Publications (83)
The dark matter component of the Gaia radially anisotropic substructure
Nassim Bozorgnia, Azadeh Fattahi, Carlos S. Frenk +5
We study the properties of the dark matter component of the radially anisotropic stellar population recently identified in the Gaia data, using magneto-hydrodynamical simulations o…
Pre-supernova stellar feedback in nearby starburst dwarf galaxies
Lucie E. Rowland, Anna F. McLeod, Azadeh Fattahi +7
Stellar feedback in dwarf galaxies remains, to date, poorly explored, yet is crucial to understanding galaxy evolution in the early Universe. In particular, pre-supernova feedback…
Sausage & Mash: The dual origin of the Galactic thick disc and halo from the gas-rich Gaia-Enceladus-Sausage merger
Robert J. J. Grand, Daisuke Kawata, Vasily Belokurov +6
We analyse a set of cosmological magneto-hydrodynamic simulations of the formation of Milky Way-mass galaxies identified to have a prominent radially anisotropic stellar halo compo…
The origin of the mass discrepancy-acceleration relation in CDM
Julio F. Navarro, Alejandro BenÃtez-Llambay, Azadeh Fattahi +5
We examine the origin of the mass discrepancy--radial acceleration relation (MDAR) of disk galaxies. This is a tight empirical correlation between the disk centripetal acceleration…
Tiny galaxies and dark substructures: exploring the "dark" subhaloes in TNG50
Jessica E. Doppel, Mathilde Jauzac, David J. Lagattuta +2
Dark matter haloes and subhaloes that host no luminous counterpart are predicted within our current understanding of galaxy formation within a CDM paradigm. Observational tests…
The innate origin of radial and vertical gradients in a simulated galaxy disc
Julio F. Navarro, Cameron Yozin, Nic Loewen +6
We examine the origin of radial and vertical gradients in the age/metallicity of the stellar component of a galaxy disc formed in the APOSTLE cosmological hydrody- namical simulati…
Knowing the unknowns: uncertainties in simple estimators of galactic dynamical masses
David J. R. Campbell, Carlos S. Frenk, Adrian Jenkins +7
The observed stellar kinematics of dispersion-supported galaxies are often used to measure dynamical masses. Recently, several analytical relationships between the stellar line-of-…
Galaxy Pairs in the Local Group
Azadeh Fattahi, Julio F. Navarro, Else Starkenburg +2
Current models of galaxy formation predict that galaxy pairs of comparable magnitudes should become increasingly rare with decreasing luminosity. This seems at odds with the relati…
Can we really pick and choose? Benchmarking various selections of Gaia Enceladus/Sausage stars in observations with simulations
Andreia Carrillo, Alis J. Deason, Azadeh Fattahi +2
Large spectroscopic surveys plus Gaia astrometry have shown us that the inner stellar halo of the Galaxy is dominated by the debris of Gaia Enceladus/Sausage (GES). With the richne…
Unravelling the mass spectrum of destroyed dwarf galaxies with the metallicity distribution function
Alis J. Deason, Sergey E. Koposov, Azadeh Fattahi +1
Accreted stellar populations are comprised of the remnants of destroyed galaxies, and often dominate the `stellar haloes' of galaxies such as the Milky Way (MW). This ensemble of e…
The APOSTLE project: Local Group kinematic mass constraints and simulation candidate selection
Azadeh Fattahi, Julio F. Navarro, Till Sawala +8
We use a large sample of isolated dark matter halo pairs drawn from cosmological N-body simulations to identify candidate systems whose kinematics match that of the Local Group of…
Local Group star formation in warm and self-interacting dark matter cosmologies
Mark R. Lovell, Wojciech Hellwing, Aaron Ludlow +5
The nature of the dark matter can affect the collapse time of dark matter haloes, and can therefore be imprinted in observables such as the stellar population ages and star formati…
The missing dwarf galaxies of the Local Group
Azadeh Fattahi, Julio F. Navarro, Carlos S. Frenk
We study the Local Group (LG) dwarf galaxy population predicted by the \apostle CDM cosmological hydrodynamics simulations. These indicate that: (i)~the total mass within M…
Tidal features of classical Milky Way satellites in a CDM universe
M. -Y. Wang, Azadeh Fattahi, Andrew P. Cooper +6
We use the APOSTLE cosmological hydrodynamic simulations to examine the effects of tidal stripping on cold dark matter (CDM) sub haloes that host three of the most luminous Milky W…
