Browsing by Issue Date Facultad de Ciencias Físicas y Matemáticas
Now showing items 141-160 of 22095
-
(Universidad de Chile, 1999)
-
(UNIV CHICAGO PRESS, 1999-01-01)We have obtained new Tully-Fisher (TF) peculiar velocity measurements for 52 Abell galaxy clusters distributed throughout the sky between similar to 50 and 200 h(-1) Mpc. The measurements are based on 1-band photometry and ...
-
(1999-03)We present the UBV (RI) light curves of the Type Ia supernova SN 1998bu, which appeared in the nearby galaxy M96 (NGC K3C368). M96 is a spiral galaxy in the Leo I group that has a Cepheid-based distance. Our photometry ...
-
(UNIV CHICAGO PRESS, 1999-03-01)We apply a simple statistical method to estimating the completeness of quasar surveys. It requires that an area has been covered by two or more, preferably different, selection techniques. We use three suitable data sets ...
-
(1999-03-20)j\3.4 mm toward the Cepheus A East star-forming region. The HCO` line shows emission up to velocities of D50 km s~1 relative to the ambient cloud velocity. The spatial distribution of the highvelocity gas is bipolar, ...
-
(The Astronomical Society of the Pacific, 1999-05)Observations of a group of S-type symbiotic stars are presented : Hen 828, Hen 905, Hen 1103, Hen 1213, KX TrA (Cn 1-2), AE Ara (PC 18), AS 255, AS 270, AS 289, Y CrA, AS 304, AS 316, AS 327, and CD [43¡14304. The ...
-
(1999-09)Cloud environment is thought to play a critical role in determining the mechanism of formation of massive stars. In this contribution we review the physical characteristics of the environment around recently formed massive ...
-
(1999-10)We develop a method for estimating the host galaxy dust extinction for type Ia supernovae based on an observational coincidence Ðrst noted by Lira, who found that the B[V evolution during the period from 30 to 90 days ...
-
(1999-10)We report the discovery and ground-based observations of the new gravitational lens CTQ 414. The source quasar lies at a redshift of z\1.29 with a B magnitude of 17.6. Ground-based optical imaging reveals two point sources ...
-
(UNIV CHICAGO PRESS, 1999-10)We have obtained I-band Tully-Fisher (T-F) measurements for 522 late-type galaxies in the fields of 52 rich Abell clusters distributed throughout the sky between similar to 50 and 200 h(-1) Mpc. Here we estimate corrections ...
-
(1999-10-01)Observations with a four-channel UV radiometer in Santiago, Chile (33.5øS, 70.6øW) from January 1992 to December 1998 are presented. Chinreels are centered at 305, 320, 340 and 380 nm with a 10 nm bandwidth. Measurements were ...
-
(1999-10-02)Optical positions relative to the Hipparcos Catalogue (ESA 1997) have been obtained for the optical counterparts of 15 faint (B 20 − 23) southern compact extragalactic radio sources (CERS). Most of these sources are ...
-
(BLACKWELL SCIENCE LTD, 1999-10-11)We present the spectra and redshifts of 62 quasars, from observations made with the Cerro Tololo Inter-American Observatory (CTIO) 4-m Blanco Telescope. These quasars form part of a total sample of 118 (with 56 having been ...
-
(E D P SCIENCES, 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, 1999-11)We present infrared imaging data in the J and K0 bands obtained for 18 active spiral galaxies, together with 11 non active galaxies taken as a control sample. All of them were chosen to satisfy well de ned isolation ...
-
(UNIV CHICAGO PRESS, 1999-11-01)Zehavi et al. have suggested that the Hubble flow within 70 h(-1) Mpc may be accelerated by the existence of a void centered on the Local Group. Its underdensity would be similar to 20%, which would result in a local Hubble ...
-
(1999-11-08)We describe the two generic instabilities which arise in quasireversible systems and show that their normal forms are the well-known real Lorenz equations and the Maxwell-Bloch equations. We present for the first time ...
-
(JOHN WILEY, 1999-11-30)A model representing the vibrations of a coupled fluid-solid structure is considered. This structure consists of a tube bundle immersed in a slightly compressible fluid. Assuming periodic distribution of tubes, this article ...
-
(2000)Synoptic-scale incursions of midlatitude air moving into subtropical South America (to the east of the Andes Cordillera) are observed to occur year-round with a periodicity of about 1–2 weeks. During wintertime, they have ...
-
(Elsevier, 2000)A method for fast nucleotide sequencing is described. It is based in the selection of well-known small oligomers able to be hybridized with the unknown target. The selected oligomers are afterwards ordered following a ...
-
(Churchill Livingstone, 2000)A new cryptology that uses biomolecules as carriers of hidden information is described here. The huge dimension of biopolymers permits the insertion there of private messages and the rapidity and specificity of biomolecular ...
