Publications (93)
The PAndAS view of the Andromeda satellite system - I. A Bayesian search for dwarf galaxies using spatial and color-magnitude information
Nicolas F. Martin, Rodrigo A. Ibata, Alan W. McConnachie +5
Spectroscopy of the three distant Andromedan satellites Cassiopeia III, Lacerta I, and Perseus I
Nicolas F. Martin, Kenneth C. Chambers, Michelle L. M. Collins +10
The Comparative Chemical Evolution of an Isolated Dwarf Galaxy: A VLT and Keck Spectroscopic Survey of WLM
Ryan Leaman, Kim A. Venn, Alyson M. Brooks +8
Was SN1997ff at z~1.7 magnified by gravitational lensing?
Geraint F. Lewis, Rodrigo A. Ibata
The Resolved Structure and Dynamics of an Isolated Dwarf Galaxy: A VLT and Keck Spectroscopic Survey of WLM
Ryan Leaman, Kim A. Venn, Alyson M. Brooks +7
Density Variations in the NW Star Stream of M31
R. G. Carlberg, Harvey B. Richer, Alan W. McConnachie +10
Pristine Dwarf-Galaxy Survey I: A detailed photometric and spectroscopic study of the very metal-poor Draco II satellite
Nicolas Longeard, Nicolas Martin, Else Starkenburg +17
AAT/WFI observations of the Extragalactic H I Cloud HIPASS J1712-64
Geraint F. Lewis, Michael J. Irwin, Rodrigo A. Ibata +1
Stability of Satellite Planes in M31 II: Effects of the Dark Subhalo Population
Nuwanthika Fernando, Veronica Arias, Geraint F. Lewis +2
Spatially resolved STIS spectra of the gravitationally lensed BAL quasar APM08279+5255: the nature of component C and evidence for microlensing
Geraint F. Lewis, Rodrigo A. Ibata, Sara L. Ellison +4
PAndAS' cubs: discovery of two new dwarf galaxies in the surroundings of the Andromeda and Triangulum galaxies
Nicolas F. Martin, Alan W. McConnachie, Mike Irwin +10
Submillimeter Observations of the Ultraluminous BAL Quasar APM 08279+5255
Geraint F. Lewis, Scott C. Chapman, Rodrigo A. Ibata +2
The AAT/WFI survey of the Monoceros Ring and Canis Major Dwarf galaxy: II. from l = (280 - 025)deg
Blair C. Conn, Richard R. Lane, Geraint F. Lewis +5
Comparing the observable properties of dwarf galaxies on and off the Andromeda plane
Michelle L. M. Collins, Nicolas F. Martin, R. M. Rich +6
Phlegethon, a nearby $75°$-long retrograde stellar stream
Rodrigo A. Ibata, Khyati Malhan, Nicolas F. Martin +1
Reliable mass calculation in spherical gravitating systems
Foivos I. Diakogiannis, Geraint F. Lewis, Rodrigo A. Ibata +3
Photometric Monitoring of the Gravitationally Lensed Ultraluminous BAL Quasar APM08279+5255
Geraint F. Lewis, Russell M. Robb, Rodrigo A. Ibata
Velocity anti-correlation of diametrically opposed galaxy satellites in the low redshift universe
Neil G. Ibata, Rodrigo A. Ibata, Benoit Famaey +1
The remnants of galaxy formation from a panoramic survey of the region around M31
Alan W. McConnachie, Michael J. Irwin, Rodrigo A. Ibata +26
The Stellar Halo Metallicity - Luminosity Relationship for Spiral Galaxies
Agostino Renda, Brad K. Gibson, Mustapha Mouhcine +4
STREAMFINDER II: A possible fanning structure parallel to the GD-1 stream in Pan-STARRS1
Khyati Malhan, Rodrigo A. Ibata, Bertrand Goldman +3
Considerations on how to investigate planes of satellite galaxies
Marcel S. Pawlowski, Jörg Dabringhausen, Benoit Famaey +11
A rogues gallery of Andromeda's dwarf galaxies I. A predominance of red horizontal branches
