My main field of research is the investigation of the parsec-scale relativistic jets in AGNs, radio supernovae and supernova factories in Starburst Galaxies, using high angular resolution and high sensitivity interferometric observations. Radio interferometers provide unique information because of its sharp angular resolution and its ability to observe phenomena or objects not detectable at other wavelengths. I am a recognized expert in multi-frequency, polarimetric VLBI observations of the relativistic jets. These images provide unsurpassed high angular resolution images from which we can obtain unique information about the physics of the jets: the jet structure, the presence of shocks and/or instabilities along the jets, the regions of particle acceleration and the magnetic-field structure, among others. I am also a well known expert in the study of the time evolution and expansion of young radio supernovae making use of the VLBI techniques and the study of the supernova factories and the AGN-starburst connection in Starburst Galaxies. Among the most relevant results obtained so far, we could mention: the discovery of the shell structure in SN 1993J, the study of its expansion and the detection of a wavelength-dependent effect in the evolution of the inner opacity; the discovery of very highly extinguished supernovae in distant LIRGs at radio and near-infrared wavelengths; eVLBI Monitoring of the LIRG galaxy Arp 299 and discovery of a “radio” supernova factory in their central 200 pc; the study of the interaction of a stationary and a moving component in the parsec-scale relativistic jet of 4C 39.25; and the detection of precession in the relativistic jet of M81*.

During the last years, we have actively used interferometric techniques in the Near Infrared to study different aspects of the physics of massive stars: multiplicity, formation, interaction of the winds with the ISM. The combination of radio and NIR high angular resolution and high sensitivity techniques can be extremely productive in the near future,

I belong to the Radio Continuum Working Group of the Square Kilometer Array. Within the group, I am contributing to the definition of the SKA Science Case (Key Science Projects). We are preparing ourselves to make the best scientific use of SKA through the use of the precursors (MeerKAT, LOFAR, eEVN …) in the fields of research in which we are experts: Nearby Galaxies; Radio Supernovae; AGN Relativistic Jets.