Abstract: The origin of almost all space weather related phenomenology is the large scale solar magnetic field. In this talk I'll speak about the dynamo mechanism that is operating in the solar interior and generating this large scale field and how it is modeled. I'll briefly review the classical mean-field dynamo theoretical framework usually used to tackle this problem and how observational constraints modified it over the years. I'll highlight its achievements and problems. Than I'll introduce a more recent and complementary modelling approach: 3D MHD simulations of solar convection. These simulations only recently started to exhibit solar-like features paving the way to virtual laboratories of the Sun. The results presented in this talk are based on the EULAG-MHD code.
Abstract: With the numerous pieces of evidence for the close evolution of super-massive black holes (SMBHs) and their host galaxies throughout the cosmic history, there has been a great effort to understand what drives such fact. One key point which could help achieve that goal is to observe the very first SMBHs in the early Universe and explore the initial conditions and what sets such co-evolution. This talk will guide you through the observational perspectives of this cosmic dance between SMBHs and their hosts, and the some alternative strategies to study them.
Abstract: In this talk, we introduce the field of General Relativistic Magnetohydrodynamics (GRMHD) and give an overview on recent effort toward simulating and visualizing astrophysically realistic gas dynamics around compact binaries. In particular we motivate our group's approach, where a post-Newtonian expansion is used to construct an analytic spacetime, and we show preliminary results of circumbinary disks surrounding an equal-mass non-spinning black hole binary.
Abstract: Callegari and Rodríguez (2013) numerically show that, in the domain of the classical model of spin-orbit resonances developed for natural satellites and Mercury, (Goldreich & Peale 1966), the rotation of super-earths with orbital period P
Juan Carlos Degollado Daza, who has been a post-doctoral research at Gr@v since 2012, working on numerical relativity, has accepted a permanent professor position at the University of Guadalajara, Mexico. Congratulations Juan Carlos, well done!
"Black holes have no hair" - is a famous `mantra' coined by John Wheeler in 1971, to express that astrophysical black holes should all have very similar physical properties. In a paper to appear in Physical Review Letters, however, Gr@v researchers C. Herdeiro and E. Radu showed that actually astrophysical black holes need not be bald!
Abstract: I will present the results of an observing campaign performed with the TNG telescope which aim was to study the transmission spectrum of HAT-P-1b. I will present the observations, data analysis and compare the results with previous observations of this target and with theoretical models predictions.
Abstract: M dwarfs are the faintest, coldest and smallest stars in the main sequence. Ubiquitous and long lived, M dwarfs comprise about 70% of all stars in the Galaxy and around half of its baryonic matter. However, despite being so omnipresent and close-by, not a single M dwarf can be seen with the naked eye, due to their very low intrinsic brightness.
Our group coordinated the "Numerical Relativity and High Energy Physics" IRSES network (2012-2015). Here is a list of the global network meetings organized:
