527 citations · 1.2k across the 21 of their papers we have counts for
21 papers
Merger Driven or Internal Evolution? A New Morphological Study of Tidal Disruption Event Host Galaxies
Janet N. Y. Chang, Connor Bottrell, Lixin Dai +7
The host galaxies of tidal disruption events (TDEs) show enhanced central stellar concentration and are preferentially found in poststarburst and green valley populations. This con…
Galaxy Mergers in UNIONS -- II: Predicting Timescales in the Post-Merger Regime
Leonardo Ferreira, Sara L. Ellison, David R. Patton +3
Galaxy mergers are critical events that influence galaxy evolution by driving processes such as enhanced star formation, quenching, and active galactic nucleus (AGN) activity. Howe…
Interacting galaxies in the IllustrisTNG simulations - IX: Mini mergers trigger AGN in cosmological simulations
Shoshannah Byrne-Mamahit, Sara L. Ellison, David R. Patton +3
Galaxy mergers are transformative events that can cause gaseous inflows capable of triggering active galactic nuclei (AGN). Previous studies of AGN in simulations have mainly focus…
UNIONS: The Ultraviolet Near-Infrared Optical Northern Survey
Stephen Gwyn, Alan W. McConnachie, Jean-Charles Cuillandre +86
The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) is a "collaboration of collaborations" that is using the Canada-France-Hawai'i Telescope, the Pan-STARRS telescopes,…
Low redshift post-starburst galaxies host abundant HI reservoirs
Sara L. Ellison, Qifeng Huang, Dong Yang +8
Studying the gas content of post-starburst (PSB) galaxies can provide valuable clues regarding the process of fast quenching. Although previous works have studied the molecular gas…
Galaxy evolution in the post-merger regime I -- Most merger-induced in-situ stellar mass growth happens post-coalescence
Leonardo Ferreira, Sara L. Ellison, David R. Patton +5
Galaxy mergers can enhance star formation rates throughout the merger sequence, with this effect peaking around the time of coalescence. However, owing to a lack of information abo…
Galaxy evolution in the post-merger regime. II -- Post-merger quenching peaks within 500 Myr of coalescence
Sara L. Ellison, Leonardo Ferreira, Vivienne Wild +3
(Abridged) Mechanisms for quenching star formation in galaxies remain hotly debated, with galaxy mergers an oft-proposed pathway. In Ellison et al. (2022) we tested this scenario b…
The effect of image quality on galaxy merger identification with deep learning
Robert W. Bickley, Scott Wilkinson, Leonardo Ferreira +3
Studies have shown that the morphologies of galaxies are substantially transformed following coalescence after a merger, but post-mergers are notoriously difficult to identify, esp…
Galaxy Mergers in UNIONS -- I: A Simulation-driven Hybrid Deep Learning Ensemble for Pure Galaxy Merger Classification
Leonardo Ferreira, Robert W. Bickley, Sara L. Ellison +7
Merging and interactions can radically transform galaxies. However, identifying these events based solely on structure is challenging as the status of observed mergers is not easil…
Interacting galaxies in the IllustrisTNG simulations -- VII: The connection between the most luminous active galactic nuclei and galaxy interactions
Shoshannah Byrne-Mamahit, David R. Patton, Sara L. Ellison +5
We investigate the connection between the most luminous active galactic nuclei (AGN), galaxy pairs, and post-mergers in the IllustrisTNG simulation. We select galaxy pairs and post…
The limitations (and potential) of non-parametric morphology statistics for post-merger identification
Scott Wilkinson, Sara L. Ellison, Connor Bottrell +4
Non-parametric morphology statistics have been used for decades to classify galaxies into morphological types and identify mergers in an automated way. In this work, we assess how…
X-ray AGNs with SRG/eROSITA: Multi-wavelength observations reveal merger triggering and post-coalescence circumnuclear blowout
Robert W. Bickley, Sara L. Ellison, Mara Salvato +6
Major mergers between galaxies are predicted to fuel their central supermassive black holes (SMBHs), particularly after coalescence. However, determining the prevalence of active g…
AGN in post-mergers from the Ultraviolet Near Infrared Optical Northern Survey
Robert W. Bickley, Sara L. Ellison, David R. Patton +1
The kinematic disturbances associated with major galaxy mergers are known to produce gas inflows, which in turn may trigger accretion onto the supermassive black holes (SMBH) of th…
Galaxy mergers can rapidly shut down star formation
Sara L. Ellison, Scott Wilkinson, Joanna Woo +6
Galaxy mergers trigger both star formation and accretion onto the central supermassive black hole. As a result of subsequent energetic feedback processes, it has long been proposed…
The merger fraction of post-starburst galaxies in UNIONS
Scott Wilkinson, Sara L. Ellison, Connor Bottrell +4
Post-starburst (PSB) galaxies are defined as having experienced a recent burst of star formation, followed by a prompt truncation in further activity. Identifying the mechanism(s)…
Convolutional neural network identification of galaxy post-mergers in UNIONS using IllustrisTNG
Robert W. Bickley, Connor Bottrell, Maan H. Hani +6
The Canada-France Imaging Survey (CFIS) will consist of deep, high-resolution r-band imaging over ~5000 square degrees of the sky, representing a first-rate opportunity to identify…
Microlensing optical depth towards the Galactic bulge from MOA observations during 2000 with Difference Image Analysis
T. Sumi, F. Abe, I. A. Bond +27
We analyze the data of the gravitational microlensing survey carried out by by the MOA group during 2000 towards the Galactic Bulge (GB). Our observations are designed to detect ef…
Study of variable stars in the MOA data base: long-period red variables in the Large Magellanic Cloud
S. Noda, M. Takeuti, F. Abe +31
One hundred and forty six long-period red variable stars in the Large Magellanic Cloud (LMC) from the three year MOA project database were analysed. A careful periodic analysis was…
Improving the Prospects for Detecting Extrasolar Planets in Gravitational Microlensing in 2002
I. A. Bond, F. Abe, R. J. Dodd +19
Gravitational microlensing events of high magnification have been shown to be promising targets for detecting extrasolar planets. However, only a few events of high magnification h…
Study by MOA of extra-solar planets in gravitational microlensing events of high magnification
I. A. Bond, N. J. Rattenbury, J. Skuljan +27
A search for extra-solar planets was carried out in three gravitational microlensing events of high magnification, MACHO 98-BLG-35, MACHO 99-LMC-2, and OGLE 00-BUL-12. Photometry w…
Real-Time Difference Imaging Analysis of MOA Galactic Bulge Observations During 2000
I. A. Bond, F. Abe, R. J. Dodd +27
We describe observations carried out by the MOA group of the Galactic Bulge during 2000 that were designed to detect efficiently gravitational microlensing of faint stars in which…