The effect of scattering by dust internal to H II regions on their spectral characteristics has been studied on the basis of simple analytical models, for...

Study of a sample of late-B fast rotators revealed narrow absorptions of C IV and Si IV in the direction of 6 stars within 200 pc of the Sun. The features are...

Abstract image available at: http://adsabs.harvard.edu/abs/1977A&A....60..109S

Relations are presently established among T(eff), colors, and metallicity for a sample of Population I and II F and G main-sequence stars whose physical...

A grid of evolutionary synthesis models for different scenarios (initial mass function slope, metallicity, age, etc.) and computing a set of observables in a...

A model of the galactic stellar distribution has been developed and the surface stellar densities in the near infrared are compared with observations along the...

NGC 2841 has been mapped in the J and K near-infrared bands out to some 10 kpc from its center. Maps and radial profiles in micron(J), micron(K) and J-K are...

Four radial profiles of M 31 in the near infrared taken with the 1.5 m infrared telescope of the Observatorio del Teide, Tenerife are presented. Three of these...

Synthetic horizontal branch (HB) stars in globular clusters, when computed on the basis of HB evolutionary tracks and pulsation theory constraints, furnish the...