Publications (87)
Two-Point Separation Functions for Modeling Wide Binary Systems in Nearby Dwarf Galaxies
Christopher Kervick, Matthew G. Walker, Jorge Peñarrubia +1
Abundance Analysis of Stars at Large Radius in the Sextans Dwarf Spheroidal Galaxy
Ian U. Roederer, Andrew B. Pace, Vinicius M. Placco +5
The Velocity Dispersion Profile of the Remote Dwarf Spheroidal Galaxy Leo I: A Tidal Hit and Run?
Mario Mateo, Edward W. Olszewski, Matthew G. Walker
Rotation and H$α$ emission in a young SMC cluster: a spectroscopic view of NGC 330
Paul I. Cristofari, Andrea K. Dupree, Antonino P. Milone +4
A Method for Measuring (Slopes of) the Mass Profiles of Dwarf Spheroidal Galaxies
Matthew G. Walker, Jorge Peñarrubia
Abundances of Neutron-Capture Elements in 62 Stars in the Globular Cluster Messier 15
Jonathan Cabrera Garcia, Charli M. Sakari, Ian U. Roederer +7
An Expanded Chemo-dynamical Sample of Red Giants in the Bar of the Large Magellanic Cloud
Ying-Yi Song, Mario Mateo, Matthew G. Walker +1
The impact of dark matter cusps and cores on the satellite galaxy population around spiral galaxies
Jorge Penarrubia, Andrew J. Benson, Matthew G. Walker +3
Tailored mass estimators for Milky Way dwarf Spheroidals
Sofia L. Splawska, Raphaël Errani, Jorge Peñarrubia +1
The Detailed Science Case for the Maunakea Spectroscopic Explorer, 2019 edition
The MSE Science Team, Carine Babusiaux, Maria Bergemann +258
Stellar multiplicity and stellar rotation: Insights from APOGEE
Christine Mazzola Daher, Carles Badenes, Jamie Tayar +18
Wide binaries in ultra-faint galaxies: a window onto dark matter on the smallest scales
Jorge Peñarrubia, Aaron D. Ludlow, Julio Chanamé +1
Constraining Self-Interacting Dark Matter with the Milky Way's dwarf spheroidals
Jesus Zavala, Mark Vogelsberger, Matthew G. Walker
The viability of ultralight bosonic dark matter in dwarf galaxies
Isabelle S. Goldstein, Savvas M. Koushiappas, Matthew G. Walker
Bayesian analysis of resolved stellar spectra: application to MMT/Hectochelle Observations of the Draco dwarf spheroidal
Matthew G. Walker, Edward W. Olszewski, Mario Mateo
Snake in the Clouds: A new nearby dwarf galaxy in the Magellanic bridge
Sergey E. Koposov, Matthew G. Walker, Vasily Belokurov +9
A low pre-infall mass for the Carina dwarf galaxy from disequilibrium modelling
UÄur Ural, Mark I. Wilkinson, Justin I. Read +1
A Comprehensive Search for Dark Matter Annihilation in Dwarf Galaxies
Alex Geringer-Sameth, Savvas M. Koushiappas, Matthew G. Walker
Gravothermal expansion of dwarf spheroidal galaxies heated by dark subhaloes
Jorge Peñarrubia, Raphaël Errani, Eduardo Vitral +1
Magellan/M2FS Spectroscopy of Galaxy Clusters: Stellar Population Model and Application to Abell 267
Evan Tucker, Matthew G. Walker, Mario Mateo +4
Magellan/M2FS Spectroscopy of Tucana 2 and Grus 1
Matthew G. Walker, Mario Mateo, Edward W. Olszewski +8
Dynamical Masses and Mass-to-light Ratios of Resolved Massive Star Clusters. I. NGC 419 and NGC 1846
Ying-Yi Song, Mario Mateo, A. D. Mackey +4
Velocity Dispersion Profiles of Seven Dwarf Spheroidal Galaxies
Matthew G. Walker, Mario Mateo, Edward W. Olszewski +4
On Kinematic Substructure in the Sextans Dwarf Spheroidal Galaxy
Matthew G. Walker, Mario Mateo, Edward W. Olszewski +3
Signatures of Tidal Disruption in Ultra-Faint Dwarf Galaxies: A Combined HST, Gaia, and MMT/Hectochelle Study of Leo V
Burçin Mutlu-Pakdil, David J. Sand, Matthew G. Walker +10
Chemical Complexity in the Eu-enhanced Monometallic Globular Cluster NGC 5986
Christian I. Johnson, Nelson Caldwell, R. Michael Rich +4
The coupling between the core/cusp and missing satellite problems
Jorge Peñarrubia, Andrew Pontzen, Matthew G. Walker +1
Exploring the Chemical Composition and Double Horizontal Branch of the Bulge Globular Cluster NGC 6569
Christian I. Johnson, R. Michael Rich, Nelson Caldwell +4
Detailed Chemical Abundances in the r-Process-Rich Ultra-Faint Dwarf Galaxy Reticulum 2
Ian U. Roederer, Mario Mateo, John I. Bailey +10
A Magellan M2FS Spectroscopic Survey of Galaxies at 5.5<z<6.8: Program Overview and a Sample of the Brightest Lyman-alpha Emitters
Linhua Jiang, Yue Shen, Fuyan Bian +16
A statistical method for measuring the Galactic potential and testing gravity with cold tidal streams
Jorge Peñarrubia, Sergey E. Koposov, Matthew G. Walker
Space Motions of the Dwarf Spheroidal Galaxies Draco and Sculptor based on HST Proper Motions with ~10-year Time Baseline
Sangmo Tony Sohn, Ekta Patel, Gurtina Besla +5
Are stellar over-densities in dwarf galaxies the "smoking gun" of triaxial dark matter haloes?
