Disk Tearing Leads to Low and High Frequency Quasi Periodic Oscillations in a GRMHD Simulation of a Thin Accretion Disk. Musoke, G., Liska, M., Porth, O., van der Klis, M., & Ingram, A. arXiv e-prints, January, 2022. ADS Bibcode: 2022arXiv220103085M Type: article![Disk Tearing Leads to Low and High Frequency Quasi Periodic Oscillations in a GRMHD Simulation of a Thin Accretion Disk [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex Black hole X-ray binaries (BHXRBs) display a wide range of variability phenomena, from long duration spectral state changes to short-term broadband variability and quasi-periodic oscillations (QPOs). A particularly puzzling aspect is the production of QPOs, which – if properly understood – could be used as a powerful diagnostic tool of black hole accretion and evolution. In this work we analyse a high resolution three-dimensional general relativistic magnetohydrodynamic simulation of a geometrically thin accretion disk which is tilted by $65{\textasciicircum}\{{\}circ\}$ with respect to the black hole spin axis. We find that the Lense-Thirring torque from the rapidly spinning 10 $M_{\}odot$ black hole causes several sub-disks to tear off within ${\}sim 10-20$ gravitational radii. Tearing occurs in cycles on timescales of seconds. During each tearing cycle the inner sub-disk precesses for 1-5 periods before it falls into the black hole. We find a precession frequency of ${\}sim 3{\}rm Hz$, consistent with observed low-frequency QPOs. In addition, we find a high frequency QPO (HFQPO) with centroid frequency of ${\}sim55$Hz in the power spectra of the mass-weighted radius of the inner disk. This signal is caused by radial epicyclic oscillations of a dense ring of gas at the tearing radius, which strongly suggests a corresponding modulation of the X-ray lightcurve and may thus explain some of the observed HFQPOs.
@article{musoke_disk_2022,
title = {Disk {Tearing} {Leads} to {Low} and {High} {Frequency} {Quasi} {Periodic} {Oscillations} in a {GRMHD} {Simulation} of a {Thin} {Accretion} {Disk}},
url = {https://ui.adsabs.harvard.edu/abs/2022arXiv220103085M},
abstract = {Black hole X-ray binaries (BHXRBs) display a wide range of variability phenomena, from long duration spectral state changes to short-term broadband variability and quasi-periodic oscillations (QPOs). A particularly puzzling aspect is the production of QPOs, which -- if properly understood -- could be used as a powerful diagnostic tool of black hole accretion and evolution. In this work we analyse a high resolution three-dimensional general relativistic magnetohydrodynamic simulation of a geometrically thin accretion disk which is tilted by \$65{\textasciicircum}\{{\textbackslash}circ\}\$ with respect to the black hole spin axis. We find that the Lense-Thirring torque from the rapidly spinning 10 \$M\_{\textbackslash}odot\$ black hole causes several sub-disks to tear off within \${\textbackslash}sim 10-20\$ gravitational radii. Tearing occurs in cycles on timescales of seconds. During each tearing cycle the inner sub-disk precesses for 1-5 periods before it falls into the black hole. We find a precession frequency of \${\textbackslash}sim 3{\textbackslash}rm Hz\$, consistent with observed low-frequency QPOs. In addition, we find a high frequency QPO (HFQPO) with centroid frequency of \${\textbackslash}sim55\$Hz in the power spectra of the mass-weighted radius of the inner disk. This signal is caused by radial epicyclic oscillations of a dense ring of gas at the tearing radius, which strongly suggests a corresponding modulation of the X-ray lightcurve and may thus explain some of the observed HFQPOs.},
urldate = {2022-01-12},
journal = {arXiv e-prints},
author = {Musoke, G. and Liska, M. and Porth, O. and van der Klis, M. and Ingram, A.},
month = jan,
year = {2022},
note = {ADS Bibcode: 2022arXiv220103085M
Type: article},
keywords = {Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology},
}
