We present an objective and automated procedure for detecting clusters of galaxies in imaging galaxy surveys. Our Voronoi Galaxy Cluster Finder (VGCF) uses...

Mircea Eliade (1992) argued that a single view of the starry celestial vault would be sufficient to awake a religious experience. This idea is as true today as...

The Astrophysics Institute of the Canaries (IAC) studies the Galaxy's hidden centre from the Teide Observatory, Tenerife.

White dwarfs (WD) with main-sequence (MS) companions are crucial probes of stellar evolution. However, due to the significant difference in their luminosities...

A photometric analysis of the sub-structure of a granular light bridge in a large solar pore is performed. The data consist of a 66 min time series of white...

Context. Sigma Orionis is an open cluster in the nearest giant star formation site - Orion. Its youth (3−5 Myr), low reddening, and relative vicinity make it an...

Spectral observations of the 639.361-nm FeI line at the center of the quiet solar disk with high spatial (0.4″) and temporal (10 s) resolution are used to...

Context. Plages are small concentrations of strong, nearly vertical magnetic fields in the solar photosphere that expand with height. A high spatial and...

Stellar population studies provide unique clues to constrain galaxy formation models. So far, detailed studies based on absorption line strengths have mainly...