AuriDESI: Mock Catalogues for the DESI Milky Way Survey
arXiv:2406.08921 · doi:10.1093/mnras/stae1415
Abstract
The Dark Energy Spectroscopic Instrument Milky Way Survey (DESI MWS) will explore the assembly history of the Milky Way by characterising remnants of ancient dwarf galaxy accretion events and improving constraints on the distribution of dark matter in the outer halo. We present mock catalogues that reproduce the selection criteria of MWS and the format of the final MWS data set. These catalogues can be used to test methods for quantifying the properties of stellar halo substructure and reconstructing the Milky Way's accretion history with the MWS data, including the effects of halo-to-halo variance. The mock catalogues are based on a phase-space kernel expansion technique applied to star particles in the Auriga suite of six high-resolution CDM magneto-hydrodynamic zoom-in simulations. They include photometric properties (and associated errors) used in DESI target selection and the outputs of the MWS spectral analysis pipeline (radial velocity, metallicity, surface gravity, and temperature). They also include information from the underlying simulation, such as the total gravitational potential and information on the progenitors of accreted halo stars. We discuss how the subset of halo stars observable by MWS in these simulations corresponds to their true content and properties. These mock Milky Ways have rich accretion histories, resulting in a large number of substructures that span the whole stellar halo out to large distances and have substantial overlap in the space of orbital energy and angular momentum.
arXiv commentAccepted for publication in MNRAS, 31 pages, 27 figues, 7 tables. The mock catalogues are available at https://data.desi.lbl.gov/public/papers/mws/auridesi/v1
References in corpus (90)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- Astropy: A Community Python Package for Astronomy
- Gaia Data Release 2. Summary of the contents and survey properties
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- The Gaia mission
- HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
- PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
- Populating a cluster of galaxies - I. Results at z=0
- The 2.5 m Telescope of the Sloan Digital Sky Survey
- The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8
- The Aquarius Project: the subhalos of galactic halos
- The Galaxy in Context: Structural, Kinematic and Integrated Properties
- Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
- The Milky Way Tomography with SDSS: I. Stellar Number Density Distribution
- The merger that led to the formation of the Milky Way's inner stellar halo and thick disk
- SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
- Tracing Galaxy Formation with Stellar Halos I: Methods
- Co-formation of the Galactic disc and the stellar halo
- The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies
- Kinematics of Metal-Poor Stars in the Galaxy. III. Formation of the Stellar Halo and Thick Disk as Revealed from a Large Sample of Non-Kinematically Selected Stars
- Improving PARSEC models for very low mass stars
- PARSEC evolutionary tracks of massive stars up to at metallicities 0.00010.04
- Two Stellar Components in the Halo of the Milky Way
- Reconciling dwarf galaxies with LCDM cosmology: Simulating a realistic population of satellites around a Milky Way-mass galaxy
- The Milky Way Tomography with SDSS: II. Stellar Metallicity
- Galactic stellar haloes in the CDM model
- The Auriga Project: the properties and formation mechanisms of disc galaxies across cosmic time
- Two distinct halo populations in the solar neighborhood. Evidence from stellar abundance ratios and kinematics
- New PARSEC evolutionary tracks of massive stars at low metallicity: testing canonical stellar evolution in nearby star forming dwarf galaxies
- The accretion origin of the Milky Way's stellar halo
- A Spectroscopic Study of the Ancient Milky Way: F- and G-Type Stars in the Third Data Release of the Sloan Digital Sky Survey
- Evolution of asymptotic giant branch stars I. Updated synthetic TP-AGB models and their basic calibration
- Sagittarius: The Nearest Dwarf Galaxy
- The Dual Origin of Stellar Halos
- Hierarchical galaxy formation and substructure in the Galaxy's stellar halo
