Boley, Aaron C., Hayfield, Tristen, Mayer, Lucio, Durisen, Richard H.
We explore the initial conditions for fragments in the extended regions (r>50 AU) of gravitationally unstable disks. We combine analytic estimates for the fragmentation of spiral arms with 3D SPH...
We review numerical work carried out over the last decade on the role of environmental mechanisms in shaping the nature of the faintest galaxies known, dwarf spheroidals (dSphs). In particular we...
Klimentowski, Jaroslaw, Lokas, Ewa L., Kazantzidis, Stelios, Mayer, Lucio, Mamon, Gary A., Prada, Francisco
Using high-resolution collisionless N-body simulations we study the properties of tidal tails formed in the immediate vicinity of a two-component dwarf galaxy evolving in a static potential of the...
The stellar structure and kinematics of dwarf spheroidal galaxies formed by tidal stirring (2009)
Lokas, Ewa L., Kazantzidis, Stelios, Klimentowski, Jaroslaw, Mayer, Lucio, Callegari, Simone
Using N-body simulations we study the stellar properties of dwarf spheroidal galaxies formed by tidally-induced morphological transformation of disky dwarfs on cosmologically-motivated eccentric...
Foreword: Advanced Science Letters (ASL), Special Issue on Computational Astrophysics (2009)
Computational astrophysics has undergone unprecedented development over the last decade, becoming a field of its own. The challenge ahead of us will involve increasingly complex multi-scale...
Bernard, Edouard J., Monelli, Matteo, Gallart, Carme, Drozdovsky, Igor, Stetson, Peter B., Aparicio, Antonio, ...
(abridged) We present the first study of the variable star populations in the isolated dwarf spheroidal galaxies (dSph) Cetus and Tucana. Based on Hubble Space Telescope images obtained with the...
Massive Black Hole Recoil in High Resolution Hosts (2008)
Guedes, Javiera, Diemand, Jürg, Zemp, Marcel, Kuhlen, Michael, Madau, Piero, Mayer, Lucio, ...
The final inspiral and coalescence of a black hole binary can produce highly beamed gravitational wave radiation. To conserve linear momentum, the black hole remnant can recoil with "kick" velocity...
Pairing of Supermassive Black Holes in unequal-mass galaxy mergers (2008)
Callegari, Simone, Mayer, Lucio, Kazantzidis, Stelios, Colpi, Monica, Governato, Fabio, Quinn, Thomas, ...
We examine the pairing process of supermassive black holes (SMBHs) down to scales of 20-100 pc using a set of N-body/SPH simulations of binary mergers of disk galaxies with mass ratios of 1:4 and...
Large scale galactic turbulence: can self-gravity drive the observed HI velocity dispersions? (2008)
Agertz, Oscar, Lake, George, Teyssier, Romain, Moore, Ben, Mayer, Lucio, Romeo, Alessandro B.
Observations of turbulent velocity dispersions in the HI component of galactic disks show a characteristic floor in galaxies with low star formation rates and within individual galaxies the...
Mayer, Lucio, Kazantzidis, Stelios, Escala, Andres
(Abridged) We review the results of the first multi-scale, hydrodynamical simulations of mergers between galaxies with central supermassive black holes (SMBHs) to investigate the formation of SMBH...
Migration and growth of giant planets in self-gravitating disks with varied thermodynamics (2008)
We report on the results of novel global high-resolution three-dimensional simulations of disk-planet interaction which incorporate simultaneously realistic radiation physics and the self-gravity of...
The anatomy of Leo I: how tidal tails affect the kinematics (2008)
Lokas, Ewa L., Klimentowski, Jaroslaw, Kazantzidis, Stelios, Mayer, Lucio
We model the recently published kinematic data set for Leo I dSph galaxy by fitting the solutions of the Jeans equations to the velocity dispersion and kurtosis profiles measured from the data. We...
Klimentowski, Jaroslaw, Lokas, Ewa L., Kazantzidis, Stelios, Mayer, Lucio, Mamon, Gary A., Prada, Francisco
We conduct a high-resolution collisionless N-body simulation to investigate the tidal evolution of a dwarf galaxy on an eccentric orbit in the Milky Way potential. The dwarf originally consists of a...
The formation of disk galaxies in computer simulations (2008)
Mayer, Lucio, Governato, Fabio, Kaufmann, Tobias
The formation of disk galaxies is one of the most outstanding problems in modern astrophysics and cosmology. We review the progress made by numerical simulations carried out on large parallel...
Mayer, Lucio, Gawryszczak, Artur
We review recent results of SPH simulations of gravitational instability in gaseous protoplanetary disks,emphasizing the role of thermodynamics in both isolated and binary systems. Contradictory...
