Browsing by Issue Date Facultad de Ciencias Físicas y Matemáticas
Now showing items 41-60 of 20250
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(AMER INST PHYSICS, 1993-12)We have started a search for supernovae as a collaboration between the University of Chile and the Cerro Tololo Inter-American Observatory, with the aim of producing a moderately distant (0.01 < z < 0.10) sample of Type ...
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(AMER INST PHYSICS, 1993-12)
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(1994)Given a parametrised measure and a family of continuous functions (<pn), we construct a sequence of functions (uk) such that, as fc-> co, the functions fn(uk) converge to the corresponding moments of the measure, in the ...
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(AMER INST PHYSICS, 1994-04)We present photometry and spectroscopy of SN 1992am for five months following its discovery by the Calan/CTIO SN search. These data show SN 1992am to be type II-P, displaying hydrogen in its spectrum and the typical shoulder ...
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(UNIV CHICAGO PRESS, 1994-04-01)Based on the two best-observed Type Ia supernovae found in the Calan/Tololo Supernova Search, in this Letter we present convincing evidence that Type la supernovae with a fast rate of decline in the B band are intrinsically ...
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(1994-04-18)The simplest interaction between sound and quantized superfluid vortices is investigated both analytically in the Born approximation and numerically, using the nonlinear Schrodinger equation. Compared with the scattering ...
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(1994-06-10)Optical and spectrophotometric ata, gathered in the 1987-1994 interval, are presented for the planetary nebula N66 (WS 35 or SMP 83) in the Large Magellanic Cloud. These data show that the central star has suffered dramatic ...
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(1994-07-01)We present H92alpha radio recombination line and radio continuum observations toward three cometary-like H II regions, G13.87 + 0.28, G32.80 + 0.19B, and G61.48 + 0.09B1, with an angular resolution of approximately 2''. ...
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(UNIV CHICAGO PRESS, 1994-07-20)At angular resolution of approximately 1 arc second(s) the Cepheus A East Radio source is known to consist of 16 compact components clustered within a 25 arc second(s) radius region, most of which are aligned in stringlike ...
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(UNIV CHICAGO PRESS, 1994-09-01)We have used observations gathered at CTIO to measure distances by the expanding photosphere method (EPM) to five Type II supernovae. These supernovae lie at redshifts from cz = 1100 km s-1 to cz - 5500 km s-1, and increase ...
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(1994-11)We investigate the role of the full dynamical dependence of the free off-shell nucleon-nucleon t matrix on the optical potential for proton-nucleus elastic scattering in the 100—400 MeV incident energy range within a ...
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(1994-12)We present spectroscopic and photometric data for SN 1992K, a Type Ia event found in the course of the Calan/Tololo supernova survey. These data show an impressive similarity with the spectra and light curves of the atypical ...
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(1995)The crystal structure of the title phosphonium salt consists of a tetrahedral (C6Hs)P +C(C4HS)- (COOCH2CH3) cation and a Br- anion. The triphenylphosphonium group has P---C(phenyl) distances which are equal within ...
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(1995-01)We have constructed Hubble diagrams in B and V for 13 Type Ia supernovae (SNe Ia) found in the course of the Calan/Tololo survey covering an unprecedented range in redshift (0.01 less than Z less than 0.1). As opposed to ...
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(1995-03-01)Optical and UV spectrophotometric data for the planetary nebula N66 in the Large Magellanic Cloud gathered in the 1987-1994 interval are analyzed. The central star, which had a featureless weak continuum, has developed ...
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(AMERICAN PHYSICAL SOC, 1995-07)We develop an approach for incorporating both medium and off-shell effects in the calculation of full-folding nucleon-nucleus optical potentials for elastic scattering. The approach is based on a flexible scheme for ...