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In this work we analyse a high resolution three-dimensional general relativistic magnetohydrodynamic simulation of a geometrically thin accretion disk which is tilted by $65{\\textasciicircum}\\{{\\}circ\\}$ with respect to the black hole spin axis. We find that the Lense-Thirring torque from the rapidly spinning 10 $M_{\\}odot$ black hole causes several sub-disks to tear off within ${\\}sim 10-20$ gravitational radii. Tearing occurs in cycles on timescales of seconds. During each tearing cycle the inner sub-disk precesses for 1-5 periods before it falls into the black hole. We find a precession frequency of ${\\}sim 3{\\}rm Hz$, consistent with observed low-frequency QPOs. In addition, we find a high frequency QPO (HFQPO) with centroid frequency of ${\\}sim55$Hz in the power spectra of the mass-weighted radius of the inner disk. This signal is caused by radial epicyclic oscillations of a dense ring of gas at the tearing radius, which strongly suggests a corresponding modulation of the X-ray lightcurve and may thus explain some of the observed HFQPOs.","urldate":"2022-01-12","journal":"arXiv e-prints","author":[{"propositions":[],"lastnames":["Musoke"],"firstnames":["G."],"suffixes":[]},{"propositions":[],"lastnames":["Liska"],"firstnames":["M."],"suffixes":[]},{"propositions":[],"lastnames":["Porth"],"firstnames":["O."],"suffixes":[]},{"propositions":["van","der"],"lastnames":["Klis"],"firstnames":["M."],"suffixes":[]},{"propositions":[],"lastnames":["Ingram"],"firstnames":["A."],"suffixes":[]}],"month":"January","year":"2022","note":"ADS Bibcode: 2022arXiv220103085M Type: article","keywords":"Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology","bibtex":"@article{musoke_disk_2022,\n\ttitle = {Disk {Tearing} {Leads} to {Low} and {High} {Frequency} {Quasi} {Periodic} {Oscillations} in a {GRMHD} {Simulation} of a {Thin} {Accretion} {Disk}},\n\turl = {https://ui.adsabs.harvard.edu/abs/2022arXiv220103085M},\n\tabstract = {Black hole X-ray binaries (BHXRBs) display a wide range of variability phenomena, from long duration spectral state changes to short-term broadband variability and quasi-periodic oscillations (QPOs). A particularly puzzling aspect is the production of QPOs, which -- if properly understood -- could be used as a powerful diagnostic tool of black hole accretion and evolution. In this work we analyse a high resolution three-dimensional general relativistic magnetohydrodynamic simulation of a geometrically thin accretion disk which is tilted by \\$65{\\textasciicircum}\\{{\\textbackslash}circ\\}\\$ with respect to the black hole spin axis. We find that the Lense-Thirring torque from the rapidly spinning 10 \\$M\\_{\\textbackslash}odot\\$ black hole causes several sub-disks to tear off within \\${\\textbackslash}sim 10-20\\$ gravitational radii. Tearing occurs in cycles on timescales of seconds. During each tearing cycle the inner sub-disk precesses for 1-5 periods before it falls into the black hole. We find a precession frequency of \\${\\textbackslash}sim 3{\\textbackslash}rm Hz\\$, consistent with observed low-frequency QPOs. In addition, we find a high frequency QPO (HFQPO) with centroid frequency of \\${\\textbackslash}sim55\\$Hz in the power spectra of the mass-weighted radius of the inner disk. This signal is caused by radial epicyclic oscillations of a dense ring of gas at the tearing radius, which strongly suggests a corresponding modulation of the X-ray lightcurve and may thus explain some of the observed HFQPOs.},\n\turldate = {2022-01-12},\n\tjournal = {arXiv e-prints},\n\tauthor = {Musoke, G. and Liska, M. and Porth, O. and van der Klis, M. and Ingram, A.},\n\tmonth = jan,\n\tyear = {2022},\n\tnote = {ADS Bibcode: 2022arXiv220103085M\nType: article},\n\tkeywords = {Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology},\n}\n\n","author_short":["Musoke, G.","Liska, M.","Porth, O.","van der Klis, M.","Ingram, A."],"key":"musoke_disk_2022","id":"musoke_disk_2022","bibbaseid":"musoke-liska-porth-vanderklis-ingram-disktearingleadstolowandhighfrequencyquasiperiodicoscillationsinagrmhdsimulationofathinaccretiondisk-2022","role":"author","urls":{"Paper":"https://ui.adsabs.harvard.edu/abs/2022arXiv220103085M"},"keyword":["Astrophysics - High Energy Astrophysical Phenomena","General Relativity and Quantum Cosmology"],"metadata":{"authorlinks":{}},"html":""},"bibtype":"article","biburl":"https://bibbase.org/zotero/valepeirano","dataSources":["ftqMNtyNjLWewoxW9"],"keywords":["astrophysics - high energy astrophysical phenomena","general relativity and quantum cosmology"],"search_terms":["disk","tearing","leads","low","high","frequency","quasi","periodic","oscillations","grmhd","simulation","thin","accretion","disk","musoke","liska","porth","van der klis","ingram"],"title":"Disk Tearing Leads to Low and High Frequency Quasi Periodic Oscillations in a GRMHD Simulation of a Thin Accretion Disk","year":2022}