Tidal Disruption from Supermassive Black Hole Binaries in
Tidal Disruption from Supermassive Black Hole Binaries in Merging Galaxies: Before & After the Coalescence Shuo Li NAOC Collaborated with Rainer Spurzem, F. K. Liu, Peter Berczik, Xian Chen & Stefanie Komossa 2014. 04. 30.
Evolution of Supermassive Black Hole Binaries GW Begelman et. al. , 1980. Art by Xian Chen 3 C 75 NGC 6240 0402+379 ~10 pc ~kpc ~10 kpc Rodrigue et al. , 2006 Komossa et al. , 2003 Hudson et al. , 2006 1/6/2022
Tidal Disruption • BH’s tidal gravity conquer star’s self gravity: – Tidal radius: NASA/CXC/M. Weiss 105 M⊙ 106 M⊙ 107 M⊙ 108 M⊙ Linda Strubbe 1/6/2022
Tidal Disruption • Tidal Flare – Mass distribution during tidal disruption (TD): – Re-falling rate: Evans et. al. , APJ 1989, 346 L 13 – Luminosity: 1/6/2022
TD in SMBHB Systems 1/6/2022
TD in SMBHB Systems • A triple system is hierarchical and stable when (Mardling & Aarseth 2001): • The accretion interrupts at a time Ttr : η ~ 0. 27 in average theoretically. Our simulation results have η ~ 0. 25. Liu, F. K. ; Li, S. & Chen, X. , 2009, Art Credit: ESA - C. Carreau 1/6/2022
TD in SMBHB Systems • A triple system is hierarchical and stable when (Mardling & Aarseth 2001): • The accretion interrupts at a time Ttr : SDSS J 120136. 02+300305. 5 η ~ 0. 27 in average theoretically. Our simulation results have η ~ 0. 25. Liu, F. K. , Li, S. & Komossa, S. , 2014 Liu, F. K. ; Li, S. & Chen, X. , 2009, Art Credit: ESA - C. Carreau MBH=107 M⊙, e = 0. 3, q = 0. 08, T = 150 days a ~ 0. 59 mpc ~ 620 rg 1/6/2022
Tidal Disruption of Recoiling SMBH • Boosted TD events around density center in phase I: Higher stellar density; Phase II Li, S. , Liu, F. K. , Berczik, P. , Chen, X. & Spurzem, R. , 2012 1/6/2022
Tidal Disruption of Recoiling SMBH • Boosted TD events around density center in phase I: Higher stellar density; • Monotonic increasing TD rates for recoiling SMBH in phase I: • Constant TD rates for stationary SMBH and recoiling BH in phase II: 1/6/2022
Summary • The SMBHBs in normal galaxies are hard to detect; • TD can be a very powerful tool to study SMBHBs in quiescent galaxies; – – – Boosted TD rates in merging galaxies; The truncation of TD light curve can be used to distinguish SMBHB; Boosted TD rates for recoiling SMBHB passing by galactic center; • Large scale survey like LSST is very important; • Long term follow up observation is very important. 1/6/2022
- Slides: 10