With the main goal of investigating the AGN and/or Starburst nature of LINERs, we have studied their FIR properties. Based on the classical indicators of Star Formation activity S25/S100 and the S60/S100 ratios, we have confirmed their heterogeous nature and they can be separated in three groups: normal spiral galaxies with low level nuclear star

We have obtained Keck spectra for 16 globular clusters (GCs) associated with the merger remnant elliptical NGC 1052, as well as a long-slit spectrum of the galaxy. We derive ages, metallicities and abundance ratios from simple stellar population models using the recently published methods of Proctor & Sansom, applied to extragalactic GCs for the

The high-frequency spectrum above the acoustic cutoff frequency (νac) of the solar atmosphere has been observed in velocity measurements at low and high angular degrees and reveals significant evidence for the presence of pseudomodes characterized by their equally spaced signal. In this paper we study this region of the spectra using for the first

The first table (dataset1) contains 1590 data points collected with 1.5m telescopes equipped with conventional photometers at the observatories of San Pedro Martir, (OAN, Mexico) and Sierra Nevada, (OSN, Spain) at the following epochs: February 4-17 2002, January 8-14 2003 and March 17-19 2004 (Data Set 1). The data consist of differential

Eleven models of Galactic chemical evolution, differing in the carbon, nitrogen, and oxygen yields adopted, have been computed to reproduce the Galactic O/H values obtained from H II regions. All the models fit the oxygen gradient, but only two models also fit the carbon gradient, those based on carbon yields that increase with metallicity owing to

BS Ind (=HD 202947) is a young K0V star in the Tucana association. Photometric observations with the Hipparcos satellite show an eclipse-like light-curve with primary and secondary eclipse. The eclipsing binary has a period of 0.435338 days and a circular orbit. Our spectroscopic observations however show that the K0V primary is a single-line