The Edge of the Galaxy
Alis J. Deason, Azadeh Fattahi, Carlos S. Frenk +5
We use cosmological simulations of isolated Milky Way-mass galaxies, as well as Local Group analogues, to define the "edge" -- a caustic manifested in a drop in density or radial v…
The unexpected diversity of dwarf galaxy rotation curves
Kyle A. Oman, Julio F. Navarro, Azadeh Fattahi +9
We examine the circular velocity profiles of galaxies in ÎCDM cosmological hydrodynamical simulations from the EAGLE and LOCAL GROUPS projects and compare them with a compilation…
The local high velocity tail and the Galactic escape speed
Alis J. Deason, Azadeh Fattahi, Vasily Belokurov +4
We model the fastest moving (v_tot > 300 km/s) local (D < 3 kpc) halo stars using cosmological simulations and 6-dimensional Gaia data. Our approach is to use our knowledge of the…
Aurigaia: mock Gaia DR2 stellar catalogues from the Auriga cosmological simulations
Robert J. J. Grand, John Helly, Azadeh Fattahi +12
We present and analyse mock stellar catalogues that match the selection criteria and observables (including uncertainties) of the Gaia satellite data release 2 (DR2). The source ar…
The cold dark matter content of Galactic dwarf spheroidals: no cores, no failures, no problem
Azadeh Fattahi, Julio F. Navarro, Till Sawala +5
We examine the dark matter content of satellite galaxies in Lambda-CDM cosmological hydrodynamical simulations of the Local Group from the APOSTLE project. We find excellent agreem…
Using the Multi-Object Adaptive Optics demonstrator RAVEN to observe metal-poor stars in and towards the Galactic Centre
Masen Lamb, Kim Venn, David Andersen +16
The chemical abundances for five metal-poor stars in and towards the Galactic bulge have been determined from H-band infrared spectroscopy taken with the RAVEN multi-object adaptiv…
The impact of the Large Magellanic Cloud on dark matter direct detection signals
Adam Smith-Orlik, Nima Ronaghi, Nassim Bozorgnia +9
We study the effect of the Large Magellanic Cloud (LMC) on the dark matter (DM) distribution in the Solar neighborhood, utilizing the Auriga magneto-hydrodynamical simulations of M…
LYRA ultra-faints: The emergence of faint dwarf galaxies in the presence of an early Lyman-Werner background
Shaun T. Brown, Azadeh Fattahi, Thales A. Gutcke +6
We present a suite of zoom-in cosmological hydrodynamical simulations of dwarf galaxies using the LYRA galaxy formation model with an extremely high mass resolution of $4\, \mathrm…
EAGLE-Auriga: effects of different subgrid models on the baryon cycle around Milky Way-mass galaxies
Ashley J. Kelly, Adrian Jenkins, Alis Deason +5
Modern hydrodynamical simulations reproduce many properties of the real universe. These simulations model various physical processes, but many of these are included using `subgrid…
The distinct stellar metallicity populations of simulated Local Group dwarfs
Anna Genina, Carlos S. Frenk, Alejandro Benitez-Llambay +4
A number of Local Group dwarf galaxies are known to have two spatially segregated stellar metallicity populations, a centrally concentrated metal-rich population and a more extende…
Baryonic solutions and challenges for cosmological models of dwarf galaxies
Laura V. Sales, Andrew Wetzel, Azadeh Fattahi
Galaxies and their dark-matter halos have posed several challenges to the Dark Energy plus Cold Dark Matter (LCDM) cosmological model. These discrepancies between observations and…
The star formation histories of dwarf galaxies in Local Group cosmological simulations
Ruth Digby, Julio F. Navarro, Azadeh Fattahi +6
We use the APOSTLE and Auriga cosmological simulations to study the star formation histories (SFHs) of field and satellite dwarf galaxies. Despite sizeable galaxy-to-galaxy scatter…
Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves
Isabel M. E. Santos-Santos, Julio F. Navarro, Andrew Robertson +7
We use a compilation of disc galaxy rotation curves to assess the role of the luminous component ("baryons") in the rotation curve diversity problem. As in earlier work, we find th…
The chosen few: the low mass halos that host faint galaxies
Till Sawala, Carlos S. Frenk, Azadeh Fattahi +8
Since reionization prevents star formation in most halos below 3 x 10^9 solar masses, dwarf galaxies only populate a fraction of existing dark matter halos. We use hydrodynamic cos…
The glow of annihilating dark matter in Omega Centauri
