Sarah Brough
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View article: The dependence of the intracluster light fraction on galaxy cluster properties
The dependence of the intracluster light fraction on galaxy cluster properties Open
We use machine learning to measure the intracluster light (ICL) fractions of 177 galaxy groups and clusters identified from Hyper Suprime-Cam Subaru Strategic Program imaging to explore how the ICL varies with the properties of its host cl…
View article: Investigating the imprints of tidal features on simulated galaxy outskirts in LSST-like mock observations
Investigating the imprints of tidal features on simulated galaxy outskirts in LSST-like mock observations Open
Tidal features provide signatures of recent galaxy mergers, offering insights into the role of mergers in galaxy evolution. The Vera C. Rubin Observatory’s upcoming Legacy Survey of Space and Time (LSST) will allow for an unprecedented stu…
View article: The intragroup light in KiDS+GAMA groups
The intragroup light in KiDS+GAMA groups Open
The assembly of galaxy groups and clusters occur through dynamical interactions of smaller systems, resulting in the formation of a diffuse stellar halo known as the intragroup or intracluster light (IGL or ICL). By preserving the records …
View article: Tidal features around simulated groups and cluster galaxies: enhancement and suppression of merger events through environment in LSST-like mock observations
Tidal features around simulated groups and cluster galaxies: enhancement and suppression of merger events through environment in LSST-like mock observations Open
Generally, merger likelihood increases in denser environments; however, the large relative velocities at the centres of dense clusters are expected to reduce the likelihood of mergers for satellite galaxies. Tidal features probe the recent…
View article: Analysing the prevalence of tidal features in HSC-SSP using self-supervised representation learning
Analysing the prevalence of tidal features in HSC-SSP using self-supervised representation learning Open
We use a combination of self-supervised machine learning and visual classification to identify tidal features in a sample of 34 331 galaxies with stellar masses $\log _{10}(M_{\star }/\rm {M}_{\odot })\ge 9.5$ and redshift $z\le 0.4$, draw…
Analysing the prevalence of tidal features in HSC-SSP using self-supervised representation learning Open
We use a combination of self-supervised machine learning and visual classification to identify tidal features in a sample of 34,331 galaxies with stellar masses $\log_{10}(M_{*}/\rm{M}_{\odot})\geq9.5$ and redshift $z\leq0.4$, drawn from t…
View article: Cluster passage driving galaxy kinematic and structural evolution in the SAMI Galaxy Survey
Cluster passage driving galaxy kinematic and structural evolution in the SAMI Galaxy Survey Open
The cluster environment can have a significant impact on galaxy evolution. We study the impact that passage through a cluster has on stellar and ionised gas kinematics for galaxies within the Sydney-AAO Multi Integral field (SAMI) Galaxy S…
View article: Cluster passage driving galaxy kinematic and structural evolution in the SAMI Galaxy Survey
Cluster passage driving galaxy kinematic and structural evolution in the SAMI Galaxy Survey Open
The cluster environment can have a significant impact on galaxy evolution. We study the impact that passage through a cluster has on stellar and ionised gas kinematics for galaxies within the Sydney-AAO Multi Integral field (SAMI) Galaxy S…
View article: Intra-cluster light as a dynamical clock for galaxy clusters: Insights from the MAGNETICUM, IllustrisTNG, Hydrangea, and Horizon-AGN simulations
Intra-cluster light as a dynamical clock for galaxy clusters: Insights from the MAGNETICUM, IllustrisTNG, Hydrangea, and Horizon-AGN simulations Open
Context. As the most massive nodes of the cosmic web, galaxy clusters represent the best probes of structure formation. Over time, they grow by accreting and disrupting satellite galaxies, adding those stars to the brightest cluster galaxy…
View article: Intracluster light is a biased tracer of the dark matter distribution in clusters
Intracluster light is a biased tracer of the dark matter distribution in clusters Open
The diffuse stellar component of galaxy clusters known as intracluster light (ICL) has been proposed as an observable tracer of the cluster’s dark matter (DM) halo. Assessing its reliability as a DM tracer requires understanding how the in…
