NAOC Open IR
Properties of loss cone stars in a cosmological galaxy merger remnant
Avramov, Branislav1; Berczik, Peter1,2,3,4; Meiron, Yohai5,6; Acharya, Anshuman7; Just, Andreas1
2021-05-07
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume649Pages:17
AbstractAims. We investigate the orbital and phase space properties of loss cone stars that interact strongly with a hard, high-redshift binary supermassive black hole (SMBH) system formed in a cosmological scenario.Methods. We use a novel hybrid integration approach that combines the direct N-body code -GRAPE with ETICS, a collisionless code that employs the self-consistent field method for force calculation. The hybrid approach shows considerable speed-up over direct summation for particle numbers > 10(6), while retaining accuracy of direct N-body for a subset of particles. During the SMBH binary evolution we monitor individual stellar interactions with the binary in order to identify stars that noticeably contribute to the SMBH binary hardening.Results. We successfully identify and analyze in detail the properties of stars that extract energy from the binary. We find that the summed energy changes seen in these stars match very well with the overall binary energy change, demonstrating that stellar interactions are the primary drivers of SMBH binary hardening in triaxial, gas-poor systems. We find that 76% of these stars originate from centrophilic orbits, only possible in a triaxial system. As a result, even the slight triaxiality of our system results in efficient refilling of the loss cone, avoiding the final parsec problem. We distinguish three different populations of interactions based on their apocenter. We find a clear prevalence of interactions co-rotating with the binary. Nevertheless, retrograde interactions are the most energetic, contributing only slightly less than the prograde population to the overall energy exchange. The most energetic interactions are also likely to result in a change of sign in the angular momentum of the star. We estimate the merger timescale of the binary to be approximate to 20 Myr, a value larger by a factor of two than the timescale reported in a previous study.
Keywordblack hole physics methods: numerical stars: kinematics and dynamics galaxies: evolution
Funding OrganizationInternational Max Planck Research School (IMPRS) at the University of Heidelberg ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; Volkswagen Foundation ; Volkswagen Foundation ; Gauss Centre for Supercomputing e.V. ; Gauss Centre for Supercomputing e.V. ; state of Baden-Wurttemberg through bwHPC ; state of Baden-Wurttemberg through bwHPC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; President's International Fellowship (PIFI) ; President's International Fellowship (PIFI) ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Volkswagen Foundation ; Volkswagen Foundation ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; Volkswagen Foundation ; Volkswagen Foundation ; Gauss Centre for Supercomputing e.V. ; Gauss Centre for Supercomputing e.V. ; state of Baden-Wurttemberg through bwHPC ; state of Baden-Wurttemberg through bwHPC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; President's International Fellowship (PIFI) ; President's International Fellowship (PIFI) ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Volkswagen Foundation ; Volkswagen Foundation ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; Volkswagen Foundation ; Volkswagen Foundation ; Gauss Centre for Supercomputing e.V. ; Gauss Centre for Supercomputing e.V. ; state of Baden-Wurttemberg through bwHPC ; state of Baden-Wurttemberg through bwHPC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; President's International Fellowship (PIFI) ; President's International Fellowship (PIFI) ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Volkswagen Foundation ; Volkswagen Foundation ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; Volkswagen Foundation ; Volkswagen Foundation ; Gauss Centre for Supercomputing e.V. ; Gauss Centre for Supercomputing e.V. ; state of Baden-Wurttemberg through bwHPC ; state of Baden-Wurttemberg through bwHPC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; President's International Fellowship (PIFI) ; President's International Fellowship (PIFI) ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Volkswagen Foundation ; Volkswagen Foundation ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; NRF of Ukraine 'Leading and Young Scientists Research Support'
DOI10.1051/0004-6361/202039698
