Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
fundA Canadian funder is recorded on the work.
VenueThe Astrophysical Journal Supplement Series · 2019
Typearticle
Languageen
FieldPhysics and Astronomy
TopicAstrophysical Phenomena and Observations
Canadian institutionsCanadian Institute for Theoretical AstrophysicsCanadian Institute for Advanced ResearchUniversity of TorontoPerimeter InstituteUniversity of Waterloo
FundersLos Alamos National LaboratoryOffice of International Science and EngineeringNational Key Research and Development Program of ChinaConsejo Nacional de Ciencia y TecnologíaDirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de MéxicoJapan Society for the Promotion of ScienceLeibniz-GemeinschaftChina Scholarship CouncilJohn Templeton FoundationMinistry of Education, Culture, Sports, Science and TechnologyMinisterio de Economía y CompetitividadNatural Sciences and Engineering Research Council of CanadaNational Nuclear Security AdministrationInstitut Périmètre de physique théoriqueRecruitment Program of Global ExpertsUniversidad Nacional Autónoma de MéxicoLeibniz-RechenzentrumNational Natural Science Foundation of ChinaNational Research Foundation of KoreaGovernment of CanadaNational Institutes of Natural SciencesMinisterio de Ciencia, Innovación y UniversidadesNuclear Safety and Security CommissionComisión Nacional de Investigación Científica y TecnológicaGoddard Space Flight CenterGordon and Betty Moore FoundationMinistero dell’Istruzione, dell’Università e della RicercaGeneralitat ValencianaAcademy of FinlandMax-Planck-GesellschaftLawrence Livermore National LaboratoryChinese Academy of SciencesNederlandse Organisatie voor Wetenschappelijk OnderzoekInstituto de Astrofísica de AndalucíaHarvard UniversityGauss Centre for SupercomputingToray Science FoundationNational Research FoundationVetenskapsrådetU.S. Department of EnergyLeverhulme TrustEuropean CommissionNational Radio Astronomy ObservatoryCompute CanadaUniversities Space Research AssociationInternational Max Planck Research School for Environmental, Cellular and Molecular MicrobiologyNational Science FoundationAcademia SinicaIstituto Nazionale di Fisica NucleareDepartment of Science and Technology, Ministry of Science and Technology, IndiaRussian Science FoundationNational Aeronautics and Space Administration
KeywordsPhysicsEvent horizonMagnetorotational instabilityMagnetohydrodynamic driveGeneral relativityNeutron starAstrophysicsBlack hole (networking)Event (particle physics)MagnetohydrodynamicsTheoretical physicsComputer scienceMagnetic fieldComputer security
Abstract
fetched live from OpenAlexAbstract Recent developments in compact object astrophysics, especially the discovery of merging neutron stars by LIGO, the imaging of the black hole in M87 by the Event Horizon Telescope, and high- precision astrometry of the Galactic Center at close to the event horizon scale by the GRAVITY experiment motivate the development of numerical source models that solve the equations of general relativistic magnetohydrodynamics (GRMHD). Here we compare GRMHD solutions for the evolution of a magnetized accretion flow where turbulence is promoted by the magnetorotational instability from a set of nine GRMHD codes: Athena++ , BHAC , Cosmos++ , ECHO , H-AMR , iharm3D , HARM-Noble , IllinoisGRMHD , and KORAL . Agreement among the codes improves as resolution increases, as measured by a consistently applied, specially developed set of code performance metrics. We conclude that the community of GRMHD codes is mature, capable, and consistent on these test problems.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: Theoretical or conceptual
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.440
Threshold uncertainty score0.885
Codex and Gemma teacher scores by category
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
Teacher spread0.253 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