Jorge Penarrubia, Matthew G. Walker, Gerard Gilmore
The Nature of the Density Clump in the Fornax Dwarf Spheroidal Galaxy
Edward W. Olszewski, Mario Mateo, Jason Harris +3
Spectroscopic Confirmation of the Sixth Globular Cluster in the Fornax Dwarf Spheroidal Galaxy
Andrew B. Pace, Matthew G. Walker, Sergey E. Koposov +5
Stellar Cores Live Long and Prosper in Cuspy Dark Matter Halos
Jenni Häkkinen, Alexander Rawlings, Till Sawala +1
Tidal disruption of globular clusters in dwarf galaxies with triaxial dark matter haloes
Jorge Penarrubia, Matthew G. Walker, Gerard Gilmore
Magellan/M2FS Spectroscopy of the Reticulum 2 Dwarf Spheroidal Galaxy
Matthew G. Walker, Mario Mateo, Edward W. Olszewski +4
Indication of Gamma-ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II
Alex Geringer-Sameth, Matthew G. Walker, Savvas M. Koushiappas +4
The Close Binary Fraction as a Function of Stellar Parameters in APOGEE: A Strong Anti-Correlation With $α$ Abundances
Christine N. Mazzola, Carles Badenes, Maxwell Moe +20
Estimating Dark Matter Distributions
Xiao Wang, Michael Woodroofe, Matthew G. Walker +2
Structural Diversity Among the Milky Way's Dwarf Spheroidal Satellites
Matthew G. Walker, Raphaël Errani, Andrew B. Pace +3
Stellar kinematics of dwarf galaxies from multi-epoch spectroscopy: application to Triangulum II
Rachel Buttry, Andrew B. Pace, Sergey E. Koposov +9
Crater 2: An Extremely Cold Dark Matter Halo
Nelson Caldwell, Matthew G. Walker, Mario Mateo +6
Dwarf spheroidal galaxy kinematics and spiral galaxy scaling laws
Paolo Salucci, Mark I. Wilkinson, Matthew G. Walker +5
Dark Matter in the Milky Way's Dwarf Spheroidal Satellites
Matthew G. Walker
Light and Heavy Element Abundance Variations in the Outer Halo Globular Cluster NGC 6229
Christian I. Johnson, Nelson Caldwell, R. Michael Rich +1
Micro galaxies in LCDM
Raphaël Errani, Rodrigo Ibata, Julio F. Navarro +2
A Reverberation-Based Mass for the Central Black Hole in NGC 4151
Misty C. Bentz, Kelly D. Denney, Edward M. Cackett +15
The Kinematics, Metallicities, and Orbits of Six Recently Discovered Galactic Star Clusters with Magellan/M2FS Spectroscopy
Andrew B. Pace, Sergey E. Koposov, Matthew G. Walker +9
A common mass scale for satellite galaxies of the Milky Way
Louis E. Strigari, James S. Bullock, Manoj Kaplinghat +4
A Hubble Space Telescope Study of the Enigmatic Milky Way Halo Globular Cluster Crater
Daniel R. Weisz, Sergey E. Koposov, Andrew E. Dolphin +6
Magellan/M2FS and MMT/Hectochelle Spectroscopy of Dwarf Galaxies and Faint Star Clusters within the Galactic Halo
Matthew G. Walker, Nelson Caldwell, Mario Mateo +5
A dynamical model of the local cosmic expansion
Jorge Peñarrubia, Yin-Zhe Ma, Matthew G. Walker +1
Clean Kinematic Samples in Dwarf Spheroidals: An Algorithm for Evaluating Membership and Estimating Distribution Parameters When Contamination is Present
Matthew G. Walker, Mario Mateo, Edward W. Olszewski +2
Measuring the slopes of mass profiles for dwarf spheroidals in triaxial CDM potentials
Chervin F. P. Laporte, Matthew G. Walker, Jorge Peñarrubia
The SLUGGS Survey: Multi-population dynamical modelling of the elliptical galaxy NGC 1407 from stars and globular clusters
Vincenzo Pota, Aaron J. Romanowsky, Jean P. Brodie +7
Signatures of dark subhalos in dwarf spheroidal galaxies: I. Fluctuations in surface density
Eduardo Vitral, Jorge Peñarrubia, Matthew G. Walker
Multiplicity Statistics of Stars in the Sagittarius Dwarf Spheroidal Galaxy: Comparison to the Milky Way
Victoria Bonidie, Travis Court, Christine Mazzola Daher +17
Comparing the Dark Matter Halos of Spiral, Low Surface Brightness and Dwarf Spheroidal Galaxies