View article: The SAMI Galaxy Survey: large-scale environment affects galaxy spin amplitudes and the formation of slow rotators
The SAMI Galaxy Survey: large-scale environment affects galaxy spin amplitudes and the formation of slow rotators Open
We explore the impact of the large-scale 3D density field, as defined by deep, wide-field galaxy surveys, on stellar spin ($\lambda _{\rm R_e}$) and the distributions of fast and slow rotators. We use the Galaxy And Mass Assembly spectrosc…
View article: The SAMI Galaxy Survey: large-scale environment affects galaxy spin amplitudes and the formation of slow rotators
The SAMI Galaxy Survey: large-scale environment affects galaxy spin amplitudes and the formation of slow rotators Open
We explore the impact of the large-scale 3D density field, as defined by deep, wide-field galaxy surveys, on stellar spin ($λ_{\rm R_e}$) and the distributions of fast and slow rotators. We use the GAMA spectroscopic redshift survey to rec…
View article: The MAGPI Survey: radial trends in star formation across different cosmological simulations in comparison with observations at <i>z</i> ~ 0.3
The MAGPI Survey: radial trends in star formation across different cosmological simulations in comparison with observations at <i>z</i> ~ 0.3 Open
We investigate the internal and external mechanisms that regulate and quench star formation (SF) in galaxies at $z \sim 0.3$ using MAGPI observations and the eagle, magneticum, and illustrisTNG cosmological simulations. Using simspin to ge…
View article: Measuring the Intracluster Light Fraction with Machine Learning
Measuring the Intracluster Light Fraction with Machine Learning Open
The intracluster light (ICL) is an important tracer of a galaxy cluster’s history and past interactions. However, only small samples have been studied to date due to its very low surface brightness and the heavy manual involvement required…
View article: Morphological classification of galaxies through structural and star formation parameters using machine learning
Morphological classification of galaxies through structural and star formation parameters using machine learning Open
We employ the eXtreme Gradient Boosting (XGBoost) machine learning (ML) method for the morphological classification of galaxies into two (early-type, late-type) and five (E, S0–S0a, Sa–Sb, Sbc–Scd, Sd–Irr) classes, using a combination of n…
View article: The MAGPI Survey: the subtle role of environment and not-so-subtle impact of generations of stars on galaxy dynamics
The MAGPI Survey: the subtle role of environment and not-so-subtle impact of generations of stars on galaxy dynamics Open
The stellar age and mass of galaxies have been suggested as the primary determinants for the dynamical state of galaxies, with environment seemingly playing no or only a very minor role. We use a sample of 77 galaxies at intermediate redsh…
View article: Measuring the intracluster light fraction with machine learning
Measuring the intracluster light fraction with machine learning Open
The intracluster light (ICL) is an important tracer of a galaxy cluster's history and past interactions. However, only small samples have been studied to date due to its very low surface brightness and the heavy manual involvement required…
View article: The MAGPI Survey: The kinematic morphology–density relation (or lack thereof) and the Hubble sequence at z ∼ 0.3
The MAGPI Survey: The kinematic morphology–density relation (or lack thereof) and the Hubble sequence at z ∼ 0.3 Open
This work presents visual morphological and dynamical classifications for 637 spatially resolved galaxies, most of which are at intermediate redshift ( $z\sim0.3$ ), in the Middle-Ages Galaxy Properties with Integral field spectroscopy (MA…
View article: The MAGPI Survey: The subtle role of environment and not-so-subtle impact of generations of stars on galaxy dynamics
The MAGPI Survey: The subtle role of environment and not-so-subtle impact of generations of stars on galaxy dynamics Open
The stellar age and mass of galaxies have been suggested as the primary determinants for the dynamical state of galaxies, with environment seemingly playing no or only a very minor role. We use a sample of 77 galaxies at intermediate redsh…
View article: The MAGPI Survey: radial trends in star formation across different cosmological simulations in comparison with observations at $z \sim$ 0.3
The MAGPI Survey: radial trends in star formation across different cosmological simulations in comparison with observations at $z \sim$ 0.3 Open
