We present our first attempt to model a new metallicity indicator for old and intermediate aged stellar populations on the basis of the Mg[b] absorption index at λ ˜ 5175 Å. Model spectra of stellar populations are convolved with the responses of the Tunable Filters of OSIRIS-GTC to provide a photometric index matching the spectroscopic Mg[b]. The

The complete catalogue of Wolf-Rayet (W-R) stars was used to search for new IRAS structures, traced by HiRes maps. The dust temperature was computed in all the fields. Different morphologies and temperature gradients around the stars were noted. Although these results should be considered as preliminary, they illustrate the relationship between

In this paper we discuss the detection of Ly α galaxies at 4.6 ≳ z ≳ 6.6 within the OTELO survey. We estimate the expected number of objects that will be found in this survey.

We propose to use the OSIRIS tunable filters to perform for the first time a systematic study of the environment of Radio Loud and Radio Quiet quasars in windows around a large range of redshifts (z ~ 2 to 4). The aim of our study is (1) to search for the presence of forming clusters of galaxies around quasars, through Ly α emitters, which in turn

Over the past half century, astronomers have identified on the order of 2000 Very Metal Poor (VMP) stars with [Fe/H] -2.0, and a few hundred Extremely Metal Poor (EMP) stars with [Fe/H] -3.0, primarily from two large objective prism surveys, the HK survey of Beers and collaborators and the Hamburg/ESO Survey of Christlieb and colleagues. High

We review several experiments in ionospheric modification performed at the HAARP facility. Many of these experiments have been done in bistatic configuration with the WAVES receiver on the NASA/WIND satellite, including study of scintillation-like variations in low frequency propagation through the earth's ionosphere and magnetosphere. The