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SUMMARY:Accretion onto Black Hole Binaries: New insights from 3D-GRMHD sim
 ulations - Mark Avara
DTSTART:20230614T121500Z
DTEND:20230614T130500Z
UID:TALK202387@talks.cam.ac.uk
CONTACT:107642
DESCRIPTION: While several promising candidate supermassive black hole bin
 aries have been identified\, more realistic physical modelling of these sy
 stems will be necessary to confirm their identity and perform robust searc
 hes in the era of big-data astronomy. Unfortunately\, the large range of t
 emporal and physical scales and wide parameter space have historically mad
 e their modelling prohibitive when performed via full 3D general relativis
 tic magnetohydrodynamic simulations (3D-GRMHD).I will first demonstrate th
 e necessity of this type of modelling\, despite its complexity and computa
 tional expense\, and briefly describe the novel numerical tools we employ.
  I will present our recent 3D-GRMHD simulations which extend longer in dur
 ation than comparable prior models and achieve higher resolution and globa
 l realism\, made possible by using our new multi-domain/multi-physics code
 \, PatchworkMHD. With these improvements we have found unexpected 3D hydro
 dynamical and magnetic behaviour that is guiding us towards unique binary 
 observational signatures. In ongoing and future time-domain observational 
 surveys like Vera Rubin Observatory’s LSST\, these unique signatures wil
 l be key to confirming the identity of binary black hole systems and secur
 ing them as a cornerstone of multi-messenger astrophysics.
LOCATION:The Hoyle Lecture Theatre + Zoom 
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