17 citations · 75 across the 18 of their papers we have counts for
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Diffuse Dwarf Galaxies in Galaxy Clusters: I. Stellar Populations and Radial Gradients
Arsen Levitskiy, Duncan A. Forbes, Jonah S. Gannon +5
We use Keck/KCWI spectroscopy to study one ultra-diffuse galaxy (UDG) and five Nearly-UDGs (NUDGEs) in the Perseus cluster, together with an additional UDG in the Coma cluster. As…
New Measurements of Distances to Galaxies in the NGC 1052 Field with the Hubble and James Webb Space Telescopes: Testing the Bullet-Dwarf Origin of the Trail
Yimeng Tang, Gagandeep S. Anand, Aaron J. Romanowsky +2
NGC 1052-DF2 and DF4 are two ultra-diffuse galaxies deficient in dark matter (DM), and reported as part of a remarkable linear trail of dwarf galaxies in the NGC 1052 field. Recent…
Dark matter-deficient twins: FCC 224 and FCC 240 as possible analogues of NGC 1052-DF2 and DF4
Maria Luisa Buzzo, Pieter van Dokkum, Michael Hilker +3
The recent "bullet-dwarf" model proposes that high-velocity collisions between dwarf galaxies can produce stellar systems with overluminous globular clusters (GCs) and a deficiency…
Revisiting the distance and the globular cluster system of the remarkable galaxy UDG1 in the NGC 5846 group
Duncan A. Forbes, Bas van Heumen, Yimeng Tang
Two studies that utilised the same HST/WFC3 imaging of NGC5846_UDG1 have reported quite different total counts for its globular cluster (GC) system, i.e. 54 9 vs 33 3 G…
Connection Between Dwarf Galaxies and Globular Clusters: Insights from the Perseus Cluster Using Subaru Imaging and Keck Spectroscopy
Yimeng Tang, Aaron J. Romanowsky, Song Huang +11
We present a systematic study of 189 dwarf galaxies and their globular cluster (GC) systems in the Perseus cluster, based on deep Subaru Hyper Suprime-Cam imaging and Keck spectros…
A Pearl in the Shell: an ultra-compact dwarf within the tidal debris surrounding spiral galaxy NGC 7531
David Martínez-Delgado, Aaron J. Romanowsky, Yimeng Tang +7
Stellar substructures within tidal debris preserve information about their progenitor galaxies' properties, offering insights into hierarchical mass assembly. We examine a compact…
Morphology and stellar populations of a candidate ultra-diffuse galaxy in early Euclid and Rubin imaging
Aaron J. Romanowsky, Yimeng Tang, Kevin A. Bundy
We present multi-wavelength imaging and analysis of a low surface brightness (LSB) dwarf galaxy in the Extended Chandra Deep Field South (ECDFS), SMDG0333094-280938, with particula…
Kinematic Confirmation of a Remarkable Linear Trail of Galaxies in the NGC 1052 Field, Consistent with Formation in a High-Speed Bullet Dwarf Collision
Michael A. Keim, Pieter van Dokkum, Zili Shen +6
A unique linear trail of diffuse galaxies was recently identified in the NGC 1052 field. This trail includes the remarkable, ultra-diffuse galaxies DF2 and DF4 which lack dark matt…
A negative stellar massgaseous metallicity gradient relation of dwarf galaxies modulated by stellar feedback
Tie Li, Hong-Xin Zhang, Wenhe Lyu +16
Baryonic cycling is reflected in the spatial distribution of metallicity within galaxies, yet gas-phase metallicity distribution and its connection with other properties of dwarf g…
A new class of dark matter-free dwarf galaxies? I. Clues from FCC 224, NGC 1052-DF2 and NGC 1052-DF4
Maria Luisa Buzzo, Duncan A. Forbes, Aaron J. Romanowsky +8
The discovery of quiescent, dark matter (DM)-deficient ultra-diffuse galaxies (UDGs) with overluminous globular clusters (GCs) has challenged galaxy formation models within the Lam…
An Unexplained Origin for the Unusual Globular Cluster System in the Ultra-diffuse Galaxy FCC 224
Yimeng Tang, Aaron J. Romanowsky, Jonah S. Gannon +9
We study the quiescent ultra-diffuse galaxy FCC 224 in the Fornax cluster using Hubble Space Telescope (HST) imaging, motivated by peculiar properties of its globular cluster (GC)…
Galaxy mass dependence of metal-enrichment of nuclear star clusters
Wenhe Lyu, Hong-Xin Zhang, Sanjaya Paudel +5
Nuclear Star Clusters (NSCs) are commonly found in galaxy centers, but their dominant formation mechanisms remain elusive. We perform a consistent analysis of stellar populations o…
Testing the Bullet Dwarf Collision Scenario in the NGC 1052 Group Through Morphologies and Stellar Populations
Yimeng Tang, Aaron J. Romanowsky, Pieter G. van Dokkum +8
NGC 1052-DF2 and -DF4 are two ultra-diffuse galaxies that have been reported as deficient in dark matter and associated with the same galaxy group. Recent findings suggest that DF2…
Low-density star cluster formation: discovery of a young faint fuzzy on the outskirts of the low-mass spiral galaxy NGC 247
Aaron J. Romanowsky, Søren S. Larsen, Alexa Villaume +21
The classical globular clusters found in all galaxy types have half-light radii of 2-4 pc, which have been tied to formation in the dense cores of giant molecular…
Unveiling the formation of NGC 2915 with MUSE: A counter-rotating stellar disk embedded in a disordered gaseous environment
Yimeng Tang, Bojun Tao, Hong-Xin Zhang +6
NGC 2915 is a unique nearby galaxy that is classified as an isolated blue compact dwarf based on its optical appearance but has an extremely extended H i gas disk with prominent Sd…
Discovery of a Bimodal Environmental Distribution of Compact Ellipticals in the Local Universe
Guangwen Chen, Hong-Xin Zhang, Xu Kong +5
Low-mass compact stellar systems (CSSs; 10 M) are thought to be a mixed bag of objects with various formation mechanisms. Previous surveys of CSSs…
Sub-galactic scaling relations with T-based metallicity of low metallicity regions in galaxies: metal-poor gas inflow may have important effects?
Yao Yao, Haiyang Liu, Xu Kong +7
The scaling relationship is a fundamental probe of the evolution of galaxies. Using the integral field spectroscopic data from the Mapping Nearby Galaxies at Apache Point Observato…
Physical Drivers of Emission Line Diversity of SDSS Seyfert 2s and LINERs After Removal of Contributions by Star Formation
Christopher J. Agostino, Samir Salim, S. M. Faber +6
Ionization sources other than HII regions give rise to the right-hand branch in the standard ([NII]) BPT diagram, populated by Seyfert 2s and LINERs. However, because the majority…
New Constraints on the Origin of Surface Brightness Profile Breaks of Disk Galaxies from MaNGA
Yimeng Tang, Qianhui Chen, Hong-Xin Zhang +6
In an effort to probe the origin of surface brightness profile (SBP) breaks widely observed in nearby disk galaxies, we carry out a comparative study of stellar population profiles…