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FAST COALESCENCE OF MASSIVE BLACK HOLE BINARIES FROM MERGERS OF GALACTIC NUCLEI: IMPLICATIONS FOR LOW-FREQUENCY GRAVITATIONAL-WAVE ASTROPHYSICS
Preto, Miguel1,2; Berentzen, Ingo1,3; Berczik, Peter1,4,5; Spurzem, Rainer1,4,6
2011-05-10
Source PublicationASTROPHYSICAL JOURNAL LETTERS
Volume732Issue:2
AbstractWe investigate a purely stellar dynamical solution to the Final Parsec Problem. Galactic nuclei resulting from major mergers are not spherical, but show some degree of triaxiality. With N-body simulations, we show that equal-mass massive black hole binaries (MBHBs) hosted by them will continuously interact with stars on centrophilic orbits and will thus inspiral-in much less than a Hubble time-down to separations at which gravitational-wave (GW) emission is strong enough to drive them to coalescence. Such coalescences will be important sources of GWs for future space-borne detectors such as the Laser Interferometer Space Antenna (LISA). Based on our results for equal-mass mergers, and given that the hardening rate of unequal-mass binaries is similar, we expect that LISA will see between similar to 10 and similar to few x 10(2) such events every year, depending on the particular massive black hole (MBH) seed model as obtained in recent studies of merger trees of galaxy and MBH co-evolution. Orbital eccentricities in the LISA band will be clearly distinguishable from zero with e greater than or similar to 0.001-0.01.
KeywordBlack Hole Physics Galaxies: Nuclei Gravitational Waves
DOI10.1088/2041-8205/732/2/L26
Indexed BySCI
Language英语
WOS IDWOS:000293133200008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7862
Collection星系宇宙学研究部
Affiliation1.Heidelberg Univ, Astron Rechen Inst, Zentrum Astron, D-69120 Heidelberg, Germany
2.Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-14476 Potsdam, Germany
3.Heidelberg Univ, Zentrum Astron, Inst Theoret Astrophys, D-69120 Heidelberg, Germany
4.Chinese Acad Sci, NAOC, Beijing 100012, Peoples R China
5.NASU, MAO, UA-03680 Kiev, Ukraine
6.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Preto, Miguel,Berentzen, Ingo,Berczik, Peter,et al. FAST COALESCENCE OF MASSIVE BLACK HOLE BINARIES FROM MERGERS OF GALACTIC NUCLEI: IMPLICATIONS FOR LOW-FREQUENCY GRAVITATIONAL-WAVE ASTROPHYSICS[J]. ASTROPHYSICAL JOURNAL LETTERS,2011,732(2).
APA Preto, Miguel,Berentzen, Ingo,Berczik, Peter,&Spurzem, Rainer.(2011).FAST COALESCENCE OF MASSIVE BLACK HOLE BINARIES FROM MERGERS OF GALACTIC NUCLEI: IMPLICATIONS FOR LOW-FREQUENCY GRAVITATIONAL-WAVE ASTROPHYSICS.ASTROPHYSICAL JOURNAL LETTERS,732(2).
MLA Preto, Miguel,et al."FAST COALESCENCE OF MASSIVE BLACK HOLE BINARIES FROM MERGERS OF GALACTIC NUCLEI: IMPLICATIONS FOR LOW-FREQUENCY GRAVITATIONAL-WAVE ASTROPHYSICS".ASTROPHYSICAL JOURNAL LETTERS 732.2(2011).
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