Astrophysical: Galaxy mergers

  • News
    A large tidal stream observed in the Sombrero galaxy
    According to the latest cosmological models, large spiral galaxies such as the Milky Way grew by absorbing smaller galaxies, by a sort of galactic cannibalism...
  • Publication
    A Minor-Merger Origin for Inner Disks and Rings in Early-Type Galaxies
    Nuclear disks and rings are frequent galaxy substructures, for a wide range of morphological types [from S0 to Sc, see e.g., 1, 2]. We have investigated the...
  • Publication
    DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of Our Nearest Neighbor
    We present Dark Energy Spectroscopic Instrument (DESI) observations of the inner halo of M31, which reveal the kinematics of a recent merger-a galactic...
  • Publication
    Detection of Multiple Phase Space Overdensities of GSE Stars by Orbit Integration
    In N-body simulations, nearly radial mergers can form shell-like overdensities in the sky position and phase space (r - v r ) due to the combination of...
  • Publication
    Extragalactic Magnetism with SOFIA (SALSA Legacy Program): The Magnetic Fields in the Multiphase Interstellar Medium of the Antennae Galaxies
    Mergers are thought to be a fundamental channel for galaxy growth, perturbing the gas dynamics and the magnetic fields (B-fields) in the interstellar medium...
  • Publication
    Formation of Slowly Rotating Elliptical Galaxies in Major Mergers. A Resolution Study
    We study resolution effects in numerical simulations of gas-rich (20% of the total baryonic mass) major mergers, and show that the formation of slowly-rotating...
  • Publication
    Galaxy Disk Heating as a Result of Minor Mergers
    We perform N-body simulations of a minor merger between a Milky Way like galaxy and a disk-like satellite. In this set of collisionless runs we vary critical...
  • Publication
    Galaxy pairs and clusters in a lambda CDM universe: Bridging observation and simulation
    I use computer simulations to examine the evolution of close galaxy pair counts and the formation of galaxy clusters. I show that the evolution of the close...
  • Publication
    Gravitational waves from galaxy encounters
    We discuss the emission of gravitational radiation produced in encounters of dark matter galactic halos. To this aim we perform a number of numerical...