When the polarimetric sensitivity and the angular resolution exceed a threshold, magnetic fields show up almost everywhere on the solar surface. Here I revise...
The MASCARA and bRing photometric monitoring networks
The MASCARA/bRing network consists of four separate observatories, located in La Palma, La Silla, Sutherland, and Siding Springs, and searches for exoplanet...
The mass and helium discrepancy in massive stars: the case VELA X-1
A NLTE-analysis is presented of high S/N spectra of the optical component of the standard massive X-ray binary Vela X-1. In combination with the orbital...
The mass and helium discrepancy in massive stars: the case Vela X-1.
A NLTE-analysis is presented of high S/N spectra of the optical component of the standard massive X-ray binary Vela X-1. In combination with the orbital...
The mass content of the Sculptor dwarf spheroidal galaxy
We present a new determination of the mass content of the Sculptor dwarf spheroidal galaxy, based on a novel approach which takes into account the two distinct...