ELFT HÍRADÓ

[Kormányos Andor <andor.kormanyos AT ttk.elte.hu>]

ELTE TTK Fizikai Intézet / ELTE Institute of Physics


ORTVAY KOLLOKVIUM / ORTVAY COLLOQUIUM
(https://physics.elte.hu/ortvayseminar)


Thursday, 12th October  2023, 15:00h.

Pócza Jenő Classroom,  Physics Building 1.71

Pázmány Péter sétány 1/A, 1117 Budapest.


Haiman Zoltán

Columbia University

Merging black holes

The LIGO experiment has detected mergers between stellar-mass black holes, 
and pulsar timing arrays on the ground have discovered stochastic background 
of gravitational waves attributable to merging massive black hole binaries. 
The LISA satellites, planned in space in the mid 2030s, are expected to 
detect gravitational waves (GWs) from individual massive black hole binaries 
at high signal-to-noise.  These black hole mergers should often take place in 
gas-rich galactic nuclei, and therefore should also produce concurrent 
electromagnetic (EM) emission.

In this talk, I will highlight the importance of these black hole mergers for 
astrophysics, cosmology, and fundamental physics, and emphasize the 
additional science potential of joint GW and EM detections.  I will then 
discuss our recent work on the coupled dynamics of a BH binary with 
circumbinary gas, including the expected characteristics of the EM emission 
from such a system, the impact of circumbinary gas on the binary's orbit, and 
the corresponding imprints on the GW signals.  Finally, I will present BH 
binary candidates we have identified based on these signatures, and discuss 
the challenges and future work needed to confirm these binaries and to realize


Andor Kormányos
coordinator