Accretion of minor satellites has been postulated as the most likely mechanism to explain the significant size evolution of the massive galaxies over cosmic time. A direct way of probing this scenario is to measure the frequency of satellites around massive galaxies at different redshifts. In this contribution, I present the study that we have

We present the Seyfert and star formation Activity in the Far-InfraRed (SAFIR) project, a small (15.1 h) Herschel guaranteed time proposal performing PACS and SPIRE imaging of a small sample of nearby Seyfert galaxies. This project is aimed at studying the physical nature of the nuclear IR emission by means of multi-component spectral energy

The global Hands-on Universe association is producing and distributing free resources world-wide to implement Inquire Based Scientific Education (IBSE) at secondary and high school levels. The materials are inspired in astronomical research and space exploration. The association is implementing the Galileo Teacher Training Program world-wide. In

The mid-infrared camera and spectrograph CanariCam is one of the first light instruments to be operative at GTC. To exploit the CanariCam guaranteed observing time, the PIRATAS team was formed. The PIRATAS team has 100 hours of guarantee time to do imaging and spectroscopy of active galactic nuclei (AGN). We have developed the pipeline RedCan to

We present optical spectroscopy of the nearest quasar pair listed in the 13th edition of the Véron-Cetty & Véron catalogue, i.e. the two quasars SDSS J15244+3032 and RXS J15244+3032 (redshift z≈0.27, angular separation Δ θ≈7″, and line-of-sight velocity difference ΔV≈1900 km/s). This system would be an optimal candidate to investigate the mutual

We present near-infrared (NIR) spectroscopic observations of 28 X-ray and mid-infrared sources at a median redshift of z˜0.8 in the Extended Groth Strip (EGS). To date this is the largest compilation of NIR spectra of active galactic nuclei (AGN) at this redshift. The data were obtained using the multi-object spectroscopic mode of the Long-slit