The Dual Origin of Stellar Halos (2009)
Zolotov, Adi, Willman, Beth, Brooks, Alyson M., Governato, Fabio, Brook, Chris B., Hogg, David W., ...
We investigate the formation of the stellar halos of four simulated disk galaxies using high-resolution, cosmological SPH + N-body simulations. These simulations include a self-consistent treatment...
The nature of HI absorbers in GRB afterglows: clues from hydrodynamic simulations (2009)
Pontzen, Andrew, Deason, Alis, Governato, Fabio, Pettini, Max, Wadsley, James, Quinn, Thomas, ...
In recent work, we have shown that it is possible to link quantitatively many aspects of damped Lyman alpha (DLA) absorbers in the spectra of quasars to high resolution simulations of galaxy...
The ACS Nearby Galaxy Survey Treasury (2009)
Dalcanton, Julianne J., Williams, Benjamin F., Seth, Anil C., Dolphin, Andrew, Holtzman, Jon, Rosema, Keith, ...
The ACS Nearby Galaxy Survey Treasury (ANGST) is a systematic survey to establish a legacy of uniform multi-color photometry of resolved stars for a volume-limited sample of nearby galaxies (D14...
The Dual Origin of Stellar Halos (2009)
Zolotov, Adi, Willman, Beth, Brooks, Alyson M., Governato, Fabio, Brook, Chris B., Hogg, David W., ...
We investigate the formation of the stellar halos of four simulated disk galaxies using high resolution, cosmological SPH + N-Body simulations. These simulations include a self-consistent treatment...
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...
Damped Lyman Alpha Systems in Galaxy Formation Simulations (2008)
Pontzen, Andrew, Governato, Fabio, Pettini, Max, Booth, C. M., Stinson, Greg, Wadsley, James, ...
We investigate the population of z=3 damped Lyman alpha absorbers (DLAs) in a recent series of high resolution galaxy formation simulations. The simulations are of interest because they form at z=0...
The Formation of Polar Disk Galaxies (2008)
Brook, Chris B., Governato, Fabio, Quinn, Thomas, Wadsley, James, Brooks, Alyson M., Willman, Beth, ...
Polar Ring Galaxies, such as NGC4650A, are a class of galaxy which have two kinematically distinct components that are inclined by almost 90 degrees to each other. These striking galaxies challenge...
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...
Stinson, Greg, Seth, Anil, Katz, Neal, Wadsley, James, Governato, Fabio, Quinn, Tom
We present an analysis of star formation and feedback recipes appropriate for galactic smoothed particle hydrodynamics simulations. Using an isolated Milky Way-like galaxy, we constrain these recipes...
The age dependence of galaxy clustering (2006)
Reed, Darren S., Governato, Fabio, Quinn, Thomas, Stadel, Joachim, Lake, George
We construct mock galaxy catalogues to analyse clustering properties of a Lambda cold dark matter (LCDM) universe within a cosmological dark matter simulation of sufficient resolution to resolve...
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...
Valenzuela, Octavio, Rhee, George, Klypin, Anatoly, Governato, Fabio, Stinson, Gregory, Quinn, Thomas, ...
Two well studied dwarf galaxies -- NGC 3109 and NGC 6822 -- present some of the strongest observational support for a flat core at the center of galactic dark matter (DM) halos. We use detailed...
Governato, Fabio, Stinson, Greg, Wadsley, J., Quinn, T.
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...
Evolution of the density profiles of dark matter haloes (2005)
Reed, Darren, Governato, Fabio, Verde, Licia, Gardner, Jeffrey, Quinn, Thomas, Stadel, Joachim, ...
Also archived in: arXiv: astro-ph/0312544 v3 1 Apr 2005
The signature of dark energy on the local Hubble flow (2004)
Maccio', Andrea V., Governato, Fabio, Horellou, Cathy
Using N-body simulations of flat, dark energy dominated cosmologies, we show that galaxies around simulated binary systems resembling the Local Group (LG) have low peculiar velocities, in good...
Dark Matter Subhaloes in Numerical Simulations (2004)
Reed, Darren, Governato, Fabio, Quinn, Thomas, Gardner, Jeffrey, Stadel, Joachim, Lake, George
We use cosmological LCDM numerical simulations to model the evolution of the substructure population in sixteen dark matter haloes with resolutions of up to seven million particles within the virial...
The Origin and Properties of Intracluster Stars in a Rich Cluster (2004)
Willman, Beth, Governato, Fabio, Wadsley, James, Quinn, Thomas
We use a multi million particle N-body + SPH simulation to follow the formation of a rich galaxy cluster in a Lambda+CDM cosmology, with the goal of understanding the origin and properties of...
Disk-Planet Interaction: Triggered Formation and Migration (2004)
Lufkin, Graeme, Quinn, Thomas, Governato, Fabio
We present three-dimensional SPH calculations of giant planets embedded in gaseous disks. Our findings are collected into a map of parameter space, exhibiting four distinct regions: Type I migration,...
Evolution of the Density Profiles of Dark Matter Haloes (2003)
Reed, Darren, Governato, Fabio, Verde, Licia, Gardner, Jeffrey, Quinn, Thomas, Stadel, Joachim, ...
