scholarly journals Tidal disruption of stars in a supermassive black hole binary system: the influence of orbital properties on fallback and accretion rates

2018 ◽  
Vol 476 (4) ◽  
pp. 5312-5322 ◽  
Author(s):  
Quentin Vigneron ◽  
Giuseppe Lodato ◽  
Alessio Guidarelli
Keyword(s):  
Black Hole ◽  
Binary System ◽  
Tidal Disruption ◽  
Supermassive Black Hole ◽  
Accretion Rates ◽  
Black Hole Binary

scholarly journals X-ray flares from the stellar tidal disruption by a candidate supermassive black hole binary

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Xinwen Shu ◽  
Wenjie Zhang ◽  
Shuo Li ◽  
Ning Jiang ◽  
Liming Dou ◽  
...  
Keyword(s):  
Black Hole ◽  
X Rays ◽  
Tidal Disruption ◽  
Massive Black Hole ◽  
Ultraviolet Emission ◽  
X Ray ◽  
Black Hole Binaries ◽  
Supermassive Black Hole ◽  
Black Hole Binary

AbstractOptical transient surveys have led to the discovery of dozens of stellar tidal disruption events (TDEs) by massive black hole in the centers of galaxies. Despite extensive searches, X-ray follow-up observations have produced no or only weak X-ray detections in most of them. Here we report the discovery of delayed X-ray brightening around 140 days after the optical outburst in the TDE OGLE16aaa, followed by several flux dips during the decay phase. These properties are unusual for standard TDEs and could be explained by the presence of supermassive black hole binary or patchy obscuration. In either scenario, the X-rays can be produced promptly after the disruption but are blocked in the early phase, possibly by a radiation-dominated ejecta which leads to the bulk of optical and ultraviolet emission. Our findings imply that the reprocessing is important in the TDE early evolution, and X-ray observations are promising in revealing supermassive black hole binaries.

scholarly journals The X-Ray Outburst of PG 1553+113: A Precession Effect of Two Jets in the Supermassive Black Hole Binary System

2021 ◽  
Vol 922 (2) ◽  
pp. 222
Author(s):  
Shifeng Huang ◽  
Hongxing Yin ◽  
Shaoming Hu ◽  
Xu Chen ◽  
Yunguo Jiang ◽  
...  
Keyword(s):  
Black Hole ◽  
Binary System ◽  
Light Curve ◽  
Quiescent State ◽  
Black Hole Mass ◽  
X Ray ◽  
Supermassive Black Hole ◽  
System A ◽  
Black Hole Binary ◽  
Two Jets

Abstract Blazar PG 1553+113 is thought to be a host of supermassive black hole binary system. A 2.2 yr quasi-periodicity in the γ-ray light curve was detected, possibly a result of jet precession. Motivated by the previous studies based on the γ-ray data, we analyzed the X-ray light curve and spectra observed during 2012–2020. The 2.2 yr quasi-periodicity might be consistent with the main-flare recurrence in the X-ray light curve. When a weak rebrightening in the γ-ray was observed, a corresponding relatively strong brightening in the X-ray light curve can be identified. The harder-when-brighter tendency in both X-ray main and weak flares was shown, as well as a weak softer-when-brighter behavior for the quiescent state. We explore the possibility that the variability in the X-ray band can be interpreted with two-jet precession scenario. Using the relation between jets and accretion disks, we derive the primary black hole mass ≃3.47 × 108 M ☉ and mass of the secondary one ≃1.40 × 108 M ☉, and their mass ratio ∼0.41.

scholarly journals Jet Precession Driven by a Supermassive Black Hole Binary System in the BL Lac Object PG 1553+113

2017 ◽  
Vol 851 (2) ◽  
pp. L39 ◽  
Author(s):  
Anderson Caproni ◽  
Zulema Abraham ◽  
Juliana Cristina Motter ◽  
Hektor Monteiro
Keyword(s):  
Black Hole ◽  
Binary System ◽  
Supermassive Black Hole ◽  
Bl Lac ◽  
Black Hole Binary

scholarly journals A reduced orbital period for the supermassive black hole binary candidate in the quasar PG 1302-102?

2015 ◽  
Vol 452 (3) ◽  
pp. 2540-2545 ◽  
Author(s):  
D. J. D'Orazio ◽  
Z. Haiman ◽  
P. Duffell ◽  
B. D. Farris ◽  
A. I. MacFadyen
Keyword(s):  
Black Hole ◽  
Orbital Period ◽  
Supermassive Black Hole ◽  
Black Hole Binary

scholarly journals ALIGNMENT OF SUPERMASSIVE BLACK HOLE BINARY ORBITS AND SPINS

2013 ◽  
Vol 774 (1) ◽  
pp. 43 ◽  
Author(s):  
M. Coleman Miller ◽  
Julian H. Krolik
Keyword(s):  
Black Hole ◽  
Supermassive Black Hole ◽  
Black Hole Binary

scholarly journals Tidal disruption event discs around supermassive black holes: disc warp and inclination evolution

2019 ◽  
Vol 487 (4) ◽  
pp. 4965-4984 ◽  
Author(s):  
J J Zanazzi ◽  
Dong Lai
Keyword(s):  
Black Hole ◽  
Equatorial Plane ◽  
Accretion Rate ◽  
Accretion Disc ◽  
Precession Frequency ◽  
Tidal Disruption ◽  
Eigenmode Analysis ◽  
Accretion Rates ◽  
Rigid Disc ◽  
Disruption Event

ABSTRACT After the tidal disruption event (TDE) of a star around a supermassive black hole (SMBH), the bound stellar debris rapidly forms an accretion disc. If the accretion disc is not aligned with the spinning SMBH’s equatorial plane, the disc will be driven into Lense–Thirring precession around the SMBH’s spin axis, possibly affecting the TDE’s light curve. We carry out an eigenmode analysis of such a disc to understand how the disc’s warp structure, precession, and inclination evolution are influenced by the disc’s and SMBH’s properties. We find an oscillatory warp may develop as a result of strong non-Keplarian motion near the SMBH. The global disc precession frequency matches the Lense–Thirring precession frequency of a rigid disc around a spinning black hole within a factor of a few when the disc’s accretion rate is high, but deviates significantly at low accretion rates. Viscosity aligns the disc with the SMBH’s equatorial plane over time-scales of days to years, depending on the disc’s accretion rate, viscosity, and SMBH’s mass. We also examine the effect of fallback material on the warp evolution of TDE discs, and find that the fallback torque aligns the TDE disc with the SMBH’s equatorial plane in a few to tens of days for the parameter space investigated. Our results place constraints on models of TDE emission which rely on the changing disc orientation with respect to the line of sight to explain observations.

The Nuclear Starburst Driven by a Supermassive Black Hole Binary

1996 ◽  
Vol 469 ◽  
pp. 581 ◽  
Author(s):  
Yoshiaki Taniguchi ◽  
Keiichi Wada
Keyword(s):  
Black Hole ◽  
Supermassive Black Hole ◽  
Black Hole Binary
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