The Causes of Halo Shape Changes Induced by Cooling Baryons: Disks Versus Substructures (2007)
Debattista, Victor P., Moore, Ben, Quinn, Thomas, Kazantzidis, Stelios, Maas, Ryan, Mayer, Lucio, ...
Cold dark matter cosmogony predicts triaxial dark matter halos, whereas observations find quite round halos. This is most likely due to the condensation of baryons leading to rounder halos. We...
Rapid Formation of Supermassive Black Hole Binaries in Galaxy Mergers with Gas (2007)
Mayer, Lucio, Kazantzidis, Stelios, Madau, Piero, Colpi, Monica, Quinn, Thomas, Wadsley, James
Supermassive black holes (SMBHs) are a ubiquitous component of the nuclei of galaxies. It is normally assumed that, following the merger of two massive galaxies, a SMBH binary will form, shrink due...
Gravitational instability in binary protoplanetary disks (2007)
Mayer, Lucio, Boss, Alan, Nelson, Andrew F.
We review the models and results of simulations of self-gravitating, gaseous protoplanetary disks in binary star systems. These models have been calculated by three different groups with three...
Early Gas Stripping as the Origin of the Darkest Galaxies in the Universe (2007)
Mayer, Lucio, Kazantzidis, Stelios, Mastropietro, Chiara, Wadsley, James
The known galaxies most dominated by dark matter (Draco, Ursa Minor and Andromeda IX) are satellites of the Milky Way and the Andromeda galaxies. They are members of a class of faint galaxies, devoid...
Fundamental differences between SPH and grid methods (2007)
Agertz, Oscar, Moore, Ben, Stadel, Joachim, Potter, Doug, Miniati, Francesco, Read, Justin, ...
Klimentowski, Jaroslaw, Lokas, Ewa L., Kazantzidis, Stelios, Prada, Francisco, Mayer, Lucio, Mamon, Gary A.
We study the origin and properties of the population of unbound stars in the kinematic samples of dwarf spheroidal galaxies. For this purpose we have run a high resolution N-body simulation of a...
Fundamental differences between SPH and grid methods (2006)
Agertz, Oscar, Moore, Ben, Stadel, Joachim, Potter, Doug, Miniati, Francesco, Read, Justin, ...
We have carried out a hydrodynamical code comparison study of interacting multiphase fluids. The two commonly used techniques of grid and smoothed particle hydrodynamics (SPH) show striking...
Mayer, Lucio, Lufkin, Graeme, Quinn, Thomas, Wadsley, James
We report on the results of the first 3D SPH simulation of massive, gravitationally unstable protoplanetary disks with radiative transfer. We adopt a flux-limited diffusion scheme justified by the...
Durisen, Richard, Boss, Alan, Mayer, Lucio, Nelson, Andy, Quinn, Thomas, Rice, Ken
Protoplanetary gas disks are likely to experience gravitational instabilites (GI's) during some phase of their evolution. Density perturbations in an unstable disk grow on a dynamic time scale into...
Multi-scale simulations of merging galaxies with supermassive black holes (2006)
Mayer, Lucio, Kazantzidis, Stelios, Madau, Piero, Colpi, Monica, Quinn, Thomas, Wadsley, James
We present the results of the first multi-scale N-Body+SPH simulations of merging galaxies containing central supermassive black holes (SMBHs) and having a spatial resolution of only a few parsecs....
Angular momentum transport and disk morphology in SPH simulations of galaxy formation (2006)
Kaufmann, Tobias, Mayer, Lucio, Wadsley, James, Stadel, Joachim, Moore, Ben
We perform controlled N-Body/SPH simulations of disk galaxy formation by cooling a rotating gaseous mass distribution inside equilibrium cuspy spherical and triaxial dark matter halos. We...
Governato, Fabio, Willman, Beth, Mayer, Lucio
We used fully cosmological, high resolution N-body + SPH simulations to follow the formation of disk galaxies with a rotational velocity between 140 and 280 Km/sec in a Lambda CDM universe. The...
The Secular Evolution of Disk Structural Parameters (2005)
Debattista, Victor P., Mayer, Lucio, Carollo, C. Marcella, Moore, Ben, Wadsley, James, Quinn, Thomas
We present a comprehensive series of $N$-body as well as $N$-body + SPH simulations to study the secular evolution of the structure of disk galaxies. Our simulations are organized in a hierarchy of...
Giordano, Lea, Cortese, Luca, Trinchieri, Ginevra, Wolter, Anna, Colpi, Monica, Gavazzi, Giuseppe, ...
