229 citations · 1.5k across the 30 of their papers we have counts for
30 papers
The formation of cores in galaxies across cosmic time -- the existence of cores is not in tension with the LCDM paradigm
R. A. Jackson, S. Kaviraj, S. K. Yi +9
The `core-cusp' problem is considered a key challenge to the LCDM paradigm. Halos in dark matter only simulations exhibit `cuspy' profiles, where density continuously increases tow…
Emergence and cosmic evolution of the Kennicutt-Schmidt relation driven by interstellar turbulence
Katarina Kraljic, Florent Renaud, Yohan Dubois +12
The scaling relations between the gas content and star formation rate of galaxies provide useful insights into processes governing their formation and evolution. We investigate the…
Identification of tidal features in deep optical galaxy images with Convolutional Neural Networks
H. Domínguez Sánchez, G. Martin, I. Damjanov +14
Interactions between galaxies leave distinguishable imprints in the form of tidal features which hold important clues about their mass assembly. Unfortunately, these structures are…
Relaxed blue ellipticals: accretion-driven stellar growth is a key evolutionary channel for low mass elliptical galaxies
Ilin Lazar, Sugata Kaviraj, Garreth Martin +3
How elliptical galaxies form is a key question in observational cosmology. While the formation of massive ellipticals is strongly linked to mergers, the low mass (Mstar < 10^9.5 MS…
Evidence for non-merger co-evolution of galaxies and their supermassive black holes
R. J. Smethurst, R. S. Beckmann, B. D. Simmons +7
Recent observational and theoretical studies have suggested that supermassive black holes (SMBHs) grow mostly through non-merger (`secular') processes. Since galaxy mergers lead to…
Supermassive black holes in merger-free galaxies have higher spins which are preferentially aligned with their host galaxy
R. S. Beckmann, R. J. Smethurst, B. D. Simmons +7
Here we use the Horizon-AGN simulation to test whether the spins of SMBHs in merger-free galaxies are higher. We select samples using an observationally motivated bulge-to-total ma…
Preparing for low surface brightness science with the Vera C. Rubin Observatory: characterisation of tidal features from mock images
G. Martin, A. E. Bazkiaei, M. Spavone +50
Tidal features in the outskirts of galaxies yield unique information about their past interactions and are a key prediction of the hierarchical structure formation paradigm. The Ve…
Radio AGN in nearby dwarf galaxies: the important role of AGN in dwarf-galaxy evolution
F. Davis, S. Kaviraj, M. J. Hardcastle +8
We combine deep optical and radio data, from the Hyper Suprime-Cam and the Low-Frequency Array (LOFAR) respectively, to study 78 radio AGN in nearby (z<0.5) dwarf galaxies. Compari…
Extremely massive disc galaxies in the nearby Universe form through gas-rich minor mergers
R. A. Jackson, S. Kaviraj, G. Martin +5
In our hierarchical structure-formation paradigm, the observed morphological evolution of massive galaxies -- from rotationally-supported discs to dispersion-dominated spheroids --…
How the spectral energy distribution and galaxy morphology constrain each other, with application to morphological selection using galaxy colours
Emir Uzeirbegovic, Garreth Martin, Sugata Kaviraj
We introduce an empirical methodology to study how the spectral energy distribution (SED) and galaxy morphology constrain each other and implement this on 8000 galaxies from the HS…
Introducing the LBT Imaging of Galactic Halos and Tidal Structures (LIGHTS) survey. A preview of the low surface brightness Universe to be unveiled by LSST
Ignacio Trujillo, Mauro D'Onofrio, Dennis Zaritsky +10
We present the first results of the LBT Imaging of Galaxy Haloes and Tidal Structures (LIGHTS) survey. LIGHTS is an ongoing observational campaign with the 2x8.4m Large Binocular T…
The Star Formation Rates of Elliptical Galaxies from Core-Collapse Supernovae
