151 citations · 1.2k across the 37 of their papers we have counts for
38 papers
The Delegate Survey: KOALA/AAOmega-IFU spectroscopy of three nearby dwarf galaxies
Kyungdo Ko, Helmut Jerjen, Sarah M. Sweet +6
Assessing the cosmological typicality of the Local Group is crucial for establishing whether its dwarf galaxy population is representative. To this end, the Delegate Survey targets…
Tracing neutral hydrogen in UGCA 320: A MHONGOOSE perspective on an edge-on dwarf galaxy in a group environment
Nikki Zabel, D. J. Pisano, Sushma Kurapati +8
We present a detailed analysis of the neutral atomic gas (HI) in the dwarf galaxy UGCA 320, observed with the MeerKAT telescope as part of the MHONGOOSE (MeerKAT HI Observations of…
Stars and ionized gas in UGCA 320: a nearby gas-rich, dwarf Irregular galaxy
Adebusola B. Alabi, S. Ilani Loubser, Moses K. Mogotsi +1
UGCA 320 is a gas-rich dwarf irregular galaxy which belongs to a nearby, relatively isolated group of dwarf galaxies. Here, we combine multi-band HST imaging data with deep long-sl…
An independent estimate of H(z) at z = 0.5 from the stellar ages of brightest cluster galaxies
S. Ilani Loubser, Adebusola B. Alabi, Matt Hilton +6
Several cosmological observations (e.g., Cosmic Microwave Background (CMB), Supernovae Type Ia, and local distance ladder measurements such as Cepheids) have been used to measure t…
Morpheus Reveals Distant Disk Galaxy Morphologies with JWST: The First AI/ML Analysis of JWST Images
Brant E. Robertson, Sandro Tacchella, Benjamin D. Johnson +21
The dramatic first images with James Webb Space Telescope (JWST) demonstrated its power to provide unprecedented spatial detail for galaxies in the high-redshift universe. Here, we…
Low-mass compact elliptical galaxies: spatially-resolved stellar populations and kinematics with the Keck Cosmic Web Imager
Anna Ferre-Mateu, Mark Durre, Duncan A. Forbes +4
We present spatially-resolved two-dimensional maps and radial trends of the stellar populations and kinematics for a sample of six compact elliptical galaxies (cE) using spectrosco…
A Photometric and Kinematic Analysis of UDG1137+16 (dw1137+16): Probing Ultra-Diffuse Galaxy Formation in a Group Environment
Jonah S. Gannon, Bililign T. Dullo, Duncan A. Forbes +6
The dominant physical formation mechanism(s) for ultra-diffuse galaxies (UDGs) is still poorly understood. Here, we combine new, deep imaging from the Jeanne Rich Telescope with de…
Stellar Velocity Dispersion and Dynamical Mass of the Ultra-Diffuse Galaxy NGC 5846_UDG1 from the Keck Cosmic Web Imager
Duncan A. Forbes, Jonah S. Gannon, Aaron J. Romanowsky +4
The ultra-diffuse galaxy in the NGC 5846 group (NGC 5846_UDG1) was shown to have a large number of globular cluster (GC) candidates from deep imaging as part of the VEGAS survey. R…
NGC 474 as viewed with KCWI: diagnosing a shell galaxy
Adebusola B. Alabi, Anna Ferré-Mateu, Duncan A. Forbes +2
We present new spectra obtained using Keck/KCWI and perform kinematics and stellar population analyses of the shell galaxy NGC 474, from both the galaxy centre and a region from th…
An expanded catalogue of low surface brightness galaxies in the Coma cluster using Subaru/Suprime-Cam
Adebusola B. Alabi, Aaron J. Romanowsky, Duncan A. Forbes +2
We present a catalogue of low surface brightness (LSB) galaxies in the Coma cluster obtained from deep Subaru/Suprime-Cam V and R-band imaging data within a region of 4 deg$^…
Globular Clusters in Coma Cluster Ultra Diffuse Galaxies (UDGs): Evidence for Two Types of UDG?