Anthony M. Brown, Richard Massey, Thomas Lacroix +3
Dark matter (DM) is the most abundant material in the Universe, but has so far been detected only via its gravitational effects. Several theories suggest that pairs of DM particles…
The Ophiuchus stream progenitor: a new type of globular cluster and its possible Sagittarius connection
James M. M. Lane, Julio F. Navarro, Azadeh Fattahi +2
The Ophiuchus stream is a short arc-like stellar feature of uncertain origin located kpc North of the Galactic centre. New proper motions from the second data relea…
Large Scale Structure and Environmental Effects on Dwarf Galaxy Growth
Mac M. McMullan, Sownak Bose, Azadeh Fattahi +3
Dwarf galaxies serve as key models for understanding galaxy assembly in the early universe, with their final properties influenced by environmental factors. Using the dark matter-o…
Velocity-dependent J-factors for Milky Way dwarf spheroidal analogues in cosmological simulations
Keagan Blanchette, Erin Piccirillo, Nassim Bozorgnia +5
We study the impact of the dark matter velocity distribution modelling on signals from velocity-dependent dark matter annihilation in Milky Way dwarf spheroidal galaxies. Using the…
Satellite mass functions and the faint end of the galaxy mass-halo mass relation in LCDM
Isabel M. E. Santos-Santos, Laura V. Sales, Azadeh Fattahi +1
The abundance of the faintest galaxies provides insight into the nature of dark matter and the process of dwarf galaxy formation. In the LCDM scenario, low mass halos are so numero…
The Orbital Ellipticity of Satellite Galaxies and the Mass of the Milky Way
Christopher Barber, Else Starkenburg, Julio Navarro +2
We use simulations of Milky Way-sized dark matter haloes from the Aquarius Project to investigate the orbits of substructure haloes likely, according to a semi-analytic galaxy form…
Subhalo destruction in the Apostle and Auriga simulations
Jack Richings, Carlos Frenk, Adrian Jenkins +7
N-body simulations make unambiguous predictions for the abundance of substructures within dark matter halos. However, the inclusion of baryons in the simulations changes the pictur…
Exploring the diversity and similarity of radially anisotropic Milky Way-like stellar haloes: implications for disrupted dwarf galaxy searches
Matthew D. A. Orkney, Chervin F. P. Laporte, Robert J. J. Grand +7
We investigate the properties of mergers comparable to the Gaia-Sausage-Enceladus (GSE) using cosmological hydrodynamical simulations of Milky Way-like galaxies. The merger progeni…
No cores in dark matter-dominated dwarf galaxies with bursty star formation histories
Sownak Bose, Carlos S. Frenk, Adrian Jenkins +10
Measurements of the rotation curves of dwarf galaxies are often interpreted as requiring a constant density core at the centre, at odds with the "cuspy" inner profiles predicted by…
Tidal stripping and the structure of dwarf galaxies in the Local Group
Azadeh Fattahi, Julio F. Navarro, Carlos S. Frenk +3
The shallow faint-end slope of the galaxy mass function is usually reproduced in CDM galaxy formation models by assuming that the fraction of baryons that turns into stars drop…
The mass of the Milky Way out to 100 kpc using halo stars
Alis J. Deason, Denis Erkal, Vasily Belokurov +9
We use a distribution function analysis to estimate the mass of the Milky Way out to 100 kpc using a large sample of halo stars. These stars are compiled from the literature, and t…
Self-interacting dark matter in the center of a Local Group dwarf galaxy and its satellites
Thales A. Gutcke, Giulia Despali, Stephanie O'Neil +3
We present a detailed comparison of a Local Group dwarf galaxy analogue evolved in two cosmological models: the standard CDM and a self-interacting dark matter (SIDM) model wit…
The Biggest Splash
Vasily Belokurov, Jason L. Sanders, Azadeh Fattahi +4
Using a large sample of bright nearby stars with accurate Gaia Data Release 2 astrometry and auxiliary spectroscopy we map out the properties of the principle Galactic components s…
Magellanic satellites in CDM cosmological hydrodynamical simulations of the Local Group
Isabel M. E. Santos-Santos, Azadeh Fattahi, Laura V. Sales +1
We use the APOSTLE CDM cosmological hydrodynamical simulations of the Local Group to study the recent accretion of massive satellites into the halo of Milky Way (MW)-sized gala…
Galactic tides and the Crater II dwarf spheroidal: a challenge to LCDM?