We investigate the internal and external mechanisms that regulate and quench star formation (SF) in galaxies at $z \sim 0.3$ using MAGPI observations and the EAGLE, Magneticum, and IllustrisTNG cosmological simulations. Using SimSpin to ge…
View article: RMS asymmetry: a robust metric of galaxy shapes in images with varied depth and resolution
RMS asymmetry: a robust metric of galaxy shapes in images with varied depth and resolution Open
Structural disturbances, such as galaxy mergers or instabilities, are key candidates for driving galaxy evolution, so it is important to detect and quantify galaxies hosting these disturbances spanning a range of masses, environments, and …
View article: The SAMI galaxy survey: on the importance of applying multiple selection criteria for finding Milky Way analogues
The SAMI galaxy survey: on the importance of applying multiple selection criteria for finding Milky Way analogues Open
Milky Way analogues (MWAs) provide an alternative insight into the various pathways that lead to the formation of disc galaxies with similar properties to the Milky Way (MW). In this study, we explore different selection techniques for ide…
View article: The SAMI Galaxy Survey: On the importance of applying multiple selection criteria for finding Milky Way Analogues
The SAMI Galaxy Survey: On the importance of applying multiple selection criteria for finding Milky Way Analogues Open
Milky Way Analogues (MWAs) provide an alternative insight into the various pathways that lead to the formation of disk galaxies with similar properties to the Milky Way. In this study, we explore different selection techniques for identify…
View article: Erratum: the SAMI Galaxy Survey: can we trust aperture corrections to predict star formation?
Erratum: the SAMI Galaxy Survey: can we trust aperture corrections to predict star formation? Open
The paper ‘The SAMI Galaxy Survey: can we trust aperture corrections to predict star formation?’ was published in MNRAS 455, 2826 (2016). A mischaracterization of the data presented in Figs 10 & 11 of the original paper affects our conclus…
View article: Bright star subtraction pipeline for LSST: phase one report
Bright star subtraction pipeline for LSST: phase one report Open
We present the phase one report of the Bright Star Subtraction (BSS) pipeline\nfor the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST).\nThis pipeline is designed to create an extended PSF model by utilizing observed\nst…
View article: Detecting galaxy tidal features using self-supervised representation learning
Detecting galaxy tidal features using self-supervised representation learning Open
Low surface brightness substructures around galaxies, known as tidal features, are a valuable tool in the detection of past or ongoing galaxy mergers, and their properties can answer questions about the progenitor galaxies involved in the …
View article: Characterizing tidal features around galaxies in cosmological simulations
Characterizing tidal features around galaxies in cosmological simulations Open
Tidal features provide signatures of recent mergers and offer a unique insight into the assembly history of galaxies. The Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) will enable an unprecedentedly large survey of tid…
View article: Characterising Tidal Features Around Galaxies in Cosmological Simulations
Characterising Tidal Features Around Galaxies in Cosmological Simulations Open
Tidal features provide signatures of recent mergers and offer a unique insight into the assembly history of galaxies. The Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) will enable an unprecedentedly large survey of tid…
View article: RMS asymmetry: a robust metric of galaxy shapes in images with varied depth and resolution
RMS asymmetry: a robust metric of galaxy shapes in images with varied depth and resolution Open
Structural disturbances, such as galaxy mergers or instabilities, are key candidates for driving galaxy evolution, so it is important to detect and quantify galaxies hosting these disturbances spanning a range of masses, environments, and …
View article: Bright Star Subtraction Pipeline for LSST: Progress Review
Bright Star Subtraction Pipeline for LSST: Progress Review Open
We present the Bright Star Subtraction (BSS) pipeline for the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST). This pipeline generates an extended PSF model using observed stars and subtracts the model from the bright st…