Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Deppe, Nils"'
Publikováno v:
Phys. Rev. D 109, 123019 (2024)
Relativistic plasmas around compact objects can sometimes be approximated as being force-free. In this limit, the plasma inertia is negligible and the overall dynamics is governed by global electric currents. We present a novel numerical approach for
Externí odkaz:
http://arxiv.org/abs/2404.01531
Autor:
Clarke, Teagan A., Isi, Maximiliano, Lasky, Paul D., Thrane, Eric, Boyle, Michael, Deppe, Nils, Kidder, Lawrence E., Mitman, Keefe, Moxon, Jordan, Nelli, Kyle C., Throwe, William, Vu, Nils L.
The ringdown portion of a binary black hole merger consists of a sum of modes, each containing an infinite number of tones that are exponentially damped sinusoids. In principle, these can be measured as gravitational-waves with observatories like LIG
Externí odkaz:
http://arxiv.org/abs/2402.02819
Autor:
Boschini, Matteo, Gerosa, Davide, Varma, Vijay, Armaza, Cristobal, Boyle, Michael, Bonilla, Marceline S., Ceja, Andrea, Chen, Yitian, Deppe, Nils, Giesler, Matthew, Kidder, Lawrence E., Kumar, Prayush, Lara, Guillermo, Long, Oliver, Ma, Sizheng, Mitman, Keefe, Nee, Peter James, Pfeiffer, Harald P., Ramos-Buades, Antoni, Scheel, Mark A., Vu, Nils L., Yoo, Jooheon
Publikováno v:
Phys.Rev.D 108 (2023) 8, 084015
Numerical-relativity surrogate models for both black-hole merger waveforms and remnants have emerged as important tools in gravitational-wave astronomy. While producing very accurate predictions, their applicability is limited to the region of the pa
Externí odkaz:
http://arxiv.org/abs/2307.03435
Autor:
Deppe, Nils, Kidder, Lawrence E., Teukolsky, Saul A., Bonilla, Marceline S., Hébert, François, Kim, Yoonsoo, Scheel, Mark A., Throwe, William, Vu, Nils L.
We present an adaptive-order positivity-preserving conservative finite-difference scheme that allows a high-order solution away from shocks and discontinuities while guaranteeing positivity and robustness at discontinuities. This is achieved by monit
Externí odkaz:
http://arxiv.org/abs/2306.04755
Autor:
Pajkos, Michael A., VanCamp, Steven J., Pan, Kuo-Chuan, Vartanyan, David, Deppe, Nils, Couch, Sean M.
We analyze the directional dependence of the gravitational wave (GW) emission from 15 3D neutrino radiation hydrodynamic simulations of core-collapse supernovae. Using spin weighted spherical harmonics, we develop a new analytic technique to quantify
Externí odkaz:
http://arxiv.org/abs/2306.01919
Simulating neutron stars with a flexible enthalpy-based equation of state parametrization in SpECTRE
Autor:
Legred, Isaac, Kim, Yoonsoo, Deppe, Nils, Chatziioannou, Katerina, Foucart, Francois, Hébert, François, Kidder, Lawrence E.
Numerical simulations of neutron star mergers represent an essential step toward interpreting the full complexity of multimessenger observations and constraining the properties of supranuclear matter. Currently, simulations are limited by an array of
Externí odkaz:
http://arxiv.org/abs/2301.13818
Autor:
Mitman, Keefe, Lagos, Macarena, Stein, Leo C., Ma, Sizheng, Hui, Lam, Chen, Yanbei, Deppe, Nils, Hébert, François, Kidder, Lawrence E., Moxon, Jordan, Scheel, Mark A., Teukolsky, Saul A., Throwe, William, Vu, Nils L.
Publikováno v:
Phys. Rev. Lett. 130, 081402 (2023)
The gravitational wave strain emitted by a perturbed black hole (BH) ringing down is typically modeled analytically using first-order BH perturbation theory. In this Letter we show that second-order effects are necessary for modeling ringdowns from B
Externí odkaz:
http://arxiv.org/abs/2208.07380
Autor:
Zertuche, Lorena Magaña, Mitman, Keefe, Khera, Neev, Stein, Leo C., Boyle, Michael, Deppe, Nils, Hébert, François, Iozzo, Dante A. B., Kidder, Lawrence E., Moxon, Jordan, Pfeiffer, Harald P., Scheel, Mark A., Teukolsky, Saul A., Throwe, William, Vu, Nils
Publikováno v:
Phys. Rev. D 105, 104015 (2022)
Quasi-normal mode (QNM) modeling is an invaluable tool for characterizing remnant black holes, studying strong gravity, and testing GR. Only recently have QNM studies begun to focus on multimode fitting to numerical relativity (NR) strain waveforms.
Externí odkaz:
http://arxiv.org/abs/2110.15922
Autor:
Deppe, Nils, Hébert, François, Kidder, Lawrence E., Throwe, William, Anantpurkar, Isha, Armaza, Cristóbal, Bonilla, Gabriel S., Boyle, Michael, Chaudhary, Himanshu, Duez, Matthew D., Vu, Nils L., Foucart, Francois, Giesler, Matthew, Guo, Jason S., Kim, Yoonsoo, Kumar, Prayush, Legred, Isaac, Li, Dongjun, Lovelace, Geoffrey, Ma, Sizheng, Macedo, Alexandra, Melchor, Denyz, Morales, Marlo, Moxon, Jordan, Nelli, Kyle C., O'Shea, Eamonn, Pfeiffer, Harald P., Ramirez, Teresita, Rüter, Hannes R., Sanchez, Jennifer, Scheel, Mark A., Thomas, Sierra, Vieira, Daniel, Wittek, Nikolas A., Wlodarczyk, Tom, Teukolsky, Saul A.
Discontinuous Galerkin methods are popular because they can achieve high order where the solution is smooth, because they can capture shocks while needing only nearest-neighbor communication, and because they are relatively easy to formulate on compl
Externí odkaz:
http://arxiv.org/abs/2109.12033
We present a discontinuous Galerkin-finite-difference hybrid scheme that allows high-order shock capturing with the discontinuous Galerkin method for general relativistic magnetohydrodynamics. The hybrid method is conceptually quite simple. An unlimi
Externí odkaz:
http://arxiv.org/abs/2109.11645