WOS KeywordMASSIVE BLACK-HOLE ; FINAL-PARSEC PROBLEM ; LONG-TERM EVOLUTION ; GALACTIC NUCLEI ; N-BODY ; BINARY EVOLUTION ; TIDAL DISRUPTION ; GRAVITATIONAL-RADIATION ; DYNAMICAL EVOLUTION ; KINEMATIC SIGNATURE
Language英语
Funding ProjectInternational Max Planck Research School (IMPRS) at the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; Volkswagen Foundation ; Gauss Centre for Supercomputing e.V. ; state of Baden-Wurttemberg through bwHPC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; President's International Fellowship (PIFI) ; National Science Foundation of China[11673032] ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)[138713538 - SFB 881] ; Volkswagen Foundation[90411] ; Volkswagen Foundation[97778] ; NRF of Ukraine 'Leading and Young Scientists Research Support'[2020.02/0346]
Funding OrganizationInternational Max Planck Research School (IMPRS) at the University of Heidelberg ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; Volkswagen Foundation ; Volkswagen Foundation ; Gauss Centre for Supercomputing e.V. ; Gauss Centre for Supercomputing e.V. ; state of Baden-Wurttemberg through bwHPC ; state of Baden-Wurttemberg through bwHPC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; President's International Fellowship (PIFI) ; President's International Fellowship (PIFI) ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Volkswagen Foundation ; Volkswagen Foundation ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; Volkswagen Foundation ; Volkswagen Foundation ; Gauss Centre for Supercomputing e.V. ; Gauss Centre for Supercomputing e.V. ; state of Baden-Wurttemberg through bwHPC ; state of Baden-Wurttemberg through bwHPC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; President's International Fellowship (PIFI) ; President's International Fellowship (PIFI) ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Volkswagen Foundation ; Volkswagen Foundation ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; Volkswagen Foundation ; Volkswagen Foundation ; Gauss Centre for Supercomputing e.V. ; Gauss Centre for Supercomputing e.V. ; state of Baden-Wurttemberg through bwHPC ; state of Baden-Wurttemberg through bwHPC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; President's International Fellowship (PIFI) ; President's International Fellowship (PIFI) ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Volkswagen Foundation ; Volkswagen Foundation ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; International Max Planck Research School (IMPRS) at the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; "Landesgraduiertenstipendium" of the University of Heidelberg ; Volkswagen Foundation ; Volkswagen Foundation ; Gauss Centre for Supercomputing e.V. ; Gauss Centre for Supercomputing e.V. ; state of Baden-Wurttemberg through bwHPC ; state of Baden-Wurttemberg through bwHPC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; Chinese Academy of Sciences through the Silk Roadss Project at NAOC ; President's International Fellowship (PIFI) ; President's International Fellowship (PIFI) ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; Volkswagen Foundation ; Volkswagen Foundation ; NRF of Ukraine 'Leading and Young Scientists Research Support' ; NRF of Ukraine 'Leading and Young Scientists Research Support'
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000655053200004
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/77041
Collection中国科学院国家天文台
Corresponding AuthorAvramov, Branislav
Affiliation1.Heidelberg Univ, Astron Rech Inst ARI, Zentrum Astron, Monchhofstr 12-14, D-69120 Heidelberg, Germany
2.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100101, Peoples R China
4.Natl Acad Sci Ukraine, Main Astron Observ, 27 Akad Zabolotnoho St, UA-03143 Kiev, Ukraine
5.Univ Toronto, Dept Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada
6.Univ Toronto, SciNet High Performance Comp Consortium, 661 Univ Ave, Toronto, ON M5G 1M1, Canada
7.Indian Inst Sci Educ & Res IISER Mohali, Sas Nagar 140306, Punjab, India
Recommended Citation
GB/T 7714
Avramov, Branislav,Berczik, Peter,Meiron, Yohai,et al. Properties of loss cone stars in a cosmological galaxy merger remnant[J]. ASTRONOMY & ASTROPHYSICS,2021,649:17.
APA Avramov, Branislav,Berczik, Peter,Meiron, Yohai,Acharya, Anshuman,&Just, Andreas.(2021).Properties of loss cone stars in a cosmological galaxy merger remnant.ASTRONOMY & ASTROPHYSICS,649,17.
MLA Avramov, Branislav,et al."Properties of loss cone stars in a cosmological galaxy merger remnant".ASTRONOMY & ASTROPHYSICS 649(2021):17.
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