dark matter probes of supermassive black hole s
DESCRIPTION
DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S. HotSci 23 July 2014. Joe Silk (IAP, JHU). SMBH binaries in quasars may be common a t parsec scales, from Balmer line offsets. Liu e al 2013. Benson 2014. Stuck at the final parsec…. Mpc. Inoue + 2013. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/1.jpg)
DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLES
HotSci 23 July 2014
Joe Silk (IAP, JHU)
![Page 2: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/2.jpg)
SMBH binaries in quasars may be commonat parsec scales,from Balmer line offsets
Liu e al 2013
![Page 3: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/3.jpg)
Stuck at the final parsec…Benson 2014
Mpc
![Page 4: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/4.jpg)
IMBH EXPEL BARYONSTwo baryon problems:Too big to fail dwarfs & low baryon fraction in massive galaxies
Intermediate mass BH 103-106 Msun
Inoue + 2013
![Page 5: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/5.jpg)
supernovae
IMBH
Baryon fraction fraction
Peirani + 2012Boylan-Kirchin et al. 2011
predicted hosts,not observed
Duc + 2013
Dubois+ 2013
![Page 6: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/6.jpg)
Gondolo + JS 1999, Gnedin & Primack 2004, Sadeghian, Ferrer + Will 2013
<v>
mxPlateau: nx(r)<sv> tBH ~ 1Density profile
![Page 7: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/7.jpg)
Vasiliev & Zelnikov 2008
tr (GC,M31)~3Gyr
but SMBH at GC grows over 1 Gyr& tr (M87 SMBH)~105Gyr!
~tr
~3tr
Does cusp survive? MAYBE!
![Page 8: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/8.jpg)
NEAR BINARY BLACK HOLES
![Page 9: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/9.jpg)
Kozai mechanism drives resonant infall of DM in eccentric orbits………operates for binary black hole
Naoz and Silk 2014
![Page 10: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/10.jpg)
Naoz and Silk 2014 Dark matter torus forms
![Page 11: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/11.jpg)
supermassive black hole at Galactic Center HESS J1745-290 prediction for CTA: superexponential signature of TeV DM annihilations
Belikov & JS 2013
Vaiana + 2014
30-300 GeV
the near future
![Page 12: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/12.jpg)
NEARBY AGN
M87 is an attractive target
Distance 2000 x GC but MBH 1000 x SagA*
Flux ~ nx2<sv> (2rp)3 ~ MBH
3/<sv> for low <sv> nx(rp)<sv> tBH ~ 1
Dynamical heating of spike ~ 1014 yr vs 109 yr (GC)
![Page 13: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/13.jpg)
Gorchtein et al 2010
Gomez et al 2013
M87
CenA
relativistic jets emanate from ergosphere, so high energy e,p collide with DM spike particles!
![Page 14: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/14.jpg)
EXTRAGALACTIC GAMMA RAY BACKGROUND
There is room for an exotic component from dark matter
EXTRACALACTIC DIFFUSE g RAY BACKGROUND
![Page 15: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/15.jpg)
10 TeV
1 TeV
0.1 TeV
NFW
Belikov & Silk 2013
Annihilations In dark matter spikes around supermassive black holes
![Page 16: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/16.jpg)
THE ULTIMATE PARTICLE ACCELERATOR: dark matter cusp around black hole
particle horizon
Schwarzschild
BLACK HOLES
maximum 4.5 m
![Page 17: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/17.jpg)
NEAR KERRBLACK HOLES
ergosphere Penrose process
![Page 18: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/18.jpg)
![Page 19: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/19.jpg)
particle horizonrS=2GM/c2
Banados, West, JS 2009
Highly controversial…but the dust hasn’t settled yet!
Kerr black hole
near event-horizon particle collisionsof KK particles: excitations
Arina, Bringmann, Vollmann, JS 2014
Rotating black hole can feed Penrose effect via DM particle collisions
no maximumfor extremal Kerr!
![Page 20: DARK MATTER PROBES OF SUPERMASSIVE BLACK HOLE S](https://reader035.vdocuments.us/reader035/viewer/2022062422/5681331c550346895d99e195/html5/thumbnails/20.jpg)
Black hole shadow
Event Horizon Telescope
Simulated image at 1mmof M87 or SagA* black hole
Resolve horizon scale GM/c2 at ~5 m arcsec
Huang + 2007
M87 distance 2000 x GC but MBH 1000 x SagA*