Matthew G. Walker, Stacy S. McGaugh, Mario Mateo +2
Systemic Proper Motions of Milky Way Satellites from Stellar Redshifts: the Carina, Fornax, Sculptor and Sextans Dwarf Spheroidals
Matthew G. Walker, Mario Mateo, Edward W. Olszewski
Uniform Modelling of the Stellar Density of Thirteen Tidal Streams within the Galactic Halo
Jeffrey M. Patrick, Sergey E. Koposov, Matthew G. Walker
NGC 5548 in a Low-Luminosity State: Implications for the Broad-Line Region
Misty C. Bentz, Kelly D. Denney, Edward M. Cackett +15
HSTPROMO Internal Proper Motion Kinematics of Dwarf Spheroidal Galaxies: I. Velocity Anisotropy and Dark Matter Cusp Slope of Draco
Eduardo Vitral, Roeland P. van der Marel, Sangmo Tony Sohn +8
Galaxy Cluster Mass Estimates in the Presence of Substructure
Evan Tucker, Matthew G. Walker, Mario Mateo +3
Systematics in virial mass estimators for pressure-supported systems
Raphaël Errani, Jorge Peñarrubia, Matthew G. Walker
Stellar Multiplicity Meets Stellar Evolution And Metallicity: The APOGEE View
Carles Badenes, Christine Mazzola, Todd A. Thompson +21
Binary stars as probes of dark substructures in dwarf galaxies
Jorge Penarrubia, Sergey E. Koposov, Matthew G. Walker +3
Impulsive mixing of stellar populations in dwarf spheroidal galaxies
Raphaël Errani, Matthew G. Walker, Simon Rozier +2
Dynamical masses and mass-to-light ratios of resolved massive star clusters -- II. Results for 26 star clusters in the Magellanic Clouds
Ying-Yi Song, Mario Mateo, John I. Bailey +5
Structure Formation Models Weaken Limits on WIMP Dark Matter from Dwarf Spheroidal Galaxies
Shin'ichiro Ando, Alex Geringer-Sameth, Nagisa Hiroshima +3
Capture of field stars by dark substructures
Jorge Peñarrubia, Raphaël Errani, Matthew G. Walker +2
The Mass of the Black Hole in the Seyfert 1 Galaxy NGC 4593 from Reverberation Mapping
Kelly D. Denney, Misty C. Bentz, Bradley M. Peterson +15
Collisional Dynamics of Stars and Dark Matter in Ultra-Faint Galaxies
Raphaël Errani, Nicolas Esser, Jorge Peñarrubia +1
Leo V: Spectroscopy of a Distant and Disturbed Satellite
Matthew G. Walker, Vasily Belokurov, N. Wyn Evans +4
Is the Universe Simpler than LCDM?
Matthew G. Walker, Abraham Loeb
Searching for dark matter in X-rays: how to check the dark matter origin of a spectral feature
Alexey Boyarsky, Oleg Ruchayskiy, Dmytro Iakubovskyi +3
Offset of M54 from the Sagittarius Dwarf Spheroidal Galaxy
Zhaozhou An, Matthew G. Walker, Andrew B. Pace
A Chemical Composition Survey of the Iron-Complex Globular Cluster NGC 6273 (M 19)
Christian I. Johnson, Nelson Caldwell, R. Michael Rich +5
The Most Metal-poor Stars in Omega Centauri (NGC 5139)
Christian I. Johnson, Andrea K. Dupree, Mario Mateo +3
Stellar Mass Segregation in Dark Matter Halos
Raphaël Errani, Jorge Peñarrubia, Matthew G. Walker
The Michigan/MIKE Fiber System Survey of Stellar Radial Velocities in Dwarf Spheroidal Galaxies: Acquisition and Reduction of Data
Matthew G. Walker, Mario Mateo, Edward W. Olszewski +3
Astrophysical Tests of Dark Matter with Maunakea Spectroscopic Explorer
Ting S. Li, Manoj Kaplinghat, Keith Bechtol +27
Internal Kinematics of the Fornax Dwarf Spheroidal Galaxy
Matthew G. Walker, Mario Mateo, Edward W. Olszewski +3
A Universal Mass Profile for Dwarf Spheroidal Galaxies?
Matthew G. Walker, Mario Mateo, Edward W. Olszewski +3
Astrophysical explanations of suspected dark matter signals in dwarf galaxies
Alex Geringer-Sameth, Savvas M. Koushiappas, Matthew G. Walker +3
Stellar Velocities in the Carina, Fornax, Sculptor and Sextans dSph Galaxies: Data from the Magellan/MMFS Survey
Matthew G. Walker, Mario Mateo, Edward Olszewski