Recent Publications
- Yadav, M., Troja, E., Ricci, R., Yang, Y. -H., Wieringa, M. H., O’Connor, B., . . . Busmann, M. (2025). Radio Observations Point to a Moderately Relativistic Outflow in the Fast X-Ray Transient EP241021a. The Astrophysical Journal, 995(2), 216. doi:10.3847/1538-4357/ae1746
- O’Connor, B., Ricci, R., Troja, E., Palmese, A., Yang, Y. -H., Ryan, G., . . . Hernandez, I. M. (2025). AT2025ulz and S250818k: Deep X-Ray and Radio Limits on Off-axis Afterglow Emission and Prospects for Future Discovery. The Astrophysical Journal Letters, 995(2), l47. doi:10.3847/2041-8213/ae16a6
- Busmann, M., O'Connor, B., Sommer, J., Gruen, D., Beniamini, P., Gill, R., . . . Zeimann, G. R. (2025). The curious case of EP241021a: Unraveling the mystery of its exceptional rebrightening. doi:10.48550/arxiv.2503.14588
- Yadav, M., Troja, E., Ricci, R., Yang, Y. -H., Wieringa, M. H., O'Connor, B., . . . Busmann, M. (2025). Radio observations point to a moderately relativistic outflow in the fast X-ray transient EP241021a. doi:10.48550/arxiv.2505.08781
- Busmann, M., O’Connor, B., Sommer, J., Gruen, D., Beniamini, P., Gill, R., . . . Zeimann, G. R. (2025). The curious case of EP241021a: Unraveling the mystery of its exceptional rebrightening. Astronomy & Astrophysics, 701, a225. doi:10.1051/0004-6361/202554626
- O'Connor, B., Ricci, R., Troja, E., Palmese, A., Yang, Y. -H., Ryan, G., . . . Hernandez, I. M. (2025). AT2025ulz and S250818k: Deep X-ray and radio limits on off-axis afterglow emission and prospects for future discovery. doi:10.48550/arxiv.2510.23728
- Ryan, G., van Eerten, H., Troja, E., Piro, L., O’Connor, B., & Ricci, R. (2024). Modeling of Long-term Afterglow Counterparts to Gravitational Wave Events: The Full View of GRB 170817A. The Astrophysical Journal, 975(1), 131. doi:10.3847/1538-4357/ad6a14
- Freeburn, J., O'Connor, B., Cooke, J., Dobie, D., Möller, A., Tejos, N., . . . Webb, S. (2024). GRB$\,$220831A: a hostless, intermediate Gamma-ray burst with an unusual optical afterglow. doi:10.48550/arxiv.2411.14749
- Müller, M., Mukherjee, S., & Ryan, G. (2024). Be Careful in Multimessenger Inference of the Hubble Constant: A Path Forward for Robust Inference. The Astrophysical Journal Letters, 977(2), l45. doi:10.3847/2041-8213/ad8dd1
- O’Connor, B., Pasham, D., Andreoni, I., Hare, J., Beniamini, P., Troja, E., . . . Sakamoto, T. (2025). Characterization of a Peculiar Einstein Probe Transient EP240408a: An Exotic Gamma-Ray Burst or an Abnormal Jetted Tidal Disruption Event?. The Astrophysical Journal Letters, 979(2), l30. doi:10.3847/2041-8213/ada7f5
- Freeburn, J., O’Connor, B., Cooke, J., Dobie, D., Möller, A., Tejos, N., . . . Webb, S. (2025). GRB 220831A: a hostless, intermediate gamma-ray burst with an unusual optical afterglow. Monthly Notices of the Royal Astronomical Society, 537(2), 2061-2078. doi:10.1093/mnras/staf147
- Srinivasaragavan, G. P., Perley, D. A., Ho, A. Y. Q., O’Connor, B., de Ugarte Postigo, A., Sarin, N., . . . Wold, A. (2025). Multiwavelength analysis of AT 2023sva: a luminous orphan afterglow with evidence for a structured jet. Monthly Notices of the Royal Astronomical Society, 538(1), 351-372. doi:10.1093/mnras/staf290
- Gutiérrez, E. M., Combi, L., & Ryan, G. (2025). Accretion Onto Supermassive Black Hole Binaries. In New Frontiers in GRMHD Simulations (pp. 447-492). Springer Nature. doi:10.1007/978-981-97-8522-3_14
- Li, M. L., Ho, A. Y. Q., Ryan, G., Perley, D. A., Lamb, G. P., Nayana, A. J., . . . Vanderbosch, Z. (2025). The Nature of Optical Afterglows without Gamma-Ray Bursts: Identification of AT2023lcr and Multiwavelength Modeling. The Astrophysical Journal, 985(1), 124. doi:10.3847/1538-4357/adc800
