A morphological description and CCD photometric information for a sample of 24 low luminosity radio galaxies with radio jets are presented. It is concluded that Fanaroff-Riley type I low luminosity radio galaxies inhabit regions of higher galaxy density than radio-quiet ellipticals and powerful radio sources, and are more luminous in the optical

Not Available

IAUC 5795 available at Central Bureau for Astronomical Telegrams. IAUC 5795 available at Central Bureau for Astronomical Telegrams.

Measurements of optical emission-line flux variations based on spectra of the Seyfert galaxy NGC 5548 obtained between December 1988 and October 1989 are reported. All of the measured optical emission lines, H-alpha, H-beta, H-gamma, He I 5876, and He II 4686, exhibit the same qualitative behavior as the UV and optical continua, but with short time

We derive effective temperatures, luminosities and related parameters for a sample of eight Wolf-Rayet stars - seven WN stars and a WO star - by computing elaborate photoionization models of their surrounding ring nebulae. The most recent non-LTE WR model atmospheres are used for the input stellar ionizing flux distributions. The photoionization

ACTUALMENTE, LA INFORMACION HELIOSISMOLOGICA QUE PUEDE OBTENERSE A PARTIR DE ESTACIONES UNICAS SOBRE LA SUPERFICIE TERRESTRE SE ENCUENTRA ANALIZADA HASTA EL LIMITE. LA COMUNIDAD CIENTIFICA ESTA CONVENCIDA DE QUE, PARA PROSEGUIR EL AVANCE EN ESTE CAMPO, ES NECESARIO DISPONER DE SERIES TEMPRALES LARGAS E ININTERRUMPIDAS DE OBSERVACIONES DE LAS