Hintze Centre for Astrophysical Surveys

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MIGHTEE: Exploring the relationship between spectral index, redshift and radio luminosity

Monthly Notices of the Royal Astronomical Society (2025) staf209

Authors:

Siddhant Pinjarkar, Martin J Hardcastle, Dharam V Lal, Daniel JB Smith, Jos茅 Afonso, Davi Barbosa, Catherine L Hale, Matt J Jarvis, Sthabile Kolwa, Eric Murphy, Mattia Vaccari, Imogen H Whittam

Contemporaneous optical-radio observations of a fast radio burst in a close galaxy pair

(2025)

Authors:

KY Hanmer, I Pastor-Marazuela, J Brink, D Malesani, BW Stappers, PJ Groot, AJ Cooper, N Tejos, DAH Buckley, ED Barr, MC Bezuidenhout, S Bloemen, M Caleb, LN Driessen, R Fender, F Jankowski, M Kramer, DLA Pieterse, KM Rajwade, J Tian, PM Vreeswijk, R Wijnands, PA Woudt

Calibrating the absolute magnitude of type Ia supernovae in nearby galaxies using [OII] and implications for H0

Monthly Notices of the Royal Astronomical Society (2025) staf266

Authors:

M Dixon, J Mould, C Lidman, EN Taylor, C Flynn, AR Duffy, L Galbany, D Scolnic, TM Davis, A M枚ller, L Kelsey, J Lee, P Wiseman, M Vincenzi, P Shah, M Aguena, SS Allam, O Alves, D Bacon, S Bocquet, D Brooks, DL Burke, A Carnero Rosell, D Carollo, J Carretero, C Conselice, LN da Costa, MES Pereira, HT Diehl, P Doel, S Everett, I Ferrero, B Flaugher, J Frieman, J Garc铆a-Bellido, M Gatti, E Gaztanaga, G Giannini, D Gruen, RA Gruendl, G Gutierrez, K Herner, SR Hinton, DL Hollowood, K Honscheid, DJ James, K Kuehn, M Lima, JL Marshall, J Mena-Fern谩ndez, F Menanteau, R Miquel, J Myles, RC Nichol, RLC Ogando, A Palmese, A Pieres, AA Plazas Malag贸n, S Samuroff, E Sanchez, D Sanchez Cid, I Sevilla-Noarbe, M Smith, F Sobreira, E Suchyta, MEC Swanson, G Tarle, C To, BE Tucker, DL Tucker, V Vikram, AR Walker, N Weaverdyck

On the distance to the black hole X-ray binary Swift J1727.8$-$1613

(2025)

Authors:

Benjamin J Burridge, James CA Miller-Jones, Arash Bahramian, Steve R Prabu, Reagan Streeter, Noel Castro Segura, Jes煤s M Corral Santana, Christian Knigge, Evangelia Tremou, Francesco Carotenuto, Rob Fender, Payaswini Saikia

Structural decomposition of merger-free galaxies hosting luminous AGNs

Monthly Notices of the Royal Astronomical Society 91探花 University Press 537:4 (2025) 3511-3524

Authors:

Matthew J Fahey, Izzy L Garland, Brooke D Simmons, William C Keel, Jesse Shanahan, Alison Coil, Eilat Glikman, Chris J Lintott, Karen L Masters, Ed Moran, Rebecca J Smethurst, Tobias G茅ron, Matthew R Thorne

Abstract:

Active galactic nucleus (AGN) growth in disc-dominated, merger-free galaxies is poorly understood, largely due to the difficulty in disentangling the AGN emission from that of the host galaxy. By carefully separating this emission, we examine the differences between AGNs in galaxies hosting a (possibly) merger-grown, classical bulge, and AGNs in secularly grown, truly bulgeless disc galaxies. We use galfit to obtain robust, accurate morphologies of 100 disc-dominated galaxies imaged with the Hubble Space Telescope. Adopting an inclusive definition of classical bulges, we detect a classical bulge component in per cent of the galaxies. These bulges were not visible in Sloan Digital Sky Survey photometry, however these galaxies are still unambiguously disc-dominated, with an average bulge-to-total luminosity ratio of . We find some correlation between bulge mass and black hole mass for disc-dominated galaxies, though this correlation is significantly weaker in comparison to the relation for bulge-dominated or elliptical galaxies. Furthermore, a significant fraction ( per cent) of our black holes are overly massive when compared to the relationship for elliptical galaxies. We find a weak correlation between total stellar mass and black hole mass for the disc-dominated galaxies, hinting that the stochasticity of black hole鈥揼alaxy co-evolution may be higher in disc-dominated than bulge-dominated systems.