Nicolas F. Martin, Daniel R. Weisz, Saundra M. Albers +11
Is Draco II one of the faintest dwarf galaxies? First study from Keck/DEIMOS spectroscopy
Nicolas F. Martin, Marla Geha, Rodrigo A. Ibata +8
PAndAS in the mist: The stellar and gaseous mass within the halos of M31 and M33
Geraint F. Lewis, Robert Braun, Alan W. McConnachie +12
Probing the Atmospheres of Planets Orbiting Microlensed Stars via Polarization Variability
Geraint F. Lewis, Rodrigo A. Ibata
Ghostly Tributaries to the Milky Way: Charting the Halo's Stellar Streams with the Gaia DR2 catalogue
Khyati Malhan, Rodrigo A. Ibata, Nicolas F. Martin
The large-scale structure of the halo of the Andromeda Galaxy Part I: global stellar density, morphology and metallicity properties
Rodrigo A. Ibata, Geraint F. Lewis, Alan W. McConnachie +14
Major Substructure in the M31 Outer Halo: Distances and Metallicities along the Giant Stellar Stream
Anthony R. Conn, Brendan McMonigal, Nicholas F. Bate +9
NICMOS and VLA Observations of the Gravitatonally Lensed Ultraluminous BAL Quasar APM~08279+5255: Detection of a Third Image
Rodrigo A. Ibata, Geraint F. Lewis, Michael J. Irwin +2
A thousand shadows of Andromeda: rotating planes of satellites in the Millennium-II cosmological simulation
Rodrigo A. Ibata, Neil G. Ibata, Geraint F. Lewis +5
White Dwarfs in Globular Clusters: HST Observations of M4
Harvey B. Richer, Gregory G. Fahlman, Rodrigo A. Ibata +11
Quasar Image Shifts due to Gravitational Microlensing
Geraint F. Lewis, Rodrigo A. Ibata
Galactic cartography with SkyMapper: I. Population sub-structure and the stellar number density of the inner halo
Zhen Wan, Prajwal R. Kafle, Geraint F. Lewis +3
The Lopsidedness of Satellite Galaxy Systems in $Î$CDM simulations
Marcel S. Pawlowski, Rodrigo A. Ibata, James S. Bullock
Gravitational microlensing of quasar Broad Line Regions: the influence of fractal structures
Geraint F. Lewis, Rodrigo A. Ibata
The Three-Dimensional Structure of the M31 Satellite System; Strong Evidence for an Inhomogeneous Distribution of Satellites
Anthony R. Conn, Geraint F. Lewis, Rodrigo A. Ibata +9
Halo globular clusters observed with AAOmega: dark matter content, metallicity and tidal heating
Richard R. Lane, László L. Kiss, Geraint F. Lewis +6
AAOmega spectroscopy of 29 351 stars in fields centered on ten Galactic globular clusters
Richard R. Lane, László L. Kiss, Geraint F. Lewis +5
A New Faint Milky Way Satellite Discovered in the Pan-STARRS1 3 pi Survey
Benjamin P. M. Laevens, Nicolas F. Martin, Rodrigo A. Ibata +21
The PAndAS Field of Streams: stellar structures in the Milky Way halo toward Andromeda and Triangulum
Nicolas F. Martin, Rodrigo A. Ibata, R. Michael Rich +16
Internal Alignment of the Halos of Disk Galaxies in Cosmological Hydrodynamic Simulations
Jeremy Bailin, Daisuke Kawata, Brad K. Gibson +8
The Search for Cosmological Black Holes: A Surface Brightness Variability Test
Geraint F. Lewis, Rodrigo A. Ibata
Eppur si muove: Positional and kinematic correlations of satellite pairs in the low Z universe
Rodrigo A. Ibata, Benoit Famaey, Geraint F. Lewis +2
Feeling the pull, a study of natural Galactic accelerometers. I: photometry of the delicate stellar stream of the Palomar 5 globular cluster
Rodrigo A. Ibata, Geraint F. Lewis, Nicolas F. Martin
