{"paper":{"title":"General Relativistic Magnetohydrodynamic Simulations of Blandford-Znajek Jets and the Membrane Paradigm","arxiv_id":"1307.4752","primary_cat":"astro-ph.HE","submitted_at":"2013-07-17T20:00:00+00:00","version_compiled":"v1"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13-20260917 on the question bank abstract-p1-20260923, exactly as returned. No sentence in this record was written by a language model.","schema":"pith.compiled-record/v0","status":"compiled","abstract":{"source":"arXiv listing abstract v1","sentences":[{"i":0,"p":1.0,"id":"s0","own":false,"role":"background","text":"Recently it has been observed that the scaling of jet power with black hole spin in galactic X-ray binaries is consistent with the predictions of the Blandford-Znajek (BZ) jet model.","hedge":{"p":0.94,"label":"hedged_possibility"},"own_p":0.07,"main_claim_p":0.04,"quantitative":false,"quantitative_p":0.18,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":1.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":1,"p":0.64,"id":"s1","own":false,"role":"method","text":"These observations motivate us to revisit the BZ model using general relativistic magnetohydrodynamic simulations of magnetized jets from accreting (h/r ~ 0.3), spinning (0 < a_* < 0.98) black holes.","hedge":{"p":0.73,"label":"asserted"},"own_p":0.24,"main_claim_p":0.03,"quantitative":true,"quantitative_p":0.93,"role_probabilities":{"gap":0.0,"method":0.64,"result":0.0,"background":0.09,"limitation":0.0,"future_work":0.0,"contribution":0.27,"interpretation":0.0}},{"i":2,"p":0.78,"id":"s2","own":true,"role":"contribution","text":"We have three main results.","hedge":{"p":0.55,"label":"asserted"},"own_p":0.51,"main_claim_p":0.03,"quantitative":true,"quantitative_p":0.57,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.22,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.78,"interpretation":0.0}},{"i":3,"p":1.0,"id":"s3","own":true,"role":"result","text":"First, we quantify the discrepancies between the BZ jet power and our simulations: assuming maximum efficiency and uniform fields on the horizon leads to a ~10% overestimate of jet power, while ignoring the accretion disk leads to a further ~50% overestimate.","hedge":{"p":0.99,"label":"asserted"},"own_p":0.92,"main_claim_p":0.11,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":1.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":4,"p":0.98,"id":"s4","own":true,"role":"result","text":"Simply reducing the standard BZ jet power prediction by 60% gives a good fit to our simulation data.","hedge":{"p":0.98,"label":"asserted"},"own_p":0.89,"main_claim_p":0.1,"quantitative":true,"quantitative_p":0.99,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.98,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.02}},{"i":5,"p":0.99,"id":"s5","own":true,"role":"result","text":"Our second result is to show that the membrane formulation of the BZ model correctly describes the physics underlying simulated jets: torques, dissipation, and electromagnetic fields on the horizon.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.94,"main_claim_p":0.14,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.99,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.01}},{"i":6,"p":0.99,"id":"s6","own":true,"role":"interpretation","text":"This provides intuitive yet rigorous pictures for the black hole energy extraction process.","hedge":{"p":0.99,"label":"asserted"},"own_p":0.5,"main_claim_p":0.06,"quantitative":false,"quantitative_p":0.03,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.01,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.99}},{"i":7,"p":1.0,"id":"s7","own":true,"role":"result","text":"Third, we compute the effective resistance of the load region and show that the load and the black hole achieve near perfect impedance matching.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.97,"main_claim_p":0.08,"quantitative":false,"quantitative_p":0.43,"role_probabilities":{"gap":0.0,"method":0.0,"result":1.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":8,"p":1.0,"id":"s8","own":false,"role":"interpretation","text":"Taken together, these results increase our confidence in the BZ model as the correct description of jets observed from astrophysical black holes.","hedge":{"p":0.54,"label":"hedged_possibility"},"own_p":0.48,"main_claim_p":0.89,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":1.0}}]},"compiled":{"main_claim":{"p":1.0,"text":"Taken together, these results increase our confidence in the BZ model as the correct description of jets observed from astrophysical black holes.","location":"abstract 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