681 citations · 3.3k across the 59 of their papers we have counts for
57 papers · 1 filter
Galaxy-SMBH co-evolution in 2,435 DESI disk galaxies and merger-free BH growth in bulgeless disks
Sophie M. Jewell, Rebecca J. Smethurst, Chris J. Lintott +8
We analyse black hole scaling relations for disk-dominated galaxies, and present evidence for secularly driven galaxy-black hole co-evolution. We do this observationally by looking…
Massive black holes and their galaxies
Ricarda S. Beckmann, Rebecca J. Smethurst
Almost every galaxy in the local Universe is observed to have a massive black hole in the centre. The properties of these black holes are observed to tightly correlate with those o…
Galaxy Zoo Bar Lengths: A Catalogue of Measurements from Hubble Space Telescope Images and the Evolution of Galactic Bar Structure at z < 1
Tenley Hutchinson-Smith, Brooke D. Simmons, Karen L. Masters +12
Understanding the role of galactic scale bars in disk galaxy evolution requires detailed measurements of bar properties across galaxies hosting bars at many redshifts. We present m…
Introducing : a new universal kinematic disturbance parameter
Jonah M. Powley, Rebecca J. Smethurst, Chris J. Lintott +1
We introduce a new kinematic disturbance parameter, (pronounced `DVSG'), which takes advantage of integral field spectroscopy (IFS) to quantify differences between a…
The Role of Baryonic and Dark Matter in Bar Kinematics
Tobias Géron, Kai Zhu, Steph Campbell +3
Simulations predict that bars in galaxies should slow down over time. This is often attributed to the exchange of angular momentum between the bar and other regions of the galaxy,…
The complex relationships between AGN, bars and bulges
Izzy L. Garland, Henry Best, Lucy F. Fortson +9
Context. Via scaling relations, it is well-known that active galactic nuclei (AGN) and bulges are linked. This link was thought to be driven by mergers, but recent studies show tha…
The effects of bar strength and kinematics on galaxy evolution II: The global and local impacts of slow-strong bars
Petra Mengistu, Karen L. Masters, Tobias Geron +3
There is now clear evidence, from a variety of studies, that galactic bars contribute to and/or accelerate processes which quench galaxies. However, bars have a variety of strength…
Here Be SDRAGNs - Spiral Galaxies Hosting Large Double Radio Sources
Jean Tate, William C. Keel, Michael O'Keeffe +16
We present a sample of large double radio sources hosted by spiral galaxies (Spiral Double Radio Active Galactic Nuclei, SDRAGNs). Candidates were selected during Radio Galaxy Zoo,…
Spatio-Spectroscopic Representation Learning using Unsupervised Convolutional Long-Short Term Memory Networks
Kameswara Bharadwaj Mantha, Lucy Fortson, Ramanakumar Sankar +8
Integral Field Spectroscopy (IFS) surveys offer a unique new landscape in which to learn in both spatial and spectroscopic dimensions and could help uncover previously unknown insi…
Strong Bars, Strong Inflow: The Effect of Bar Strength on Gas Inflow
Maelle Magnan, Tobias Geron, Izzy L. Garland +5
Stellar bars are elongated structures in disk galaxies that can torque and funnel gas inward, influencing galaxy evolution. While strong bars are known to induce rapid inflow, the…
Bars in low-density environments rotate faster than bars in dense regions
Natalia Puczek, Tobias Géron, Rebecca J. Smethurst +1
Does the environment of a galaxy directly influence the kinematics of its bar? We present observational evidence that bars in high-density environments exhibit significantly slower…
Galaxy Zoo: Cosmic Dawn -- morphological classifications for over 41,000 galaxies in the Euclid Deep Field North from the Hawaii Two-0 Cosmic Dawn survey
James Pearson, Hugh Dickinson, Stephen Serjeant +22
We present morphological classifications of over 41,000 galaxies out to across six square degrees of the Euclid Deep Field North (EDFN) from the Hawaii Twenty…
Galaxy Zoo CEERS: Bar fractions up to z~4.0
Tobias Géron, R. J. Smethurst, Hugh Dickinson +22
We study the evolution of the bar fraction in disc galaxies between using multi-band coloured images from JWST CEERS. These images were classified by citizen scient…
Structural Decomposition of Merger-Free Galaxies Hosting Luminous AGNs
Matthew J. Fahey, Izzy. L. Garland, Brooke. D. Simmons +10
Active galactic nucleus (AGN) growth in disk-dominated, merger-free galaxies is poorly understood, largely due to the difficulty in disentangling the AGN emission from that of the…
Galaxy Zoo DESI: large-scale bars as a secular mechanism for triggering AGN
Izzy L. Garland, Mike Walmsley, Maddie S. Silcock +13
Despite the evidence that supermassive black holes (SMBHs) co-evolve with their host galaxy, and that most of the growth of these SMBHs occurs via merger-free processes, the underl…
The effects of bar strength and kinematics on galaxy evolution: slow strong bars affect their hosts the most
Tobias Géron, R. J. Smethurst, Chris Lintott +5
We study how bar strength and bar kinematics affect star formation in different regions of the bar by creating radial profiles of EW[H] and D4000 using data from SDSS-…
The most luminous, merger-free AGN show only marginal correlation with bar presence
Izzy L. Garland, Matthew J. Fahey, Brooke D. Simmons +13
The role of large-scale bars in the fuelling of active galactic nuclei (AGN) is still debated, even as evidence mounts that black hole growth in the absence of galaxy mergers cumul…
Harnessing the Hubble Space Telescope Archives: A Catalogue of 21,926 Interacting Galaxies
David O'Ryan, Bruno Merín, Brooke D. Simmons +13
Mergers play a complex role in galaxy formation and evolution. Continuing to improve our understanding of these systems require ever larger samples, which can be difficult (even im…
Galaxy Zoo: Kinematics of strongly and weakly barred galaxies
Tobias Géron, Rebecca J. Smethurst, Chris Lintott +8
We study the bar pattern speeds and corotation radii of 225 barred galaxies, using IFU data from MaNGA and the Tremaine-Weinberg method. Our sample, which is divided between strong…
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…
Gems of the Galaxy Zoos -- a Wide-Ranging Hubble Space Telescope Gap-Filler Program
William C. Keel, Jean Tate, O. Ivy Wong +13
We describe the Gems of the Galaxy Zoos (Zoo Gems) project, a gap-filler project using short windows in the Hubble Space Telescope's schedule. As with previous snapshot programs, t…
The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar and APOGEE-2 Data
Abdurro'uf, Katherine Accetta, Conny Aerts +337
This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the complete…
Quantifying the Poor Purity and Completeness of Morphological Samples Selected by Galaxy Colour
Rebecca J. Smethurst, Karen L. Masters, Brooke D. Simmons +7
The galaxy population is strongly bimodal in both colour and morphology, and the two measures correlate strongly, with most blue galaxies being late-types (spirals) and most early-…