A Vast Thin Plane of Co-rotating Dwarf Galaxies Orbiting the Andromeda Galaxy
Rodrigo A. Ibata, Geraint F. Lewis, Anthony R. Conn +13
Hubble Space Telescope Observations of White Dwarfs in the Globular Cluster M4
Harvey B. Richer, Gregory G. Fahlman, Rodrigo A. Ibata +9
A Bayesian Approach to Locating the Red Giant Branch Tip Magnitude (Part II); Distances to the Satellites of M31
Anthony R. Conn, Rodrigo A. Ibata, Geraint F. Lewis +10
The AAT/WFI survey of the Monoceros Ring and Canis Major Dwarf galaxy: I. from l = (193 - 276)o
Blair C. Conn, Richard R. Lane, Geraint F. Lewis +8
The Pristine survey I: Mining the Galaxy for the most metal-poor stars
Else Starkenburg, Nicolas Martin, Kris Youakim +22
APM 08279+5255: an ultraluminous BAL quasar at a redshift z=3.87
Michael J. Irwin, Rodrigo A. Ibata, Geraint F. Lewis +1
HST Photometry of the Globular Cluster M4
Rodrigo A. Ibata, Harvey B. Richer, Gregory G. Fahlman +5
Cosmology on a Mesh
Stuart P. D. Gill, Alexander Knebe, Brad K. Gibson +3
Constraining the Milky Way Halo Potential with the GD-1 stellar stream
Khyati Malhan, Rodrigo A. Ibata
A radial velocity survey of low Galactic latitude structures: II. The Monoceros Ring behind the Canis Major dwarf galaxy
Blair C. Conn, Nicolas F. Martin, Geraint F. Lewis +3
Anisotropy in the Distribution of Satellite Galaxy Orbits
Alexander Knebe, Stuart P. D. Gill, Brad K. Gibson +3
Kinematics of the Tucana Dwarf Galaxy: An Unusually Dense Dwarf in the Local Group
Alexandra L. Gregory, Michelle L. M. Collins, Justin I. Read +5
PAndAS' progeny: extending the M31 dwarf galaxy cabal
Jenny C. Richardson, Mike Irwin, Alan W. McConnachie +8
Dynamical Modeling of NGC 6809: Selecting the best model using Bayesian Inference
Foivos I. Diakogiannis, Geraint F. Lewis, Rodrigo A. Ibata
Resolving the mass--anisotropy degeneracy of the spherically symmetric Jeans equation II: optimum smoothing and model validation
Foivos I. Diakogiannis, Geraint F. Lewis, Rodrigo A. Ibata
The INT/WFC survey of the Monoceros Ring: Accretion origin or Galactic Anomaly?
Blair C. Conn, Geraint F. Lewis, Mike J. Irwin +4
The dynamics of Andromeda's dwarf galaxies and stellar streams
Michelle L. M. Collins, R. Michael Rich, Rodrigo A. Ibata +2
The PAndAS view of the Andromeda satellite system - II. Detailed properties of 23 M31 dwarf spheroidal galaxies
Nicolas F. Martin, Rodrigo A. Ibata, Geraint F. Lewis +15
Gravitational microlensing of quasar broad line regions at large optical depths
Geraint F. Lewis, Rodrigo A. Ibata
The Nature and Origin of Substructure in the Outskirts of M31 -- II. Detailed Star Formation Histories
Edouard J. Bernard, Annette M. N. Ferguson, Jenny C. Richardson +9
A kinematic study of the Andromeda dwarf spheroidal system
Michelle L. M. Collins, Scott C. Chapman, R. Michael Rich +12
Galactic halo stellar structures in the Triangulum-Andromeda region
Nicolas F. Martin, Rodrigo A. Ibata, Mike Irwin
The Canis Major Dwarf Galaxy
Geraint F. Lewis, Rodrigo A. Ibata, Michael J. Irwin +3
The Star Formation History and Dust Content in the Far Outer Disc of M31
Edouard J. Bernard, Annette M. N. Ferguson, Michael K. Barker +7
Searching for Variability in the Globular Cluster Messier 4
Robert D. Ferdman, Harvey B. Richer, James Brewer +11
