73 citations · 310 across the 18 of their papers we have counts for
14 papers · 1 filter
GASTRO library II: Exploring Chemical Bimodalities in Disk Galaxies with GSE-like Mergers and Massive Star-forming Clumps
João A. S. Amarante, Chervin F. P. Laporte, Victor P. Debattista +10
We use several smoothed particle hydrodynamics+N-body models as part of the GASTRO library to study the role of high-density star-forming clumpy regions and a single merger on the…
Response of the LMC's Bar to a Recent SMC Collision and Implications for the SMC's Dark Matter Profile
Himansh Rathore, Gurtina Besla, Kathryne J. Daniel +1
The LMC's stellar bar is offset from the outer disk center, tilted from the disk plane, and does not drive gas inflows. These properties are atypical of bars in gas-rich galaxies,…
Minimum-entropy constraints on galactic potentials
Leandro Beraldo e Silva, Monica Valluri, Eugene Vasiliev +3
A tracer sample in a gravitational potential, starting from a generic initial condition, phase-mixes towards a stationary state. This evolution is accompanied by an entropy increas…
Exploring the Evolution of Massive Clumps in Simulations that Reproduce the Observed Milky Way α-element Abundance Bimodality
Bethany R. Garver, David L. Nidever, Victor P. Debattista +2
The Milky Way stellar disk has both a thin and a thick component. The thin disk is composed mostly of younger stars (8 Gyr) with a lower abundance of elements, while…
RomAndromeda: The Roman Survey of the Andromeda Halo
Arjun Dey, Joan Najita, Carrie Filion +50
As our nearest large neighbor, the Andromeda Galaxy provides a unique laboratory for investigating galaxy formation and the distribution and substructure properties of dark matter…
Early Growing Supermassive Black Holes Strengthen Bars and Boxy/Peanut Bulges
Vance Wheeler, Monica Valluri, Leandro Beraldo e Silva +2
Using N-body simulations we explore the effects of growing a supermassive black hole (SMBH) prior to or during the formation of a stellar bar. Keeping the final mass and growth rat…
The imprint of clump formation at high redshift. II. The chemistry of the bulge
Victor P. Debattista, David J. Liddicott, Oscar A. Gonzalez +11
In Paper I we showed that clumps in high-redshift galaxies, having a high star formation rate density (Σ_SFR), produce disks with two tracks in the [Fe/H]-[α/Fe] chemical space, si…
Orbital support and evolution of flat profiles of bars (shoulders)
Leandro Beraldo e Silva, Victor P. Debattista, Stuart R. Anderson +4
Many barred galaxies exhibit upturns (shoulders) in their bar major-axis density profile. Simulation studies have suggested that shoulders are supported by looped orbits, occ…
GASTRO library I: the simulated chemodynamical properties of several GSE-like stellar halos
João A. S. Amarante, Victor P. Debattista, Leandro Beraldo e Silva +2
The Milky Way stellar halo contains relics of ancient mergers that tell the story of our Galaxy's formation. Some of them are identified due to their similarity in energy, actions…
Tracing birth properties of stars with abundance clustering
Bridget L. Ratcliffe, Melissa K. Ness, Tobias Buck +4
To understand the formation and evolution of the Milky Way disk, we must connect its current properties to its past. We explore hydrodynamical cosmological simulations to investiga…
Geometric properties of galactic discs with clumpy episodes
Leandro Beraldo e Silva, Victor P. Debattista, Tigran Khachaturyants +1
A scenario for the formation of the bi-modality in the chemical space [/Fe] vs [Fe/H] of the Milky Way was recently proposed in which -enhanced stars are produced early and q…
The discreteness-driven relaxation of collisionless gravitating systems: entropy evolution in external potentials, N-dependence and the role of chaos
Leandro Beraldo e Silva, Walter de Siqueira Pedra, Monica Valluri +2
We investigate the old problem of the fast relaxation of collisionless -body systems which are collapsing or perturbed, emphasizing the importance of (non-collisional) discreten…
The Arrow of Time in the collapse of collisionless self-gravitating systems: non-validity of the Vlasov-Poisson equation during violent relaxation
Leandro Beraldo e Silva, Walter de Siqueira Pedra, Laerte Sodré +2
The collapse of a collisionless self-gravitating system, with the fast achievement of a quasi-stationary state, is driven by violent relaxation, with a typical particle interacting…
Statistical mechanics of self-gravitating systems: mixing as a criterion for indistinguishability
Leandro Beraldo e Silva, Marcos Lima, Laerte Sodré +1
We propose an association between the phase-space mixing level of a self-gravitating system and the indistinguishability of its constituents (stars or dark matter particles). This…