scholarly journals Gravitational Waves from Supermassive Black Hole Binaries in Ultraluminous Infrared Galaxies

2018 ◽  
Vol 863 (2) ◽  
pp. L36 ◽  
Author(s):  
Kohei Inayoshi ◽  
Kohei Ichikawa ◽  
Zoltán Haiman
Keyword(s):  
Black Hole ◽  
Gravitational Waves ◽  
Infrared Galaxies ◽  
Black Hole Binaries ◽  
Supermassive Black Hole ◽  
Ultraluminous Infrared Galaxies

scholarly journals Constraints on ultra-low-frequency gravitational waves with statistics of pulsar spin-down rates

2019 ◽  
Vol 489 (3) ◽  
pp. 3547-3552
Author(s):  
Hiroki Kumamoto ◽  
Yuya Imasato ◽  
Naoyuki Yonemaru ◽  
Sachiko Kuroyanagi ◽  
Keitaro Takahashi
Keyword(s):  
Black Hole ◽  
Gravitational Waves ◽  
Time Derivative ◽  
Low Frequency ◽  
Upper Bounds ◽  
Galactic Centre ◽  
Frequency Range ◽  
Rate Distribution ◽  
Black Hole Binaries ◽  
Supermassive Black Hole

Abstract We probe ultra-low-frequency gravitational waves (GWs) with statistics of spin-down rates of millisecond pulsars (thereafter MSPs) by a method proposed in our previous work. The considered frequency range is 10−12 Hz ≲ fGW ≲ 10−10  Hz . The effect of such low-frequency GWs appears as a bias to spin-down rates that has a quadrupole pattern in the sky. We use the skewness of the spin-down rate distribution and the number of MSPs with negative spin-down rates to search for the bias induced by GWs. Applying this method to 149 MSPs selected from the ATNF pulsar catalogue, we derive upper bounds on the time derivative of the GW amplitudes of $\dot{h} \lt 6.2 \times 10^{-18}~{\rm s}^{-1}$ and $\dot{h} \lt 8.1 \times 10^{-18}~{\rm s}^{-1}$ in the directions of the Galactic Centre and M87, respectively. Approximating the GW amplitude as $\dot{h} \sim 2 \pi f_{\rm GW} h$, the bounds translate into h < 3 × 10−8 and h < 4 × 10−8, respectively, for fGW = 1/(1000 yr). Finally, we give the implications to possible supermassive black hole binaries at these sites.

scholarly journals The NANOGrav 11 yr Data Set: Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries

2019 ◽  
Vol 880 (2) ◽  
pp. 116 ◽  
Author(s):  
K. Aggarwal ◽  
Z. Arzoumanian ◽  
P. T. Baker ◽  
A. Brazier ◽  
M. R. Brinson ◽  
...  
Keyword(s):  
Black Hole ◽  
Gravitational Waves ◽  
Data Set ◽  
Black Hole Binaries ◽  
Supermassive Black Hole

scholarly journals Limits on First Structure Formation from Pulsar Timing

2015 ◽  
Vol 11 (A29B) ◽  
pp. 329-335
Author(s):  
R. M. Shannon
Keyword(s):  
Black Hole ◽  
Gravitational Waves ◽  
Galaxy Mergers ◽  
Host Galaxies ◽  
Arrival Times ◽  
Black Hole Binaries ◽  
Supermassive Black Hole ◽  
Pulsar Timing ◽  
Formation And Evolution ◽  
Promising Source

AbstractBy monitoring the arrival times from millisecond pulsars for years to decades, it is possible to search for, or place limits on, nanohertz frequency gravitational radiation. The most promising source of gravitational waves in this band is a stochastic background emitted from a population of supermassive black hole binaries. As these binaries are the direct product of of galaxy mergers and the properties of the SMBHs correlated strongly with their host galaxies, the gravitational wave emission of the binaries can be used to study how galaxies evolve. Here I discuss how pulsar timing can be used to search for gravitational waves, and how limits on the strength of the background are being used to challenge models of supermassive black hole formation and evolution.

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