NGC 147, NGC 185 and CassII: a genetic approach to orbital properties, star formation and tidal debris
Veronica Arias, Magda Guglielmo, Nuwanthika Fernando +9
The masses of Local Group dwarf spheroidal galaxies: The death of the universal mass profile
Michelle L. M. Collins, Scott C. Chapman, R. M. Rich +12
Testing Newtonian Gravity with AAOmega: Mass-To-Light Profiles and Metallicity Calibrations From 47 Tuc and M55
Richard R. Lane, László L. Kiss, Geraint F. Lewis +4
The Spatially-Resolved Star Formation History of the M31 Outer Disc
Edouard J. Bernard, Annette M. N. Ferguson, Scott C. Chapman +4
Resolving the mass--anisotropy degeneracy of the spherically symmetric Jeans equation I: theoretical foundation
Foivos I. Diakogiannis, Geraint F. Lewis, Rodrigo A. Ibata
A novel JEAnS analysis of the Fornax dwarf using evolutionary algorithms: mass follows light with signs of an off-centre merger
Foivos I. Diakogiannis, Geraint F. Lewis, Rodrigo A. Ibata +4
AAOmega Observations of 47 Tucanae: Evidence for a Past Merger?
Richard R. Lane, Brendon J. Brewer, László L. Kiss +6
The stellar halo and outer disk of M33
Alan W. McConnachie, Scott C. Chapman, Rodrigo A. Ibata +4
On the Origin of the Monoceros Ring - I: Kinematics, proper motions, and the nature of the progenitor
Magda Guglielmo, Richard R. Lane, Blair C. Conn +3
Searching for MACHOs in Galaxy Clusters
Geraint F. Lewis, Rodrigo A. Ibata, J. Stuart B. Wyithe
Measuring the Sun's Motion with Stellar Streams
Khyati Malhan, Rodrigo A. Ibata
Microlensing induced absorption line variability
Geraint F. Lewis, Rodrigo A. Ibata
Triangulum II: a very metal-poor and dynamically hot stellar system
Nicolas F. Martin, Rodrigo A. Ibata, Michelle L. M. Collins +7
Feeling the pull, a study of natural Galactic accelerometers. II: kinematics and mass of the delicate stellar stream of the Palomar 5 globular cluster
Rodrigo A. Ibata, Geraint F. Lewis, Guillaume Thomas +2
On the Stability of Satellite Planes I: Effects of Mass, Velocity, Halo Shape and Alignment
Nuwanthika Fernando, Veronica Arias, Magda Guglielmo +3
Faint, moving objects in the Hubble Deep Field: components of the dark halo?
Rodrigo A. Ibata, Harvey B. Richer, Ronald L. Gilliland +1
Stellar Streams as Probes of Dark Halo Mass and Morphology: A Bayesian Reconstruction
Anjali Varghese, Rodrigo A. Ibata, Geraint F. Lewis
Probing the Nature of the G1 Clump Stellar Overdensity in the Outskirts of M31
Daniel Faria, Rachel A. Johnson, Annette M. N. Ferguson +5
An investigation of gravitational lens determinations of H_o in quintessence cosmologies
Geraint F. Lewis, Rodrigo A. Ibata
Testing Newtonian Gravity with AAOmega: Mass-to-Light Profiles of Four Globular Clusters
Richard R. Lane, László L. Kiss, Geraint F. Lewis +4
A-type stars in the Canada-France Imaging Survey I. The stellar halo of the Milky Way traced to large radius by blue horizontal branch stars
Guillaume F. Thomas, Alan W. McConnachie, Rodrigo A. Ibata +14
Inferring the Andromeda Galaxy's mass from its giant southern stream with Bayesian simulation sampling
Mark A. Fardal, Martin D. Weinberg, Arif Babul +8
Archer of the Galactic disk? The effect on the outer HI disk of the Milky Way of collisional encounters with the Sagittarius dwarf galaxy
Rodrigo A. Ibata, Alexey O. Razoumov