2005MNRAS.358.1361I

Query : 2005MNRAS.358.1361I

2005MNRAS.358.1361I - Mon. Not. R. Astron. Soc., 358, 1361-1378 (2005/April-3)

The tidal disruption rate in dense galactic cusps containing a supermassive binary black hole.

IVANOV P.B., POLNAREV A.G. and SAHA P.

Abstract (from CDS):

We consider the problem of tidal disruption of stars in the centre of a galaxy containing a supermassive binary black hole with unequal masses. We assume that over the separation distance between the black holes, the gravitational potential is dominated by the more massive primary black hole. Also, we assume that the number density of stars is concentric with the primary black hole and has a power-law cusp. We show that the bulk of stars with a small angular-momentum component normal to the black hole binary orbit can reach a small value of total angular momentum through secular evolution in the gravitational field of the binary, and hence they can be tidally disrupted by the larger black hole. This effect is analogous to the so-called Kozai effect well known in celestial mechanics. We develop an analytical theory for the secular evolution of the stellar orbits and calculate the rate of tidal disruption. We compare our analytical theory with a simple numerical model and find very good agreement.

Our results show that for a primary black hole mass of ∼106-107M☉, the black hole mass-ratio q > 10–2, cusp size ∼1 pc, the tidal disruption rate can be as large as ∼10–2-1M☉/yr. This is at least 102-104 times larger than estimated for the case of a single supermassive black hole. The duration of the phase of enhanced tidal disruption is determined by the dynamical-friction time-scale, and it is rather short: ∼105 yr. The dependence of the tidal disruption rate on the mass ratio, and on the size of the cusp, is also discussed.


Abstract Copyright: 2005 RAS

Journal keyword(s): black hole physics - galaxies: nuclei

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2

Query : 2005MNRAS.358.1361I

Basic data :
M 32 -- Galaxy towards a Group of Galaxies
Other object types: otypes_help 		G (2014AJ,APG,...), * (AG,AP,...), GiG (K79,[CHM2007]), AG? (2020MNRAS), X (RX), NIR (2MASS), MIR (WISE), IR (IRAS)
ICRS coord. (ep=J2000) : 		00 42 41.82480 +40 51 54.6120 (Near-IR) [ ] C 2006AJ....131.1163S
FK4 coord. (ep=B1950 eq=1950) : 		00 39 57.82253 +40 35 29.0608 [ ]
Gal coord. (ep=J2000) : 		121.15001697 -21.97633363 [ ]
Proper motions mas/yr : 		-17.0 -5.0 [4.5 4.3 90] B 1988A&AS...74..449R
Radial velocity / Redshift / cz : 		V(km/s) -199.0 [6.0] / z(spectroscopic) -0.000664 [0.000020] / cz -198.93 [6.00]
   C 2012AJ....144....4M
Morphological type: 		cE2 D 2013AJ....146...67B
Angular size (arcmin): 		3.375000000 2.733750105 -20 (NIR) C 2023A&A...675A..90P
Fluxes (6) :
U 9.51 [0.05] D 2007ApJS..173..185G
B 9.03 [0.05] D 2007ApJS..173..185G
V 8.08 [0.05] D 2007ApJS..173..185G
J 6.277 [0.016] C 2006AJ....131.1163S
H 5.366 [0.016] C 2006AJ....131.1163S
K 5.095 [0.017] C 2006AJ....131.1163S
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 6
: 729 		: 26853 Display criteria :

Identifiers (24) :
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M 32 IRAS 00399+4035 NGC 221 Z 535-16
AG+40 59 K79 1B PPM 43225 Z 0039.9+4036
AP J00424183+4051550 LEDA 2555 RX J0042.6+4052 [CHM2007] LDC 31 J004241.82+4051546
APG 168 2MASS J00424182+4051547 UGC 452 [CHM2007] HDC 29 J004241.82+4051546
Ark 12 2MASX J00424182+4051546 UZC J004241.8+405154 [FWB89] Galaxy 8
BD+40 147 MCG+07-02-015 WISE J004241.80+405154.9 [M98c] 003957.7+403529

References (2236 between 1850 and 2026) (Total 2236)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 12    Distance : 9    Fe/H : 1    PM : 1   

   

Observing logs
ISO : 18    IUE : 11   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : M 32

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AG+40 59 AP J00424183+4051550 APG 168 BD+40 147 IRAS 00399+4035
2MASS J00424182+4051547 2MASX J00424182+4051546 NGC 221 PPM 43225 UGC 452
WISE J004241.80+405154.9

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