-03)
    • 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 ...
    • 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 ...
    • Ruiz González, María Teresa; Anguita, Claudio; Maza Sancho, José; Roth, Miguel (AMER INST PHYSICS, 1990-10)
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • Méndez Bussard, René Alejandro; Ruiz González, María Teresa; Maza Sancho, José; Wischnjewsky, M. (1992-03)
      We analyze the results of a proper motion survey in a couple of ESO R 5° X 5° fields, finding evidence for faint (and primarily red) members of the Hyades and UMa moving groups. By the velocity ellipsoid of the Hyades and ...
    • MacConnell, D. Jack; Wing, Robert F.; Costa Hechenleitner, Edgardo (American Astronomical Society, 1992-08)
      A detailed description of a continuing survey for distant, cool supergiants near the Galactic plane in the southern hemisphere is presented. Candidate stars are found on near-IR objective-prism plates, and confirming ...
    • Conca Rosende, Carlos; Puschmann, Heinrich (1993)
      we consider a quadratic eigenvalue problem such that the second order term is a Hermitian matrix of rank r, the linear term is the identity matrix, and the constant term is an arbitrary Hermitian matrix A E cnn. Of the ...
    • Leibundgut, Bruno; Kirshner, Robert P.; Phillips, Mark M.; Wells, Lisa A.; Suntzeff, Nicholas B.; Hamuy Wackenhut, Mario; Schommer, R. A.; Walker, A. R.; Gonzalez, L.; Ugarte, P.; Williams, R. E.; Williger, G.; Gómez, Mercedes; Marzke, Ronald; Schmidt, Brian P.; Whitney, Barbara; Coldwell, Nelson; Peters, J.; Chaffee, F. H.; Foltz, Craig B.; Rehner, D.; Siciliano, L.; Barnes, T. G.; Cheng, K. P.; Hintzen, P. M. N.; Kim, Y. C.; Maza Sancho, José; Parker, J. Wm.; Porter, A. C.; Schmidtke, P. C.; Sonneborn, George (American Astronomical Society, 1993-01)
      We present 13 spectra and 31 photometric observations covering the first 150 days of SN 1991bg in NGC 4374 (M 84). Although SN 1991bg was a type Ia supernova displaying the characteristic Si II absorption at 6150 angstrom ...
    • Garay Brignardello, Guido; Moran, James M.; Rodríguez, Luis F. (1993-08-20)
      We present observations of the (2, 2) and (3, 3) inversion transitions of ammonia toward a group of compact H II regions near l = 10-degrees.5, b = 0-degrees.0, made at 4'' resolution using the VLA. We detected three ...