Alexandra Borukhovetskaya, Julio F. Navarro, Raphael Errani +1
The unusually low velocity dispersion and large size of Crater II pose a challenge to our understanding of dwarf galaxies in the Lambda Cold Dark Matter (LCDM) cosmogony. The low v…
The properties of "dark" ÎCDM halos in the Local Group
Alejandro BenÃtez-Llambay, Julio F. Navarro, Carlos S. Frenk +7
We examine the baryon content of low-mass ÎCDM halos using the APOSTLE cosmological hydrodynamical simulations. Most of these systems…
The Milky Way total mass profile as inferred from Gaia DR2
Marius Cautun, Alejandro Benitez-Llambay, Alis J. Deason +7
We determine the Milky Way (MW) mass profile inferred from fitting physically motivated models to the Gaia DR2 Galactic rotation curve and other data. Using various hydrodynamical…
The accreted stellar haloes of Milky Way-mass galaxies as a probe of the nature of the dark matter
Victor J. Forouhar Moreno, Azadeh Fattahi, Alis J. Deason +2
Galactic stellar haloes are largely composed of the remnants of galaxies accreted during the assembly of their host galaxies, and hence their properties reflect the mass spectrum a…
ARTEMIS emulator: exploring the effect of cosmology and galaxy formation physics on Milky Way-mass haloes and their satellites
Shaun T. Brown, Azadeh Fattahi, Ian G. McCarthy +3
We present the new ARTEMIS Emulator suite of high resolution (baryon mass of M) zoom-in simulations of Milky Way mass systems. Here, three ha…
Energy wrinkles and phase-space folds of the last major merger
Vasily Belokurov, Eugene Vasiliev, Alis J. Deason +5
Relying on the dramatic increase in the number of stars with full 6D phase-space information provided by the Gaia Data Release 3, we discover unambiguous signatures of phase-mixing…
Local Group analogues in a cosmological context -- I. Relating velocity structure to the cosmic web
Kai Wang, Peder Norberg, Azadeh Fattahi +1
Our Local Group, dominated in mass by the Milky Way (MW) and M31, provides a unique laboratory for testing CDM cosmology on small scales owing to its proximity. However, its co…
The low abundance and insignificance of dark discs in simulated Milky Way galaxies
Matthieu Schaller, Carlos S. Frenk, Azadeh Fattahi +3
We investigate the presence and importance of dark matter discs in a sample of 24 simulated Milky Way galaxies in the APOSTLE project, part of the EAGLE programme of hydrodynamic s…
Bent by baryons: the low mass galaxy-halo relation
Till Sawala, Carlos S. Frenk, Azadeh Fattahi +11
The relation between galaxies and dark matter halos is of vital importance for evaluating theoretical predictions of structure formation and galaxy formation physics. We show that…
Co-evolution of baryons and dark matter halos of LYRA dwarf galaxies
Joaquin Sureda, Shaun T. Brown, Azadeh Fattahi +4
We use the extremely high-resolution () LYRA cosmological galaxy formation simulations of six dwarf galaxies with at…
Missing dark matter in dwarf galaxies?
Kyle A. Oman, Julio F. Navarro, Laura V. Sales +5
We use cosmological hydrodynamical simulations of the APOSTLE project along with high-quality rotation curve observations to examine the fraction of baryons in ÎCDM haloes that co…
Dwarf stellar haloes: a powerful probe of small-scale galaxy formation and the nature of dark matter
Alis J. Deason, Sownak Bose, Azadeh Fattahi +3
We use N-body cosmological simulations and empirical galaxy models to study the merger history of dwarf-mass galaxies (with M_halo~10^10 M_Sun). Our input galaxy models describe th…
The lives and deaths of faint satellite galaxies around M31
Alex Merrow, Kyle A. Oman, Azadeh Fattahi
We present predictions for proper motions, infall times and times of first pericentric passage for 39 of M31's satellite galaxies. We estimate these by sampling satellite orbits fr…
Auriga Streams I: disrupting satellites surrounding Milky Way-mass haloes at multiple resolutions
Alexander H. Riley, Nora Shipp, Christine M. Simpson +8
In a hierarchically formed Universe, galaxies accrete smaller systems that tidally disrupt as they evolve in the host's potential. We present a complete catalogue of disrupting gal…
Can tides explain the low dark matter density in Fornax?