Thomas M. Sedgwick, Ivan K. Baldry, Philip A. James +2
The level of star formation in elliptical galaxies is poorly constrained, due to difficulties in quantifying the contamination of flux-based estimates of star formation from unrela…
The NewHorizon Simulation -- To Bar Or Not To Bar
J. Reddish, K. Kraljic, M. S. Petersen +12
We use the NewHorizon simulation to study the redshift evolution of bar properties and fractions within galaxies in the stellar masses range $M_{\star} = 10^{7.25} - 10^{11.4} \ \r…
Dark-matter-deficient dwarf galaxies form via tidal stripping of dark matter in interactions with massive companions
R. A. Jackson, S. Kaviraj, G. Martin +11
In the standard Lambda-CDM paradigm, dwarf galaxies are expected to be dark-matter-rich, as baryonic feedback is thought to quickly drive gas out of their shallow potential wells a…
Introducing the NewHorizon simulation: Galaxy properties with resolved internal dynamics across cosmic time
Yohan Dubois, Ricarda Beckmann, Frédéric Bournaud +13
Hydrodynamical cosmological simulations are increasing their level of realism by considering more physical processes and having greater resolution or larger statistics. However, us…
Formation of compact galaxies in the Extreme-Horizon simulation
Solène Chabanier, Frédéric Bournaud, Yohan Dubois +18
We present the Extreme-Horizon (EH) cosmological simulation: EH models galaxy formation with stellar and AGN feedback and uses a very high resolution in the intergalactic and circu…
The role of mergers and interactions in driving the evolution of dwarf galaxies over cosmic time
G. Martin, R. A. Jackson, S. Kaviraj +9
Dwarf galaxies (M*<10^9 Msun) are key drivers of mass assembly in high mass galaxies, but relatively little is understood about the assembly of dwarf galaxies themselves. Using the…
The origin of low-surface-brightness galaxies in the dwarf regime
R. A. Jackson, G. Martin, S. Kaviraj +15
Low-surface-brightness galaxies (LSBGs) -- defined as systems that are fainter than the surface-brightness limits of past wide-area surveys -- form the overwhelming majority of gal…
Black hole mergers from dwarf to massive galaxies with the NewHorizon and Horizon-AGN simulations
Marta Volonteri, Hugo Pfister, Ricarda S. Beckman +12
Massive black hole (MBH) coalescences are powerful sources of low-frequency gravitational waves. To study these events in the cosmological context we need to trace the large-scale…
Why do extremely massive disc galaxies exist today?
Ryan A. Jackson, Garreth Martin, Sugata Kaviraj +4
Galaxy merger histories correlate strongly with stellar mass, largely regardless of morphology. Thus, at fixed stellar mass, spheroids and discs share similar assembly histories, b…
When galaxies align: intrinsic alignments of the progenitors of elliptical galaxies in the Horizon-AGN simulation
James Bate, Nora Elisa Chisari, Sandrine Codis +5
Elliptical galaxies today appear aligned with the large-scale structure of the Universe, but it is still an open question when they acquire this alignment. Observational data is cu…
Galaxy morphological classification in deep-wide surveys via unsupervised machine learning
Garreth Martin, Sugata Kaviraj, Alex Hocking +2
Galaxy morphology is a fundamental quantity, that is essential not only for the full spectrum of galaxy-evolution studies, but also for a plethora of science in observational cosmo…
Massive spheroids can form in single minor mergers
R. A. Jackson, G. Martin, S. Kaviraj +4
Understanding how rotationally-supported discs transform into dispersion-dominated spheroids is central to our comprehension of galaxy evolution. Morphological transformation is la…
AGN in dwarf galaxies: frequency, triggering processes and the plausibility of AGN feedback
Sugata Kaviraj, Garreth Martin, Joseph Silk
While AGN are considered to be key drivers of the evolution of massive galaxies, their potentially significant role in the dwarf-galaxy regime (M*< 10^9 MSun) remains largely unexp…