Duncan A. Forbes, Adebusola Alabi, Aaron J. Romanowsky +2
Ultra diffuse galaxies (UDGs) reveal extreme properties. Here we compile the largest study to date of 85 globular cluster (GC) systems around UDGs in the Coma cluster, using new de…
Globular clusters in the stellar stream surrounding the Milky Way analog NGC 5907
Adebusola B. Alabi, Duncan A. Forbes, Aaron J. Romanowsky +1
We study the globular clusters (GCs) in the spiral galaxy NGC~5907 well-known for its spectacular stellar stream -- to better understand its origin. Using wide-field Subaru/Suprime…
Dark matter and no dark matter: On the halo mass of NGC 1052
Duncan A. Forbes, Adebusola Alabi, Jean P. Brodie +1
The NGC 1052 group, and in particular the discovery of two ultra diffuse galaxies with very low internal velocity dispersions, has been the subject of much attention recently. Here…
FOBOS: A Next-Generation Spectroscopic Facility at the W. M. Keck Observatory
K. Bundy, K. Westfall, N. MacDonald +38
High-multiplex and deep spectroscopic follow-up of upcoming panoramic deep-imaging surveys like LSST, Euclid, and WFIRST is a widely recognized and increasingly urgent necessity. N…
Extreme chemical abundance ratio suggesting an exotic origin for an ultra-diffuse galaxy
Ignacio Martin-Navarro, Aaron J. Romanowsky, Jean P. Brodie +7
Ultra diffuse galaxies are a population of extended galaxies but with relatively low luminosities. The origin of these objects remains unclear, largely due to the observational cha…
Revisiting the X-ray - Mass scaling relations of Early-type Galaxies with the Mass of their Globular Cluster Systems as a Proxy for the Total Galaxy Mass
Dong-Woo Kim, Nicholas James, Giuseppina Fabbiano +2
Using globular cluster (GC) kinematics and photometry data, we calibrate the scaling relation between the total galaxy mass (M_TOT including dark matter) and total globular cluster…
The WAGGS project - II. The reliability of the calcium triplet as a metallicity indicator in integrated stellar light
Christopher Usher, Thomas Beckwith, Sabine Bellstedt +12
Using data from the WiFeS Atlas of Galactic Globular cluster Spectra we study the behaviour of the calcium triplet (CaT), a popular metallicity indicator in extragalactic stellar p…
Chromodynamical Analysis of Lenticular Galaxies using Globular Clusters and Planetary Nebulae
Emilio J. B. Zanatta, Arianna Cortesi, Ana L. Chies-Santos +7
Recovering the origins of lenticular galaxies can shed light on the understanding of galaxy formation and evolution, since they present properties that can be found in both ellipti…
The SLUGGS Survey: A comparison of total-mass profiles of early-type galaxies from observations and cosmological simulations, to 4 effective radii
Sabine Bellstedt, Duncan A. Forbes, Aaron J. Romanowsky +11
We apply the Jeans Anisotropic MGE (JAM) dynamical modelling method to SAGES Legacy Unifying Globulars and GalaxieS (SLUGGS) survey data of early-type galaxies in the stellar mass…
Origins of ultra-diffuse galaxies in the Coma cluster - I. Constraints from velocity phase-space
Adebusola Alabi, Anna Ferré-Mateu, Aaron J. Romanowsky +8
We use Keck/DEIMOS spectroscopy to confirm the cluster membership of 16 ultra-diffuse galaxies (UDGs) in the Coma cluster, bringing the total number of spectroscopically con- firme…
The fraction of dark matter within galaxies from the IllustrisTNG simulations
Mark R. Lovell, Annalisa Pillepich, Shy Genel +9
We use the IllustrisTNG (TNG) cosmological simulations to provide theoretical expectations for the dark matter mass fractions (DMFs) and circular velocity profiles of galaxies. TNG…
Origins of ultra-diffuse galaxies in the Coma cluster II. Constraints from their stellar populations
Anna Ferre-Mateu, Adebusola Alabi, Duncan A. Forbes +8
In this second paper of the series, we study with new Keck/DEIMOS spectra the stellar populations of seven spectroscopically confirmed ultra-diffuse galaxies (UDGs) in the Coma clu…
The SLUGGS Survey: The Inner Dark Matter Density Slope of the Massive Elliptical Galaxy NGC 1407
Asher Wasserman, Aaron J. Romanowsky, Jean Brodie +7
We investigate the dark matter density profile of the massive elliptical galaxy, NGC 1407, by constructing spherically symmetric Jeans models of its field star and globular cluster…
The baryonic halos of isolated elliptical galaxies
Ricardo Salinas, Adebusola Alabi, Nicklas Hammar +3
Without the interference of a number of events, galaxies may suffer in crowded environments (e.g., stripping, harassment, strangulation); isolated elliptical galaxies provide a con…