Chandra images of the elliptical galaxy NGC4261 have revealed an anisotropy in the spatial distribution of the off-nuclear X-ray sources, interpreted by Zezas et al. as evidence of an association...
Kaufmann, Tobias, Mayer, Lucio, Wadsley, James, Stadel, Joachim, Moore, Ben
We study the formation of disks via the cooling flow of gas within galactic haloes using smoothed particle hydrodynamics simulations. These simulations resolve mass scales of a few thousand solar...
We discuss the role of environmental mechanisms in the evolution of dwarf galaxy satellites using high-resolution N-Body+SPH simulations that include simultaneously tidal forces, ram pressure and...
The Kinematic Signature of Face-On Peanut-Shaped Bulges (2005)
Debattista, Victor P., Carollo, C. Marcella, Mayer, Lucio, Moore, Ben
We present a kinematic diagnostic for peanut-shaped bulges in nearly face-on galaxies. The face-on view provides a novel perspective on peanuts which would allow study of their relation to bars and...
Simultaneous ram pressure and tidal stripping; how dwarf spheroidals lost their gas (2005)
Mayer, Lucio, Mastropietro, Chiara, Wadsley, James, Stadel, Joachim, Moore, Ben
We perform high-resolution N-Body+SPH simulations of gas-rich dwarf galaxy satellites orbiting within a Milky Way-sized halo and study for the first time the combined effects of tides and ram...
High resolution SPH simulations of disk formation in CDM halos; resolution tests (2004)
Kaufmann, Tobias, Mayer, Lucio, Moore, Ben, Stadel, Joachim, Wadsley, James
We perform N-Body/SPH simulations of disk galaxy formation inside equilibrium spherical and triaxial cuspy dark matter halos. We systematically study the disk properties and morphology as we increase...
The gravitational and hydrodynamical interaction between the LMC and the Galaxy (2004)
Mastropietro, Chiara, Moore, Ben, Mayer, Lucio, Wadsley, James, Stadel, Joachim
We use high resolution N-Body/SPH simulations to study the hydrodynamical and gravitational interaction between the Large Magellanic Cloud and the Milky Way. We model the dark and hot extended halo...
Morphological evolution of disk galaxies in clusters (2004)
Mastropietro, Chiara, Moore, Ben, Mayer, Lucio, Debattista, Victor P., Piffaretti, Rocco, Stadel, Joachim
The recent discovery of hidden non-axysimmetric and disk-like structures in bright Virgo dwarf elliptical and lenticular galaxies (dE/dSph/dS0) indicates that they may have late-type progenitors....
We discuss the role that numerical effects have in cosmological N-Body/SPH simulations of disk galaxy formation. We show that the resolution of current state-of-the-art calculations, about $10^5$ SPH...
Kazantzidis, Stelios, Mayer, Lucio, Colpi, Monica, Madau, Piero, Debattista, Victor P., Wadsley, James, ...
We analyze the effect of dissipation on the orbital evolution of supermassive black holes (SMBHs) using high-resolution self-consistent gasdynamical simulations of binary equal- and unequal-mass...
Mayer, Lucio, Wadsley, James, Quinn, Thomas, Stadel, Joachim
We use high resolution 3D SPH simulations to study the evolution of self-gravitating binary protoplanetary disks. Heating by shocks and cooling are included. We consider different orbital separations...
Bulges or Bars from Secular Evolution? (2004)
Debattista, Victor P., Carollo, C. Marcella, Mayer, Lucio, Moore, Ben
We use high resolution collisionless $N$-body simulations to study the secular evolution of disk galaxies and in particular the final properties of disks that suffer a bar and perhaps a bar-buckling...
Kazantzidis, Stelios, Mayer, Lucio, Mastropietro, Chiara, Diemand, Juerg, Stadel, Joachim, Moore, Ben
The structural evolution of substructure in cold dark matter (CDM) models is investigated combining ``low-resolution'' satellites from cosmological N-body simulations of parent halos with N=10^7...
Giant planet formation from disk instability; cooling and heating (2003)
Mayer, Lucio, Wadsley, James, Quinn, Thomas, Stadel, Joachim
We present the results of high resolution SPH simulations of the evolution of gravitationally unstable protoplanetary disks. We report on calculations in which the disk is evolved using a locally...
Mayer, Lucio, Quinn, Thomas, Wadsley, James, Stadel, Joachim
We carry out a large set of very high resolution, three dimensional smoothed particle hydrodynamics (SPH) simulations describing the evolution of gravitationally unstable gaseous protoplanetary...
We show that a global relation between baryonic mass and virial velocity can be constructed from the scale of dwarf galaxies up to that of rich galaxy clusters. The slope of this relation is close to...
