Statistical techniques are devised to assess the likelihood of a Poisson sample of points in two and three dimensions, containing specific filamentary...

We present a general procedure for obtaining the present density fluctuation probability distribution given the statistics of the initial conditions. The main...

The gravitationally lensed quasar J014516.6-094517 at z = 2.719 has been observed with the ESPRESSO instrument at the ESO VLT to obtain high-fidelity spectra of...

Large-scale magnetic fields reveal themselves through diffuse synchrotron sources observed in galaxy clusters such as radio halos. Total intensity filaments of...

We present VR observations of QSO 2237+0305 conducted by the Gravitational Lensing International Time Project collaboration from 1999 October 1 to 2000 February...

Spectroscopy and deep imaging of the group NEQ3 are presented. This system is formed by three compact objects with relative separations of ~2.6" and ~2.8" and a...

We have developed COSMOPACK, a set of tools that transform images of real galaxies to depict their appearance at a given redshift as observed with a given...

We report the detection, with a high level of confidence, of coherent outflows around voids found in the seventh data release of the Sloan Digital Sky Survey...

We study the dependence of the number density and properties of quasars on the background galaxy density using the currently largest spectroscopic data sets of...