Anna Genina, Justin I. Read, Azadeh Fattahi +1
The low dark matter density in the Fornax dwarf galaxy is often interpreted as being due to the presence of a constant density `core', but it could also be explained by the effects…
Velocity-dependent J-factors for annihilation radiation from cosmological simulations
Erin Board, Nassim Bozorgnia, Louis E. Strigari +6
We determine the dark matter pair-wise relative velocity distribution in a set of Milky Way-like halos in the Auriga and APOSTLE simulations. Focusing on the smooth halo component,…
The low-mass end of the baryonic Tully-Fisher relation
Laura V. Sales, Julio F. Navarro, Kyle Oman +11
The scaling of disk galaxy rotation velocity with baryonic mass (the "Baryonic Tully-Fisher" relation, BTF) has long confounded galaxy formation models. It is steeper than the M ~…
The APOSTLE simulations: solutions to the Local Group's cosmic puzzles
Till Sawala, Carlos S. Frenk, Azadeh Fattahi +13
The Local Group of galaxies offer some of the most discriminating tests of models of cosmic structure formation. For example, observations of the Milky Way (MW) and Andromeda satel…
Implications of a contracted dark matter halo for the Milky Way's inferred virial mass
Diego Dado, Shaun T. Brown, Azadeh Fattahi +2
We investigate how reliably the global properties of Milky Way-mass dark matter haloes can be recovered from dynamical data over a limited radial range, particularly $\lesssim 30~\…
The tidal evolution of the Fornax dwarf spheroidal and its globular clusters
Alexandra Borukhovetskaya, Raphael Errani, Julio F. Navarro +2
The dark matter (DM) content of the Fornax dwarf spheroidal galaxy inferred from its kinematics is substantially lower than expected from LCDM cosmological simulations. We use N-bo…
Dark matter annihilation radiation in hydrodynamic simulations of Milky Way haloes
Matthieu Schaller, Carlos S. Frenk, Tom Theuns +8
We obtain predictions for the properties of cold dark matter annihilation radiation using high resolution hydrodynamic zoom-in cosmological simulations of Milky Way-like galaxies (…
A tale of two populations: surviving and destroyed dwarf galaxies and the build up of the Milky Way's stellar halo
Azadeh Fattahi, Alis J. Deason, Carlos S. Frenk +6
We use magneto-hydrodynamical simulations of Milky Way-mass haloes from the Auriga project to examine the properties of surviving and destroyed dwarf galaxies that are accreted by…
How Unusual is the Milky Way's Assembly History?
Tilly A. Evans, Azadeh Fattahi, Alis J. Deason +1
In the CDM model of structure formation galactic haloes build up by accretion of mass and mergers of smaller subunits. The most recent massive merger event experienced by the M…
Observing the stellar halo of Andromeda in cosmological simulations: the Auriga2PAndAS pipeline
Guillaume F. Thomas, Nicolas F. Martin, Azadeh Fattahi +10
We present a direct comparison of the Pan-Andromeda Archaeological Survey (PAndAS) observations of the stellar halo of M31 with the stellar halos of 6 galaxies from the Auriga simu…
Satellites Around Milky Way Analogs: Tension in the Number and Fraction of Quiescent Satellites Seen in Observations Versus Simulations
Ananthan Karunakaran, Kristine Spekkens, Kyle A. Oman +13
We compare the star-forming properties of satellites around Milky Way (MW) analogs from the Stage~II release of the Satellites Around Galactic Analogs Survey (SAGA-II) to those fro…
Stellar splashback: the edge of the intracluster light
Alis J. Deason, Kyle A. Oman, Azadeh Fattahi +8
We examine the outskirts of galaxy clusters in the C-EAGLE simulations to quantify the `edges' of the stellar and dark matter distribution. The radius of the steepest slope in the…
Apostle--Auriga: Effects of stellar feedback subgrid models on the evolution of angular momentum in disc galaxies
Hang Yang, Shihong Liao, Azadeh Fattahi +7
Utilizing the Apostle--Auriga simulations, which start from the same zoom-in initial conditions of Local Group-like systems but run with different galaxy formation subgrid models a…
Observing EAGLE galaxies with JWST: predictions for Milky Way progenitors and their building blocks
Tilly A Evans, Azadeh Fattahi, Alis J Deason +1
We present predictions, derived from the EAGLE LCDM cosmological hydrodynamical simulations, for the abundance and properties of galaxies expected to be detected at high redshift b…
Are there any extragalactic high speed dark matter particles in the Solar neighborhood?
