Three of the best determinations of the primordial helium abundance (Yp) are those obtained from low metallicity HII regions by Aver, Olive, Porter, & Skillman...
We are reporting the updates in version 0.2.0 of the Automated SpectroPhotometric REDuction (ASPIRED) pipeline, designed for common use on different instruments...
An upper limit to the Beryllium abundance in the population 2 star HD 140283 from a high resoluion IUE spectrum
An IUE archive spectrum of HD 140283 has been analyzed in the region of the 3131 Å 9Be II resonance doublet. Close comparison of the observed and synthetic...
An UXor among FUors: extinction-related brightness variations of the young eruptive star V582 Aur
The early evolution of Sun-like stars may be interspersed by energetic FU Orionis (FUor) type accretion outbursts. We analysed eight years of photometric and...
An X-ray survey of extragalactic radio jets with Chandra
We are performing a survey of a sample of 17 radio jets with Chandra and HST, with the aim of finding their X-ray and optical counterparts. In this paper, we...
An XMM-Newton view of a small sample of Seyfert, 1 Galaxies
We present a detailed analysis of all the X-ray data taken by the XMM-Newton satellite of a small sample of five Seyfert 1 galaxies: ESO 359-G19, HE 1143-1810...
Análisis sismológico de las estrellas pulsantes tipo Delta Scuti del cúmulo de las Pléyades
The seismological analysis of Delta Scuti stars give us precise information on the stellar structure in intermediate mass stars, that is between 1.5 and 2.5...
Analyse multi-echelle des champs magnetiques dans des nuages moleculaires a structures filamentaires
Together with other observational methods, visible and near infra-red polarimetry can help to understand the morphology of magnetic fields in the neighborhood...