- Galaxia: a code to generate a synthetic survey of the Milky Way
- 4MOST: Project overview and information for the First Call for Proposals
- The Milky Way stellar halo out to 40 kpc : Squashed, broken but smooth
- Cosmological simulations of the formation of the stellar haloes around disc galaxies
- Substructure revealed by RR Lyraes in SDSS Stripe 82
- The stellar halo of the Galaxy
- Mapping the substructure in the Galactic halo with the next generation of astrometric satellites
- The Galaxy and its stellar halo: insights on their formation from a hybrid cosmological approach
- Quenching and ram pressure stripping of simulated Milky Way satellite galaxies
- From dawn till disk: Milky Way's turbulent youth revealed by the APOGEE+Gaia data
- The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation
- Accurate Stellar Kinematics at Faint Magnitudes: application to the Bootes~I dwarf spheroidal galaxy
- Gaia reveals a metal-rich in-situ component of the local stellar halo
- The Auriga Stellar Haloes: Connecting stellar population properties with accretion and merging history
- Broken and unbroken: the Milky Way and M31 stellar haloes
- Contributions to the accreted stellar halo: an atlas of stellar deposition
- The Shape and Profile of the Milky Way Halo as Seen by the CFHT Legacy Survey
- Reconstructing the Last Major Merger of the Milky Way with the H3 Survey
- Mapping the Stellar Halo with the H3 Spectroscopic Survey
- Overview of the DESI Milky Way Survey
- The Target-selection Pipeline for the Dark Energy Spectroscopic Instrument
- Formation of In Situ Stellar Haloes in Milky Way-Mass Galaxies
- The cold veil of the Milky Way stellar halo
- Apocenter Pile-Up: Origin of the Stellar Halo Density Break
- Origin of chemically distinct discs in the Auriga cosmological simulations
- The origin of galactic metal-rich stellar halo components with highly eccentric orbits
- Synthetic Gaia surveys from the FIRE cosmological simulations of Milky Way-mass galaxies
- Timing the Early Assembly of the Milky Way with the H3 Survey
- The Eating Habits of Milky Way Mass Halos: Destroyed Dwarf Satellites and the Metallicity Distribution of Accreted Stars
- The Halo's Ancient Metal-Rich Progenitor Revealed with BHB Stars
- galstreams: A Library of Milky Way Stellar Stream Footprints and Tracks
- Fashionably Late? Building up the Milky Way's Inner Halo
- Determining the full satellite population of a Milky Way-mass halo in a highly resolved cosmological hydrodynamic simulation
- GASTRO library I: the simulated chemodynamical properties of several GSE-like stellar halos
- Aurigaia: mock Gaia DR2 stellar catalogues from the Auriga cosmological simulations
- Multi-Dimensional Density Estimation and Phase Space Structure Of Dark Matter Halos
- The effects of dynamical substructure on Milky Way mass estimates from the high velocity tail of the local stellar halo
- On the stellar halo metallicity profile of Milky Way-like galaxies in the Auriga simulations
- Overview of the Dark Energy Spectroscopic Instrument
- Creating mock catalogues of stellar haloes from cosmological simulations
- The Stellar Halo in the Inner Milky Way: Predicted Shape and Kinematics
- Streams on FIRE: Populations of Detectable Stellar Streams in the Milky Way and FIRE
- Stellar mass-gap as a probe of halo assembly history and concentration: youth hidden among old fossils
- Correcting for Fibre Assignment Incompleteness in the DESI Bright Galaxy Survey
- The stellar kinematics of co-rotating spiral arms in Gaia mock observations
- Simulating cosmological substructure in the solar neighbourhood
- The nature of the Milky Way's stellar halo revealed by the three integrals of motion
- The globular cluster system of the Auriga simulations
- Comparing semi-analytic particle tagging and hydrodynamical simulations of the Milky Way's stellar halo
- Tidal features of classical Milky Way satellites in a CDM universe
- What is the Milky Way outer halo made of? High resolution spectroscopy of distant red giants
- The Early Merger that Made the Galaxy's Stellar Halo
- ProtoDESI: First On-Sky Technology Demonstration for the Dark Energy Spectroscopic Instrument
- Synthetic Gaia DR3 surveys from the FIRE cosmological simulations of Milky-Way-mass galaxies