3 papers
astro-ph.GA2025
Unveiling a 36 Billion Solar Mass Black Hole at the Centre of the Cosmic Horseshoe Gravitational Lens
Carlos R. Melo-Carneiro, Thomas E. Collett, Lindsay J. Oldham +4
Supermassive black holes (SMBHs) are found at the centre of every massive galaxy, with their masses tightly connected to their host galaxies through a co-evolution over cosmic time…
astro-ph.GA2025
Stars as cosmic scales: measuring stellar mass with microlensed supernovae
Luke Weisenbach, Thomas Collett, Wolfgang Enzi +2
Gravitational microlensing is a unique probe of the stellar content in strong lens galaxies. Flux ratio anomalies from gravitationally lensed supernovae (glSNe), just like lensed q…
astro-ph.CO2025
Correcting for Selection Biases in the Determination of the Hubble Constant from Time-Delay Cosmography
Tian Li, Thomas E. Collett, Philip J. Marshall +4
The time delay between multiple images of strongly lensed quasars has been used to infer the Hubble constant. The primary systematic uncertainty for time-delay cosmography is the m…