142 citations · 2k across the 41 of their papers we have counts for
27 papers · 1 filter
Connection between galaxy morphology and dark-matter halo structure I: a running threshold for thin discs and size predictors from the dark sector
Jinning Liang, Fangzhou Jiang, Houjun Mo +5
We study the connection between galaxy morphology and host dark matter (DM) halo structure using cosmological simulations. Introducing a new kinematic decomposition scheme, we robu…
Constrain the Dark Matter Distribution of Ultra-diffuse Galaxies with Globular-Cluster Mass Segregation: A Case Study with NGC5846-UDG1
Jinning Liang, Fangzhou Jiang, Shany Danieli +2
The properties of globular clusters (GCs) contain valuable information of their host galaxies and dark-matter halos. In the remarkable example of ultra-diffuse galaxy, NGC5846-UDG1…
Wet Compaction to a Blue Nugget: a Critical Phase in Galaxy Evolution
Sharon Lapiner, Avishai Dekel, Jonathan Freundlich +6
We utilize high-resolution cosmological simulations to reveal that high-redshift galaxies tend to undergo a robust `wet compaction' event when near a `golden' stellar mass of $\sim…
What Causes The Formation of Disks and End of Bursty Star Formation?
Philip F. Hopkins, Alexander B. Gurvich, Xuejian Shen +17
As they grow, galaxies can transition from irregular/spheroidal with 'bursty' star formation histories (SFHs), to disky with smooth SFHs. But even in simulations, the direct physic…
Novel Conservative Methods for Adaptive Force Softening in Collisionless and Multi-Species N-Body Simulations
Philip F. Hopkins, Ethan O. Nadler, Michael Y. Grudic +3
Modeling self-gravity of collisionless fluids (e.g. ensembles of dark matter, stars, black holes, dust, planetary bodies) in simulations is challenging and requires some force soft…
ELVES III: Environmental Quenching by Milky Way-Mass Hosts
Jenny E. Greene, Shany Danieli, Scott Carlsten +3
Isolated dwarf galaxies usually exhibit robust star formation but satellite dwarf galaxies are often devoid of young stars, even in Milky Way-mass groups. Dwarf galaxies thus offer…
ELVES IV: The Satellite Stellar-to-Halo Mass Relation Beyond the Milky-Way
Shany Danieli, Jenny E. Greene, Scott Carlsten +3
Quantifying the connection between galaxies and their host dark matter halos has been key for testing cosmological models on various scales. Below , suc…
Dissipative Dark Matter on FIRE: II. Observational signatures and constraints from local dwarf galaxies
Xuejian Shen, Philip F. Hopkins, Lina Necib +3
We analyze the first set of cosmological baryonic zoom-in simulations of galaxies in dissipative self-interacting dark matter (dSIDM). The simulations utilize the FIRE-2 galaxy for…
Galaxies lacking dark matter produced by close encounters in a cosmological simulation
Jorge Moreno, Shany Danieli, James S. Bullock +18
The standard cold dark matter plus cosmological constant model predicts that galaxies form within dark-matter haloes, and that low-mass galaxies are more dark-matter dominated than…
SatGen -- II. Assessing the impact of a disc potential on subhalo populations
Sheridan B. Green, Frank C. van den Bosch, Fangzhou Jiang
The demographics of dark matter substructure depend sensitively on the nature of dark matter. Optimally leveraging this probe requires accurate theoretical predictions regarding th…
Core Formation in High-z Massive Haloes: Heating by Post Compaction Satellites and Response to AGN Outflows
Avishai Dekel, Jonathan Freundlich, Fangzhou Jiang +6
Observed rotation curves in star-forming galaxies indicate a puzzling dearth of dark matter in extended flat cores within haloes of mass at . T…
A Search for Wandering Black Holes in the Milky Way with Gaia and DECaLS
Jenny E. Greene, Lachlan Lancaster, Yuan-Sen Ting +6
We present a search for "hyper-compact" star clusters in the Milky Way using a combination of Gaia and the Dark Energy Camera Legacy Survey (DECaLS). Such putative clusters, with s…
The tidal evolution of dark matter substructure -- II. The impact of artificial disruption on subhalo mass functions and radial profiles
Sheridan B. Green, Frank C. van den Bosch, Fangzhou Jiang
Several recent studies have indicated that artificial subhalo disruption (the spontaneous, non-physical disintegration of a subhalo) remains prevalent in state-of-the-art dark matt…
Dissipative Dark Matter on FIRE: I. Structural and kinematic properties of dwarf galaxies
Xuejian Shen, Philip F. Hopkins, Lina Necib +3
We present the first set of cosmological baryonic zoom-in simulations of galaxies including dissipative self-interacting dark matter (dSIDM). These simulations utilize the Feedback…
SatGen: a semi-analytical satellite galaxy generator -- I. The model and its application to Local-Group satellite statistics
Fangzhou Jiang, Avishai Dekel, Jonathan Freundlich +5
We present a semi-analytic model of satellite galaxies, SatGen, which can generate large samples of satellite populations for a host halo of desired mass, redshift, and assembly hi…
The Dekel-Zhao profile: A mass-dependent dark-matter density profile with flexible inner slope and analytic potential, velocity dispersion, and lensing properties
Jonathan Freundlich, Fangzhou Jiang, Avishai Dekel +6
We explore a function with two shape parameters for the dark-matter halo density profile subject to baryonic effects, which is a special case of the general Zhao family of models a…
Origin of Star-Forming Rings around Massive Centres in Massive Galaxies at
Avishai Dekel, Sharon Lapiner, Omri Ginzburg +9
Using analytic modeling and simulations, we address the origin of an abundance of star-forming, clumpy, extended gas rings about massive central bodies in massive galaxies at $z \!…
A mass threshold for galactic gas discs by spin flips
Avishai Dekel, Omri Ginzburg, Fangzhou Jiang +4
We predict, analytically and by simulations, that gas discs tend to survive only in haloes above a threshold mass (stellar mass )…
The SFR-radius connection: data and implications for wind strength and halo concentration
Lin Lin, S. M. Faber, David C. Koo +26
This paper is one in a series that explores the importance of radius as a second parameter in galaxy evolution. The topic investigated here is the relationship between star formati…
Quenching as a Contest between Galaxy Halos and their Central Black Holes
Zhu Chen, S. M. Faber, David. C. Koo +27
Existing models of galaxy formation have not yet explained striking correlations between structure and star-formation activity in galaxies, notably the sloped and moving boundaries…
A model for core formation in dark matter haloes and ultra diffuse galaxies by outflow episodes
Jonathan Freundlich, Avishai Dekel, Fangzhou Jiang +5
We present a simple model for the response of a dissipationless spherical system to an instantaneous mass change at its center, describing the formation of flat cores in dark matte…
The Global Star-Formation Law by Supernova Feedback
Avishai Dekel, Kartick C. Sarkar, Fangzhou Jiang +4
We address a simple model where the Kennicutt-Schmidt (KS) relation between the macroscopic densities of star-formation rate (SFR, ) and gas () in galactic discs em…
Formation of ultra-diffuse galaxies in the field and in galaxy groups
Fangzhou Jiang, Avishai Dekel, Jonathan Freundlich +4
We study ultra-diffuse galaxies (UDGs) in zoom in cosmological simulations, seeking the origin of UDGs in the field versus galaxy groups. We find that while field UDGs arise from d…
Is the dark-matter halo spin a predictor of galaxy spin and size?
Fangzhou Jiang, Avishai Dekel, Omer Kneller +8
The similarity between the distributions of spins for galaxies () and for dark-matter haloes (), indicated both by simulations and observations, is naively in…