Astrophysical: Gravitation

  • Talk
    Is General Relativity a restricted theory?

    Things should be made simple, but not simpler. What we want to show is that General Relativity, as it stands today, can be considered as a gravitational theory...

  • Talk
    A new framework for investigating the evolution of Early Type Galaxies

    I present a detailed analysis of the scaling relations of ETGs and suggest a way to predict the evolution of the distributions of galaxies in these planes. This...

  • Publication
    A pulse-timing model for pulsars in massive eclipsing binaries. Delays caused by high ratios between the pulsar period and orbital length.

    We study the delay induced by gravitational light bending in the arrival times of signals emitted by an anisotropic source in rotation (pulsar). The shift of...

  • Publication
    Asymmetrical tidal tails of open star clusters: stars crossing their cluster's práh<SUP>†</SUP> challenge Newtonian gravitation

    After their birth a significant fraction of all stars pass through the tidal threshold (práh) of their cluster of origin into the classical tidal tails. The...

  • Talk
    Beyond the Concordance Model with galaxy cluster mass profiles

    I present the recent results obtained using the updated version of MG-MAMPOSSt, a code that constrains modified gravity (MG) models viable at cosmological...

  • Publication
    Black hole mass and spin measurements through the relativistic precession model: XTE J1859+226

    The X-ray light curves of accreting black holes and neutron stars in binary systems show various types of quasi-periodic oscillations (QPOs), the origin of...

  • Publication
    Challenging a Newtonian prediction through Gaia wide binaries

    Under Newtonian dynamics, the relative motion of the components of a binary star should follow a Keplerian scaling with separation. Once orientation effects and...

  • Publication
    Constraining Lorentz Invariance Violation Using the Crab Pulsar Emission Observed up to TeV Energies by MAGIC

    Spontaneous breaking of Lorentz symmetry at energies on the order of the Planck energy or lower is predicted by many quantum gravity theories, implying non...

  • Talk
    Constraints on Ultra-Light Dark Matter from Galactic Rotation Curves

    Bosonic ultra-light dark matter (ULDM) in the mass range m ~ $10^{-22} - 10^{-21} \rm eV$ has been invoked as a motivated candidate with new input for the small...