- Gianfagna, G., Piro, L., Pannarale, F., Van Eerten, H., Ricci, F., Ryan, G., & Troja, E. (2023). Joint analysis of gravitational-wave and electromagnetic data of mergers: breaking an afterglow model degeneracy in GW170817 and in future events. Monthly Notices of the Royal Astronomical Society, 523(3), 4771-4784. doi:10.1093/mnras/stad1728
- O'Connor, B., Troja, E., Ryan, G., Beniamini, P., van Eerten, H., Granot, J., . . . Zhirkov, K. (2023). A structured jet explains the extreme GRB 221009A. Science Advances, 9(23), eadi1405. doi:10.1126/sciadv.adi1405
- Dittmann, A. J., Ryan, G., & Miller, M. C. (2023). The Decoupling of Binaries from Their Circumbinary Disks. The Astrophysical Journal Letters, 949(2), l30. doi:10.3847/2041-8213/acd183
- Hinds, K. R., Oates, S. R., Nicholl, M., Patel, J., Omodei, N., Gompertz, B., . . . Ryan, G. (2023). Evidence for a luminosity-decay correlation in GRB GeV light curves. doi:10.48550/arxiv.2309.08493
- Ryan, G., van Eerten, H., Troja, E., Piro, L., O'Connor, B., & Ricci, R. (2023). Modelling of Long-Term Afterglow Counterparts to Gravitational Wave Events: The Full View of GRB 170817A. doi:10.48550/arxiv.2310.02328
- van Eerten, H., & Ryan, G. (2023). Scaling relations for gamma-ray burst afterglow light curves and centroid motion independent of jet structure and dynamics. doi:10.48550/arxiv.2310.08952
- Hinds, K. R., Oates, S. R., Nicholl, M., Patel, J., Omodei, N., Gompertz, B., . . . Ryan, G. (2023). Evidence for a luminosity–decay correlation in GRB GeV light curves. Monthly Notices of the Royal Astronomical Society, 526(3), 3400-3406. doi:10.1093/mnras/stad2875
- Gianfagna, G., Piro, L., Pannarale, F., Van Eerten, H., Ricci, F., & Ryan, G. (2024). Potential biases and prospects for the Hubble constant estimation via electromagnetic and gravitational-wave joint analyses. Monthly Notices of the Royal Astronomical Society, 528(2), 2600-2613. doi:10.1093/mnras/stae198
- Duffell, P. C., Dittmann, A. J., D'Orazio, D. J., Franchini, A., Kratter, K. M., Penzlin, A. B. T., . . . Ryan, G. (2024). The Santa Barbara Binary-Disk Code Comparison. doi:10.48550/arxiv.2402.13039
- Yang, Y. -H., Troja, E., O’Connor, B., Fryer, C. L., Im, M., Durbak, J., . . . Pérez-García, I. (2024). A lanthanide-rich kilonova in the aftermath of a long gamma-ray burst. Nature, 626(8000), 742-745. doi:10.1038/s41586-023-06979-5
- van Eerten, H. J., & Ryan, G. S. (2024). Scaling relations for gamma-ray burst afterglow light curves and centroid motion independent of jet structure and dynamics. Monthly Notices of the Royal Astronomical Society, 530(4), 4094-4106. doi:10.1093/mnras/stae1128
- Dittmann, A. J., & Ryan, G. (2024). The Evolution of Accreting Binaries: From Brown Dwarfs to Supermassive Black Holes. The Astrophysical Journal, 967(1), 12. doi:10.3847/1538-4357/ad2f1e
- Gutiérrez, E. M., Combi, L., & Ryan, G. (2024). Accretion onto supermassive black hole binaries. doi:10.48550/arxiv.2405.14843
- Duffell, P. C., Dittmann, A. J., D’Orazio, D. J., Franchini, A., Kratter, K. M., Penzlin, A. B. T., . . . Ryan, G. (2024). The Santa Barbara Binary-disk Code Comparison. The Astrophysical Journal, 970(2), 156. doi:10.3847/1538-4357/ad5a7e
Seminars
- Lecture - Numerical Methods (Core), PHYS 777, Numerical Methods (Core), PHYS 777-006, Jan 5 - Feb 6, 2026, 2026/01/14, PIRSA:26010005
- Lecture - Numerical Methods (Core), PHYS 777, Numerical Methods (Core), PHYS 777-006, Jan 5 - Feb 6, 2026, 2026/01/13, PIRSA:26010004
- Lecture - Numerical Methods (Core), PHYS 777, Numerical Methods (Core), PHYS 777-006, Jan 5 - Feb 6, 2026, 2026/01/07, PIRSA:26010003
- Lecture - Numerical Methods (Core), PHYS 777, Numerical Methods (Core), PHYS 777-006, Jan 5 - Feb 6, 2026, 2026/01/06, PIRSA:26010002
- Lecture - Numerical Methods (Core), PHYS 777, Numerical Methods (Core), PHYS 777-006, Jan 5 - Feb 6, 2026, 2026/01/05, PIRSA:26010001
- Binary AGN, Future Prospects of Intensity Interferometry, 2024/11/01, PIRSA:24110040