Geoffrey Ryan
Recent Publications
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- Troja, E., Fryer, C. L., O’Connor, B., Ryan, G., Dichiara, S., Kumar, A., . . . Castro-Tirado, A. J. (2022). A nearby long gamma-ray burst from a merger of compact objects. Nature, 612(7939), 228-231. doi:10.1038/s41586-022-05327-3
- Piro, L., Ahlers, M., Coleiro, A., Colpi, M., de Oña Wilhelmi, E., Guainazzi, M., . . . van Eerten, H. (2022). Athena synergies in the multi-messenger and transient universe. Experimental Astronomy, 54(1), 23-117. doi:10.1007/s10686-022-09865-6
- Neill, D., Tsang, D., van Eerten, H., Ryan, G., & Newton, W. G. (2022). Resonant shattering flares in black hole-neutron star and binary neutron star mergers. Monthly Notices of the Royal Astronomical Society, 514(4), 5385-5402. doi:10.1093/mnras/stac1645
- Dichiara, S., Troja, E., Beniamini, P., O’Connor, B., Moss, M., Lien, A. Y., . . . Sakamoto, T. (2022). Erratum: “Evidence of Extended Emission in GRB 181123B and Other High-redshift Short GRBs” (2021, ApJL, 911, 28). The Astrophysical Journal Letters, 934(1), l16. doi:10.3847/2041-8213/ac7ff1
- Dittmann, A. J., & Ryan, G. (2022). A survey of disc thickness and viscosity in circumbinary accretion: Binary evolution, variability, and disc morphology. Monthly Notices of the Royal Astronomical Society, 513(4), 6158-6176. doi:10.1093/mnras/stac935
- Dichiara, S., Troja, E., Lipunov, V., Ricci, R., Oates, S. R., Butler, N. R., . . . Buckley, D. A. H. (2022). The early afterglow of GRB 190829A. Monthly Notices of the Royal Astronomical Society, 512(2), 2337-2349. doi:10.1093/mnras/stac454
- Troja, E., O’Connor, B., Ryan, G., Piro, L., Ricci, R., Zhang, B., . . . van Eerten, H. (2021). Accurate flux calibration of GW170817: is the X-ray counterpart on the rise?. Monthly Notices of the Royal Astronomical Society, 510(2), 1902-1909. doi:10.1093/mnras/stab3533
- Dittmann, A. J., & Ryan, G. (2021). Preventing Anomalous Torques in Circumbinary Accretion Simulations. The Astrophysical Journal, 921(1), 71. doi:10.3847/1538-4357/ac1bbd
- Ahumada, T., Singer, L. P., Anand, S., Coughlin, M. W., Kasliwal, M. M., Ryan, G., . . . Valeev, A. F. (2021). Author Correction: Discovery and confirmation of the shortest gamma-ray burst from a collapsar. Nature Astronomy, 5(11), 1179. doi:10.1038/s41550-021-01501-1
- Ahumada, T., Singer, L. P., Anand, S., Coughlin, M. W., Kasliwal, M. M., Ryan, G., . . . Valeev, A. F. (2021). Discovery and confirmation of the shortest gamma-ray burst from a collapsar. Nature Astronomy, 5(9), 917-927. doi:10.1038/s41550-021-01428-7
- Dichiara, S., Troja, E., Beniamini, P., O’Connor, B., Moss, M., Lien, A. Y., . . . Sakamoto, T. (2021). Evidence of Extended Emission in GRB 181123B and Other High-redshift Short GRBs. The Astrophysical Journal Letters, 911(2), l28. doi:10.3847/2041-8213/abf562
- Kelly, B. J., Etienne, Z. B., Golomb, J., Schnittman, J. D., Baker, J. G., Noble, S. C., & Ryan, G. (2021). Electromagnetic emission from a binary black hole merger remnant in plasma: Field alignment and plasma temperature. Physical Review D, 103(6), 063039. doi:10.1103/physrevd.103.063039
- O’Connor, B., Troja, E., Dichiara, S., Chase, E. A., Ryan, G., Cenko, S. B., . . . Sakamoto, T. (n.d.). A tale of two mergers: constraints on kilonova detection in two short GRBs at z ~ 0.5. Monthly Notices of the Royal Astronomical Society, 502(1), 1279-1298. doi:10.1093/mnras/stab132
Seminars
- Binary AGN, Future Prospects of Intensity Interferometry, 2024/11/01, PIRSA:24110040