According to unified schemes for blazars, BL Lac objects are dominated by relativistic jets pointing along the line of sight. Their plane-of-the-sky...
HST-NICMOS Observations of Galactic Bulges: Red Nuclei in Nearby Galaxies
We describe multi-color observations with NICMOS and WFPC2 of 20 nuclei of nearby galactic bulges of types S0-Sbc. We find that the centers of 19 out of 20...
HST/NICMOS Photometry of M31's Bulge and Metal-Rich Globular Clusters
We have obtained JHK images of 5 bulge fields and 5 metal-rich globular clusters in M31 with the NICMOS camera NIC2 on the Hubble Space Telescope. The globulars...
Hunting Exoplanets with Single-Mode Optical Interferometry
The GRAVITY instrument was primarily conceived for imaging and astrometry of the Galactic centre. However, its sensitivity and astrometric capabilities have...
Hunting for binary central stars of planetary nebulae: exploiting archival data
The detection of new binary central stars of planetary nebulae is crucial to definitively determine the importance of binary interactions in the nebular...
The refinement of the brown dwarf binary fraction may contribute to the understanding of the substellar formation mechanisms. Peculiar brown dwarf spectra or...
Hunting for eclipsing Post Common Envelope Binaries from SDSS
We give an overview of a project aiming to identify new eclipsing post common envelope binaries from the Sloan Digital Sky Survey. This work focuses on the...
We are undertaking an ambitious proper motion survey of massive stars in the 30 Doradus region of the Large Magellanic Cloud using the unique capabilities of...