Isabel Santos-Santos, Nassim Bozorgnia, Azadeh Fattahi +1
We use the APOSTLE suite of cosmological hydrodynamical simulations of the Local Group to examine the high speed tail of the local dark matter velocity distribution in simulated Mi…
The oldest and most metal poor stars in the APOSTLE Local Group simulations
Else Starkenburg, Kyle A. Oman, Julio F. Navarro +5
We examine the spatial distribution of the oldest and most metal poor stellar populations of Milky Way-sized galaxies using the APOSTLE cosmological hydrodynamical simulations of t…
The Mass-Discrepancy Acceleration Relation: a Natural Outcome of Galaxy Formation in Cold Dark Matter halos
Aaron D. Ludlow, Alejandro Benitez-Llambay, Matthieu Schaller +8
We analyze the total and baryonic acceleration profiles of a set of well-resolved galaxies identified in the EAGLE suite of hydrodynamic simulations. Our runs start from the same i…
On the correlation between the local dark matter and stellar velocities
Nassim Bozorgnia, Azadeh Fattahi, David G. Cerdeno +5
The dark matter velocity distribution in the Solar neighbourhood is an important astrophysical input which enters in the predicted event rate of dark matter direct detection experi…
Local Group galaxies emerge from the dark
Till Sawala, Carlos S. Frenk, Azadeh Fattahi +13
The "Lambda Cold Dark Matter" (LCDM) model of cosmic structure formation is eminently falsifiable: once its parameters are fixed on large scales, it becomes testable in the nearby…
Magnetic field amplification in cosmological zoom simulations from dwarf galaxies to galaxy groups
Ruediger Pakmor, Rebekka Bieri, Freeke van de Voort +6
Magnetic fields are ubiquitous in the Universe. Recently, cosmological simulations of galaxies have successfully begun to incorporate magnetic fields and their evolution in galaxie…
The velocity anisotropy of the Milky Way satellite system
Alexander H. Riley, Azadeh Fattahi, Andrew B. Pace +9
We analyse the orbital kinematics of the Milky Way (MW) satellite system utilizing the latest systemic proper motions for 38 satellites based on data from Gaia Data Release 2. Comb…
The origin of galactic metal-rich stellar halo components with highly eccentric orbits
Azadeh Fattahi, Vasily Belokurov, Alis J. Deason +6
Using the astrometry from the ESA's Gaia mission, previous works have shown that the Milky Way stellar halo is dominated by metal-rich stars on highly eccentric orbits. To shed lig…
The core-cusp problem: a matter of perspective
Anna Genina, Alejandro Benitez-Llambay, Carlos S. Frenk +6
The existence of two kinematically and chemically distinct stellar subpopulations in the Sculptor and Fornax dwarf galaxies offers the opportunity to constrain the density profile…
Stirring Things Up: Bar-induced substructures in the stellar halo of a cosmological Milky Way analogue
Thomas Tomlinson, Francesca Fragkoudi, Andreia Carrillo +8
The stellar halo of the Milky Way contains the remnants of past accretion events, which could be detectable as substructures in the classical integrals of motion space, such as ene…
Columba: isolated dwarf galaxy populations in diverse cosmological environments simulated with a cold interstellar medium
Jemima M. Briggs, Azadeh Fattahi, Robert A. Crain +7
We introduce a suite of LambdaCDM cosmological, hydrodynamical simulations that track the evolution of a large population of dwarf galaxies. The suite comprises zoom-in simulations…
From order to chaos: the blurred out metallicity gradient of the Gaia-Enceladus/Sausage progenitor
Andreia Carrillo, Alis J. Deason, Azadeh Fattahi +2
The powerful combination of Gaia with other Milky Way large survey data has ushered in a deeper understanding of the assembly history of our Galaxy, which is marked by the accretio…
What galaxy masses perturb the local cosmic expansion?
Jorge Peñarrubia, Azadeh Fattahi
We use 12 cosmological -body simulations of Local Group systems (the Apostle models) to inspect the relation between the virial mass of the main haloes ( and $M_{…