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...
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NewsA large tidal stream observed in the Sombrero galaxy
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PublicationA 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...
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PublicationDESI 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...
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PublicationExtragalactic 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...
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PublicationFormation 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...
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PublicationGalaxy 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...
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PublicationGalaxy 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...
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PublicationGravitational 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...
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PublicationInteraction versus radio source generation: a CCD survey of galaxies with radio jets.
The authors present some general results suggesting that ongoing strong interaction or merging between elliptical galaxies produces a well defined type of radio...