We use numerical simulations in a Lambda CDM cosmology to model density profiles in a set of 16 dark matter haloes with resolutions of up to 7 million particles within the virial radius. These...
Simulations of Gaseous Disc-Embedded Planet Interaction (2003)
Lufkin, Graeme, Quinn, Thomas, Wadsley, James, Stadel, Joachim, Governato, Fabio
We present three-dimensional self-gravitating smoothed-particle hydrodynamics (SPH) simulations of an isothermal gaseous disc interacting with an embedded planet. Discs of varying stability are...
Evolution of the Mass Function of Dark Matter Haloes (2003)
Reed, Darren, Gardner, Jeffrey, Quinn, Thomas, Stadel, Joachim, Fardal, Mark, Lake, George, ...
We use a high resolution $\Lambda$CDM numerical simulation to calculate the mass function of dark matter haloes down to the scale of dwarf galaxies, back to a redshift of fifteen, in a 50 $h^{-1}$Mpc...
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,...
Napolitano, Nicola R., Pannella, Maurilio, Arnaboldi, Magda, Gerhard, Ortwin, Aguerri, J. Alfonso L., Freeman, Kenneth C., ...
Frequently Asked Questions on the Luminosity--Temperature relation in Groups and Clusters (2002)
Efforts to understand the deviation of the L--T relation from a simple scaling law valid for clusters and groups have triggered a number of interesting studies on the subject. Techniques and...
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...
Dark matter in Draco and the Local Group: Implications for direct detection experiments (2001)
Moore, Ben, Calcaneo-Roldan, Carlos, Stadel, Joachim, Quinn, Tom, Lake, George, Ghigna, Sebastiano, ...
We use a cosmological simulation of the Local Group to make quantitative and speculative predictions for direct detection experiments. Cold dark matter (CDM) halos form via a complex series of...
Is Cold Dark Matter Still a Strong Buy? The Lesson from Galaxy Clusters (2001)
Governato, Fabio, Ghigna, Sebastiano, Moore, Ben
For the last few years the Cold Dark Matter model (ticker: CDM), has been the dominant theory of structure formation. We briefly review the recent advancements and predictions of the model in the...
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...
Ghigna, Sebastiano, Moore, Ben, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim
Can N-body simulations reliably determine the structural properties of dark matter halos? Focussing on a Virgo-sized galaxy cluster, we increase the resolution of current ``high resolution...
Dark Matter Substructure in Galactic Halos (1999)
Moore, Ben, Ghigna, Sebastiano, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim, ...
We use numerical simulations to examine the substructure within galactic and cluster mass halos that form within a hierarchical universe. Clusters are easily reproduced with a steep mass spectrum of...
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...
Cold collapse and the core catastrophe (1999)
Moore, Ben, Quinn, Tom, Governato, Fabio, Stadel, Joachim, Lake, George
We show that a universe dominated by cold dark matter fails to reproduce the rotation curves of dark matter dominated galaxies, one of the key problems that it was designed to resolve. We perform...
Semi-analytical galaxy formation models and the high redshift universe (1998)
Lacey, Cedric, Baugh, Carlton, Cole, Shaun, Frenk, Carlos, Governato, Fabio
Semi-analytical models of galaxy formation based on hierarchical clustering now make a wide range of predictions for observable properties of galaxies at low and high redshift. This article...
Dark Matter Halos within Clusters (1998)
Ghigna, Sebastiano, Moore, Ben, Governato, Fabio, Lake, George, Quinn, Thomas, Stadel, Joachim
We examine the properties of dark matter halos within a rich galaxy cluster using a high resolution simulation that captures the cosmological context of a cold dark matter universe. The mass and...
The Structure and Dynamics of Cold Dark Matter Halos (1997)
Moore, Ben, Ghigna, Sebastiano, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim
We investigate the internal structure of cold dark matter halos using high resolution N-body simulations. As the mass and force resolution are increased, halo density profiles become steeper,...
Resolving the Structure of Cold Dark Matter Halos (1997)
Moore, Ben, Governato, Fabio, Quinn, Tom, Stadel, Joachim, Lake, George
We examine the effects of mass resolution and force softening on the density profiles of cold dark matter halos that form within cosmological N-body simulations. As we increase the mass and force...
Prospects for Cosmology with Cluster Mass Profiles (1996)
Crone, Mary, Governato, Fabio, Stadel, Joachim, Quinn, Thomas
We test the precision with which weak lensing data can provide characteristic cluster mass profiles within Cold Dark Matter scenarios. Using a parallel treecode to simulate volumes as large as 500h-1...
Bringing light to galaxy formation simulations (1996)
Gelato, Sergio, Governato, Fabio
Models of galaxy formation ultimately aim at reproducing the _observed_ properties of galaxies. We report on work in progress to predict luminosities, colours and morphologies of field objects of...
Small Groups of Galaxies: a Clue to a Critical Universe (1995)
Governato, Fabio, Tozzi, Paolo, Cavaliere, Alfonso
We study the formation and the evolution of galaxy groups in a critical universe, showing the importance of secondary infall for their dynamical evolution. Merging is only slightly accelerated if...