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pro vyhledávání: '"Ryan, Geoffrey"'
Multi-messenger observations of coalescing binary neutron stars (BNSs) are a direct probe of the expansion history of the universe and carry the potential to shed light on the disparity between low- and high-redshift measurements of the Hubble consta
Externí odkaz:
http://arxiv.org/abs/2406.11965
In this chapter, we give an overview of our current understanding of the physics of accreting massive black hole binaries (MBHBs), with a special focus on the latest developments in numerical simulations and General-Relativistic Magnetohydrodynamics
Externí odkaz:
http://arxiv.org/abs/2405.14843
Autor:
Duffell, Paul C., Dittmann, Alexander J., D'Orazio, Daniel J., Franchini, Alessia, Kratter, Kaitlin M., Penzlin, Anna B. T., Ragusa, Enrico, Siwek, Magdalena, Tiede, Christopher, Wang, Haiyang, Zrake, Jonathan, Dempsey, Adam M., Haiman, Zoltan, Lupi, Alessandro, Pirog, Michal, Ryan, Geoffrey
We have performed numerical calculations of a binary interacting with a gas disk, using eleven different numerical methods and a standard binary-disk setup. The goal of this study is to determine whether all codes agree on a numerically converged sol
Externí odkaz:
http://arxiv.org/abs/2402.13039
Autor:
van Eerten, Hendrik, Ryan, Geoffrey
Models for gamma-ray burst afterglow dynamics and synchrotron spectra are known to exhibit various scale invariances, owing to the scale-free nature of fluid dynamics and the power-law shape of synchrotron spectra. Since GRB 170817A, off-axis jet mod
Externí odkaz:
http://arxiv.org/abs/2310.08952
Autor:
Dittmann, Alexander J., Ryan, Geoffrey
Circumbinary accretion occurs throughout the universe, from the formation of stars and planets to the aftermath of major galactic mergers. We present an extensive investigation of circumbinary accretion disks, studying circular binaries with mass rat
Externí odkaz:
http://arxiv.org/abs/2310.07758
Autor:
Ryan, Geoffrey, van Eerten, Hendrik, Troja, Eleonora, Piro, Luigi, O'Connor, Brendan, Ricci, Roberto
The arrival of gravitational wave astronomy and a growing number of time-domain focused observatories are set to lead to a increasing number of detections of short gamma-ray bursts (GRBs) launched with a moderate inclination to Earth. Being nearby ev
Externí odkaz:
http://arxiv.org/abs/2310.02328
Autor:
Gianfagna, Giulia, Piro, Luigi, Pannarale, Francesco, Van Eerten, Hendrik, Ricci, Fulvio, Ryan, Geoffrey
GW170817 is a binary neutron star merger that exhibited a gravitational wave (GW) and a gamma-ray burst, followed by an afterglow. In this work, we estimate the Hubble constant ($H_0$) using broad-band afterglow emission and relativistic jet motion f
Externí odkaz:
http://arxiv.org/abs/2309.17073
Autor:
Yang, Yu-Han, Troja, Eleonora, O'Connor, Brendan, Fryer, Chris L., Im, Myungshin, Durbak, Joe, Paek, Gregory S. H., Ricci, Roberto, De Bom, Clécio R., Gillanders, James H., Castro-Tirado, Alberto J., Peng, Zong-Kai, Dichiara, Simone, Ryan, Geoffrey, van Eerten, Hendrik, Dai, Zi-Gao, Chang, Seo-Won, Choi, Hyeonho, De, Kishalay, Hu, Youdong, Kilpatrick, Charles D., Kutyrev, Alexander, Jeong, Mankeun, Lee, Chung-Uk, Makler, Martin, Navarete, Felipe, Pérez-García, Ignacio
Kilonovae are a rare class of astrophysical transients powered by the radioactive decay of nuclei heavier than iron, synthesized in the merger of two compact objects. Over the first few days, the kilonova evolution is dominated by a large number of r
Externí odkaz:
http://arxiv.org/abs/2308.00638
We have investigated, both analytically and numerically, accreting supermassive black hole binaries as they inspiral due to gravitational radiation to elucidate the decoupling of binaries from their disks and inform future multi-messenger observation
Externí odkaz:
http://arxiv.org/abs/2303.16204
Autor:
Gianfagna, Giulia, Piro, Luigi, Pannarale, Francesco, Van Eerten, Hendrik, Ricci, Fulvio, Ryan, Geoffrey, Troja, Eleonora
On August 17, 2017, Advanced LIGO and Virgo observed GW170817, the first gravitational-wave (GW) signal from a binary neutron star merger. It was followed by a short-duration gamma-ray burst, GRB 170817A, and by a non-thermal afterglow emission. In t
Externí odkaz:
http://arxiv.org/abs/2212.01104