Sweeping and shaking dwarf satellites (2003)
We present the first high-resolution N-Body/SPH simulations that follow the evolution of low surface brightness disk satellites in a primary halo containing both dark matter and a hot gas component....
Galaxies and Overmerging: What Does it Take to Destroy a Satellite Galaxy? (2003)
Kazantzidis, Stelios, Moore, Ben, Mayer, Lucio
The Ultra Compact Dwarf (UCD) galaxies recently discovered in the Fornax and Virgo clusters exhibit structural similarity to the dense nuclei of nucleated dEs indicating that the progenitor galaxy...
We perform several high resolution N-Body/SPH simulations of low surface brightness galaxies (LSBs) embedded in cold dark matter halos to study how likely is bar formation in such systems. The...
Simulations of unstable gaseous disks and the origin of giant planets (2003)
Mayer, Lucio, Quinn, Thomas, Wadsley, James, Stadel, Joachim
We study the evolution of cold, gravitationally unstable protoplanetary gaseous disks performing 3D SPH simulations with up to a million particles on large parallel machines. We show that...
On the Life and Death of Satellite Haloes (2003)
Taffoni, Giuliano, Mayer, Lucio, Colpi, Monica, Governato, Fabio
We study the evolution of dark matter satellites orbiting inside more massive haloes using semi-analytical tools coupled with high-resolution N-Body simulations. We select initial satellite sizes,...
Formation of giant planets by fragmentation of protoplanetary disks (2003)
Mayer, Lucio, Quinn, Thomas, Wadsley, James, Stadel, Joachim
The evolution of gravitationally unstable protoplanetary gaseous disks has been studied with the use of three-dimensional smoothed particle hydrodynamics simulations with unprecedented resolution. We...
Galaxy formation with SPH Elektronische Daten (2003)
Mayer, Lucio, Astrophysics Conference
Talk Abstract von Kongress: Star and Structure Formation: From First Light to the Milky Way, Astrophysics Conference, August 18-22, 2003, ETH Zurich, Switzerland
Tidal debris of dwarf spheroidals as a probe of structure formation models (2001)
Mayer, Lucio, Moore, Ben, Quinn, Thomas, Governato, Fabio, Stadel, Joachim
Recent observations suggest that Carina and other nearby dwarf spheroidal galaxies are surrounded by unbound stars tidally stripped by the Milky Way. We run high-resolution N-Body simulations of...
Disruption of satellites in cosmological haloes (2001)
Taffoni, Giuliano, Mayer, Lucio, Colpi, Monica, Governato, Fabio
We investigate how the survival of dark matter satellites inside virialized halos depends on tidal stripping and dynamical friction. We use an analytic approach and then compare the results with...
Dwarf spheroidals with tidal tails and structure formation (2001)
Recent N-Body simulations have shown that dIrrs evolve into dSphs owing to the strong tidal perturbation of the Milky Way. Satellites whose dark matter halos have a core or an NFW profile with a...
The Metamorphosis of Tidally Stirred Dwarf Galaxies (2001)
Mayer, Lucio, Governato, Fabio, Colpi, Monica, Moore, Ben, Quinn, Thomas, Wadsley, James, ...
We present results from high-resolution N-Body/SPH simulations of rotationally supported dwarf irregular galaxies moving on bound orbits in the massive dark matter halo of the Milky Way.The dwarf...
Tidal stirring and the origin of dwarf spheroidals in the Local Group (2000)
Mayer, Lucio, Governato, Fabio, Colpi, Monica, Moore, Ben, Quinn, Tom, Wadsley, James, ...
N-Body/SPH simulations are used to study the evolution of dwarf irregular galaxies (dIrrs) entering the dark matter halo of the Milky Way or M31 on plunging orbits. We propose a new dynamical...
Colpi, Monica, Mayer, Lucio, Governato, Fabio
The evolution of a small satellite inside a more massive truncated isothermal spherical halo is studied using both the Theory of Linear Response for dynamical friction and N-Body simulations. The...
The morphological evolution of galaxy satellites (1999)
Mayer, Lucio, Governato, Fabio, Colpi, Monica, Moore, Ben, Quinn, Thomas R., Baugh, Carlton M.
We study the evolution of galaxy satellites with high resolution N-body simulations. Satellites are modeled as replicas of typical low and high surface brightness galaxies (LSBs and HSBs). Encounters...
Impianti ferroviari : tecnica ed esercizio / Lucio Mayer (1976)
"Lezioni ... tenute sell'Universita di Napoli nel 1962-63 ed in quella di Roma fenoal 1977"