James Petley's Outputs (3)

A decade of sub-arcsecond imaging with the International LOFAR Telescope (2025)
Journal Article
Morabito, L. K., Jackson, N., de Jong, J., Escott, E., Groeneveld, C., Mahatma, V., Petley, J., Sweijen, F., Timmerman, R., & van Weeren, R. J. (2025). A decade of sub-arcsecond imaging with the International LOFAR Telescope. Astrophysics and Space Science, 370(2), Article 19. https://doi.org/10.1007/s10509-025-04406-x

The International LOFAR Telescope (ILT) is a pan-European radio interferometer with baselines up to 2000 km. This provides sub-arcsecond resolution at frequencies of <200 MHz. Since starting science operations in 2012, the ILT has carried out observa...

Connection between steep radio spectral slopes and dust extinction in QSOs: evidence for outflow-driven shocks in dusty QSOs (2025)
Journal Article
Fawcett, V. A., Harrison, C. M., Alexander, D. M., Morabito, L. K., Kharb, P., Rosario, D. J., Baghel, J., Ghosh, S., Sasikumar, S., Petley, J., Sargent, C., & Calistro Rivera, G. (2025). Connection between steep radio spectral slopes and dust extinction in QSOs: evidence for outflow-driven shocks in dusty QSOs. Monthly Notices of the Royal Astronomical Society, 537(2), 2003-2023. https://doi.org/10.1093/mnras/staf105

Recent studies have found a striking positive correlation between the amount of dust obscuration and enhanced radio emission in quasi-stellar objects (QSOs). However, what causes this connection remains unclear. In this paper we analyse uGMRT Band-3... Read More about Connection between steep radio spectral slopes and dust extinction in QSOs: evidence for outflow-driven shocks in dusty QSOs.

A novel Bayesian approach for decomposing the radio emission of quasars – II. Link between quasar radio emission and black hole mass (2025)
Journal Article
Yue, B. H., Duncan, K. J., Best, P. N., Arnaudova, M. I., Morabito, L. K., Petley, J. W., Röttgering, H. J. A., Shenoy, S., & Smith, D. J. B. (2025). A novel Bayesian approach for decomposing the radio emission of quasars – II. Link between quasar radio emission and black hole mass. Monthly Notices of the Royal Astronomical Society, 537(2), 858-875. https://doi.org/10.1093/mnras/staf077

Whether the mass of supermassive black hole ( M BH ) is directly linked to the quasar radio luminosity remains a long-debated issue, and understanding the role of M BH in the evolution of quasars is pivotal to unveiling the mechanism of active galact... Read More about A novel Bayesian approach for decomposing the radio emission of quasars – II. Link between quasar radio emission and black hole mass.