The authors report photoelectric and CCD photometry of V651 Mon, the central star of the planetary nebula NGC 2346, made in April - May and November, 1992. During each of these two epochs an occultation was measured, of amplitude 0.20 and 0.35 in the observed V magnitude, in accordance with previous results. These variations may be interpreted in

UTILIZANDO ESPECTROS DE ALTA RESOLUCION (LAMDA/INCREMENTO LAMDA = 810 ELEVADO A 4) DE LA LINEA KI DE ABSORCION INTERESTELAR, SE ESTUDIAN LAS NUBES FRIAS (T = 100 K) DEL MEDIO INTERESTELAR LOCAL (MIL). SE ESTIMAN DISTANCIAS, TAMAÑOS, DENSIDADES, TEMPERATURAS Y MASAS DE LAS NUBES. UNA DE LAS NUBES, SITUADA EN PERSEO, SE ESTUDIA MAS DETALLADAMENTE CON

The velocity field of the central parts of the elliptical galaxy NGC 7626 has been mapped by obtaining high resolution curves and velocity dispersion profiles for four slit position angles along the major, minor and two intermediate photometric axes. Each rotation curve and dispersion profile shows a high level of structure. Along the major axis

We present the results of a multi-site photometric campaign to monitor T Tauri stars in the Taurus-Auriga stellar formation region. The campaign - dubbed COYOTES, for Coordinated Observations of Young Stellar ObjecTs from Earthbound Sites - yielded UBVRI magnitudes of 13 classical T Tauri stars, 10 weak-line T Tauri stars, and one suspected Ae

The Starburst model for radio-quiet Active Galactic Nuclei (AGN) postulates that the activity seen in most AGN is powered solely by young stars and compact supernova remnants (cSNR) in a burst of star formation at the time when the metal rich core of the spheroid of a normal early type galaxy was formed. In this model, the broad permitted lines

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